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131 | .IX Title "GVPE.CONF 5" |
126 | .IX Title "GVPE.CONF 5" |
132 | .TH GVPE.CONF 5 "2005-03-23" "1.9" "GNU Virtual Private Ethernet" |
127 | .TH GVPE.CONF 5 "2013-10-11" "2.25" "GNU Virtual Private Ethernet" |
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129 | .\" way too many mistakes in technical documents. |
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130 | .if n .ad l |
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131 | .nh |
133 | .SH "NAME" |
132 | .SH "NAME" |
134 | gvpe.conf \- configuration file for the GNU VPE daemon |
133 | gvpe.conf \- configuration file for the GNU VPE daemon |
135 | .SH "SYNOPSIS" |
134 | .SH "SYNOPSIS" |
136 | .IX Header "SYNOPSIS" |
135 | .IX Header "SYNOPSIS" |
137 | .Vb 3 |
136 | .Vb 4 |
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137 | \& # global options for all nodes |
138 | \& udp-port = 407 |
138 | \& udp\-port = 407 |
139 | \& mtu = 1492 |
139 | \& mtu = 1492 |
140 | \& ifname = vpn0 |
140 | \& ifname = vpn0 |
141 | .Ve |
141 | \& |
142 | .PP |
142 | \& # first node is named branch1 and is at 1.2.3.4 |
143 | .Vb 2 |
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144 | \& node = branch1 |
143 | \& node = branch1 |
145 | \& hostname = 1.2.3.4 |
144 | \& hostname = 1.2.3.4 |
146 | .Ve |
145 | \& |
147 | .PP |
146 | \& # second node uses dns to resolve the address |
148 | .Vb 3 |
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149 | \& node = branch2 |
147 | \& node = branch2 |
150 | \& hostname = www.example.net |
148 | \& hostname = www.example.net |
151 | \& udp-port = 500 # this host uses a different udp-port |
149 | \& udp\-port = 500 # this host uses a different udp\-port |
152 | .Ve |
150 | \& |
153 | .PP |
151 | \& # third node has no fixed ip address |
154 | .Vb 2 |
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155 | \& node = branch3 |
152 | \& node = branch3 |
156 | \& connect = ondemand |
153 | \& connect = ondemand |
157 | .Ve |
154 | .Ve |
158 | .SH "DESCRIPTION" |
155 | .SH "DESCRIPTION" |
159 | .IX Header "DESCRIPTION" |
156 | .IX Header "DESCRIPTION" |
160 | The gvpe config file consists of a series of lines that contain \f(CW\*(C`variable |
157 | The gvpe config file consists of a series of lines that contain \f(CW\*(C`variable |
161 | = value\*(C'\fR pairs. Empty lines are ignored. Comments start with a \f(CW\*(C`#\*(C'\fR and |
158 | = value\*(C'\fR pairs. Empty lines are ignored. Comments start with a \f(CW\*(C`#\*(C'\fR and |
162 | extend to the end of the line. They can be used on their own lines, or |
159 | extend to the end of the line. They can be used on their own lines, or |
163 | after any directives. Spaces are allowed before or after the \f(CW\*(C`=\*(C'\fR sign or |
160 | after any directives. Whitespace is allowed around the \f(CW\*(C`=\*(C'\fR sign or after |
164 | after values, but not within the variable names or values themselves. |
161 | values, but not within the variable names or values themselves. |
165 | .PP |
162 | .PP |
166 | The only exception to the above is the \*(L"on\*(R" directive that can prefix any |
163 | All settings are applied \*(L"in order\*(R", that is, later settings of the same |
167 | \&\f(CW\*(C`name = value\*(C'\fR setting and will only \*(L"execute\*(R" it on the named node, or |
164 | variable overwrite earlier ones. |
168 | (if the nodename starts with \*(L"!\*(R") on all nodes except the named one. |
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169 | .PP |
165 | .PP |
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166 | The only exceptions to the above are the following directives: |
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167 | .IP "node nodename" 4 |
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168 | .IX Item "node nodename" |
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169 | Introduces a node section. The nodename is used to select the right |
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170 | configuration section and is the same string as is passed as an argument |
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171 | to the gvpe daemon. |
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172 | .Sp |
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173 | Multiple \f(CW\*(C`node\*(C'\fR statements with the same node name are supported and will |
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174 | be merged together. |
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175 | .IP "global" 4 |
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176 | .IX Item "global" |
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177 | This statement switches back to the global section, which is mainly |
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178 | useful if you want to include a second config file, e..g for local |
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179 | customisations. To do that, simply include this at the very end of your |
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180 | config file: |
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181 | .Sp |
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182 | .Vb 2 |
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183 | \& global |
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184 | \& include local.conf |
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185 | .Ve |
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186 | .IP "on nodename ..." 4 |
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187 | .IX Item "on nodename ..." |
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188 | .PD 0 |
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189 | .IP "on !nodename ..." 4 |
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190 | .IX Item "on !nodename ..." |
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191 | .PD |
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192 | You can prefix any configuration directive with \f(CW\*(C`on\*(C'\fR and a nodename. \s-1GVPE\s0 |
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193 | will will only \*(L"execute\*(R" it on the named node, or (if the nodename starts |
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194 | with \f(CW\*(C`!\*(C'\fR) on all nodes except the named one. |
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195 | .Sp |
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196 | Example: set the \s-1MTU\s0 to \f(CW1450\fR everywhere, \f(CW\*(C`loglevel\*(C'\fR to \f(CW\*(C`noise\*(C'\fR on |
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197 | \&\f(CW\*(C`branch1\*(C'\fR, and \f(CW\*(C`connect\*(C'\fR to \f(CW\*(C`ondemand\*(C'\fR everywhere but on branch2. |
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198 | .Sp |
170 | .Vb 3 |
199 | .Vb 3 |
171 | \& name = value |
200 | \& mtu = 1450 |
172 | \& on branch1 loglevel = noise |
201 | \& on branch1 loglevel = noise |
173 | \& on !branch2 connect = ondemand |
202 | \& on !branch2 connect = ondemand |
174 | .Ve |
203 | .Ve |
175 | .PP |
204 | .IP "include relative-or-absolute-path" 4 |
176 | All settings are executed \*(L"in order\*(R", that is, later settings of the same |
205 | .IX Item "include relative-or-absolute-path" |
177 | variable overwrite earlier ones. |
206 | Reads the specified file (the path must not contain whitespace or \f(CW\*(C`=\*(C'\fR |
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207 | characters) and evaluate all config directives in it as if they were |
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208 | spelled out in place of the \f(CW\*(C`include\*(C'\fR directive. |
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209 | .Sp |
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210 | The path is a printf format string, that is, you must escape any \f(CW\*(C`%\*(C'\fR |
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211 | by doubling it, and you can have a single \f(CW%s\fR inside, which will be |
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212 | replaced by the current nodename. |
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213 | .Sp |
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214 | Relative paths are interpreted relative to the \s-1GVPE\s0 config directory. |
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215 | .Sp |
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216 | Example: include the file \fIlocal.conf\fR in the config directory on every |
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217 | node. |
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218 | .Sp |
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219 | .Vb 1 |
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220 | \& include local.conf |
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221 | .Ve |
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222 | .Sp |
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223 | Example: include a file \fIconf/\fRnodename\fI.conf\fR |
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224 | .Sp |
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225 | .Vb 1 |
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226 | \& include conf/%s.conf |
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227 | .Ve |
178 | .SH "ANATOMY OF A CONFIG FILE" |
228 | .SH "ANATOMY OF A CONFIG FILE" |
179 | .IX Header "ANATOMY OF A CONFIG FILE" |
229 | .IX Header "ANATOMY OF A CONFIG FILE" |
180 | Usually, a config file starts with global settings (like the udp port to |
230 | Usually, a config file starts with a few global settings (like the \s-1UDP\s0 |
181 | listen on), followed by node-specific sections that begin with a \f(CW\*(C`node = |
231 | port to listen on), followed by node-specific sections that begin with a |
182 | nickname\*(C'\fR line. |
232 | \&\f(CW\*(C`node = nickname\*(C'\fR line. |
183 | .PP |
233 | .PP |
184 | Every node that is part of the network must have a section that starts |
234 | Every node that is part of the network must have a section that starts |
185 | with \f(CW\*(C`node = nickname\*(C'\fR. The number and order of the nodes is important |
235 | with \f(CW\*(C`node = nickname\*(C'\fR. The number and order of the nodes is important |
186 | and must be the same on all hosts. It is not uncommon for node sections to |
236 | and must be the same on all nodes. It is not uncommon for node sections to |
187 | be completely empty \- if the default values are right. |
237 | be completely empty \- if the default values are right. |
188 | .PP |
238 | .PP |
189 | Node-specific settings can be used at any time. If used before the first |
239 | Node-specific settings can be used at any time. If used before the first |
190 | node section they will set the default values for all following nodes. |
240 | node section they will set the default values for all following nodes. |
191 | .SH "CONFIG VARIABLES" |
241 | .SH "CONFIG VARIABLES" |
192 | .IX Header "CONFIG VARIABLES" |
242 | .IX Header "CONFIG VARIABLES" |
193 | .Sh "\s-1GLOBAL\s0 \s-1SETTINGS\s0" |
243 | .SS "\s-1GLOBAL\s0 \s-1SETTINGS\s0" |
194 | .IX Subsection "GLOBAL SETTINGS" |
244 | .IX Subsection "GLOBAL SETTINGS" |
195 | Global settings will affect the behaviour of the running gvpe daemon, that |
245 | Global settings will affect the behaviour of the running gvpe daemon, that |
196 | is, they are in some sense node-specific (config files can set different |
246 | is, they are in some sense node-specific (config files can set different |
197 | values on different nodes using \f(CW\*(C`on\*(C'\fR), but will affect the behaviour of |
247 | values on different nodes using \f(CW\*(C`on\*(C'\fR), but will affect the behaviour of |
198 | the gvpe daemon and all connections it creates. |
248 | the gvpe daemon and all connections it creates. |
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249 | .IP "chroot = path or /" 4 |
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250 | .IX Item "chroot = path or /" |
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251 | Tells \s-1GVPE\s0 to \fIchroot\fR\|(2) to the specified path after reading all necessary |
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252 | files, binding to sockets and running the \f(CW\*(C`if\-up\*(C'\fR script, but before |
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253 | running \f(CW\*(C`node\-up\*(C'\fR or any other scripts. |
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254 | .Sp |
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255 | The special path \fI/\fR instructs \s-1GVPE\s0 to create (and remove) an empty |
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256 | temporary directory to use as new root. This is most secure, but makes it |
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257 | impossible to use any scripts other than the \f(CW\*(C`if\-up\*(C'\fR one. |
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258 | .IP "chuid = numerical-uid" 4 |
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259 | .IX Item "chuid = numerical-uid" |
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260 | .PD 0 |
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261 | .IP "chgid = numerical-gid" 4 |
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262 | .IX Item "chgid = numerical-gid" |
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263 | .PD |
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264 | These two options tell \s-1GVPE\s0 to change to the given user and/or group id |
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265 | after reading all necessary files, binding to sockets and running the |
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266 | \&\f(CW\*(C`if\-up\*(C'\fR script. |
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267 | .Sp |
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268 | Other scripts, such as \f(CW\*(C`node\-up\*(C'\fR, are run with the new user id or group id. |
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269 | .IP "chuser = username" 4 |
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270 | .IX Item "chuser = username" |
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271 | Alternative to \f(CW\*(C`chuid\*(C'\fR and \f(CW\*(C`chgid\*(C'\fR: Sets both \f(CW\*(C`chuid\*(C'\fR and \f(CW\*(C`chgid\*(C'\fR |
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272 | to the user and (primary) group ids of the specified user (for example, |
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273 | \&\f(CW\*(C`nobody\*(C'\fR). |
199 | .IP "dns-forw-host = hostname/ip" 4 |
274 | .IP "dns-forw-host = hostname/ip" 4 |
200 | .IX Item "dns-forw-host = hostname/ip" |
275 | .IX Item "dns-forw-host = hostname/ip" |
201 | The dns server to forward dns requests to for the \s-1DNS\s0 tunnel protocol |
276 | The \s-1DNS\s0 server to forward \s-1DNS\s0 requests to for the \s-1DNS\s0 tunnel protocol |
202 | (default: \f(CW127.0.0.1\fR, changing it is highly recommended). |
277 | (default: \f(CW127.0.0.1\fR, changing it is highly recommended). |
203 | .IP "dns-forw-port = port-number" 4 |
278 | .IP "dns-forw-port = port-number" 4 |
204 | .IX Item "dns-forw-port = port-number" |
279 | .IX Item "dns-forw-port = port-number" |
205 | The port where the \f(CW\*(C`dns\-forw\-host\*(C'\fR is to be contacted (default: \f(CW53\fR, |
280 | The port where the \f(CW\*(C`dns\-forw\-host\*(C'\fR is to be contacted (default: \f(CW53\fR, |
206 | which is fine in most cases). |
281 | which is fine in most cases). |
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282 | .IP "dns-case-preserving = yes|true|on | no|false|off" 4 |
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283 | .IX Item "dns-case-preserving = yes|true|on | no|false|off" |
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284 | Sets whether the \s-1DNS\s0 transport forwarding server preserves case (\s-1DNS\s0 |
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285 | servers have to, but some access systems are even more broken than others) |
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286 | (default: true). |
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287 | .Sp |
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288 | Normally, when the forwarding server changes the case of domain names then |
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289 | \&\s-1GVPE\s0 will automatically set this to false. |
207 | .IP "dns-max-outstanding = integer-number-of-requests" 4 |
290 | .IP "dns-max-outstanding = integer-number-of-requests" 4 |
208 | .IX Item "dns-max-outstanding = integer-number-of-requests" |
291 | .IX Item "dns-max-outstanding = integer-number-of-requests" |
209 | The maximum number of outstanding \s-1DNS\s0 transport requests |
292 | The maximum number of outstanding \s-1DNS\s0 transport requests |
210 | (default: \f(CW100\fR). \s-1GVPE\s0 will never issue more requests then the given |
293 | (default: \f(CW100\fR). \s-1GVPE\s0 will never issue more requests then the given |
211 | limit without receiving replies. In heavily overloaded situations it might |
294 | limit without receiving replies. In heavily overloaded situations it might |
212 | help to set this to a low number (e.g. \f(CW3\fR or even \f(CW1\fR) to limit the |
295 | help to set this to a low number (e.g. \f(CW3\fR or even \f(CW1\fR) to limit the |
213 | number of parallel requests. |
296 | number of parallel requests. |
214 | .Sp |
297 | .Sp |
215 | The default should be working ok for most links. |
298 | The default should be working \s-1OK\s0 for most links. |
216 | .IP "dns-overlap-factor = float" 4 |
299 | .IP "dns-overlap-factor = float" 4 |
217 | .IX Item "dns-overlap-factor = float" |
300 | .IX Item "dns-overlap-factor = float" |
218 | The \s-1DNS\s0 transport uses the minimum request latency (\fBmin_latency\fR) seen |
301 | The \s-1DNS\s0 transport uses the minimum request latency (\fBmin_latency\fR) seen |
219 | during a connection as it's timing base. This factor (default: \f(CW0.5\fR, |
302 | during a connection as it's timing base. This factor (default: \f(CW0.5\fR, |
220 | must be > 0) is multiplied by \fBmin_latency\fR to get the maximum sending |
303 | must be > 0) is multiplied by \fBmin_latency\fR to get the maximum sending |
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222 | request might be generated every \fBmin_latency\fR seconds, which means on |
305 | request might be generated every \fBmin_latency\fR seconds, which means on |
223 | average there should only ever be one outstanding request. A factor of |
306 | average there should only ever be one outstanding request. A factor of |
224 | \&\f(CW0.5\fR means that \s-1GVPE\s0 will send requests twice as often as the minimum |
307 | \&\f(CW0.5\fR means that \s-1GVPE\s0 will send requests twice as often as the minimum |
225 | latency measured. |
308 | latency measured. |
226 | .Sp |
309 | .Sp |
227 | For congested or picky dns forwarders you could use a value nearer to or |
310 | For congested or picky \s-1DNS\s0 forwarders you could use a value nearer to or |
228 | exceeding \f(CW1\fR. |
311 | exceeding \f(CW1\fR. |
229 | .Sp |
312 | .Sp |
230 | The default should be working ok for most links. |
313 | The default should be working \s-1OK\s0 for most links. |
231 | .IP "dns-send-interval = send-interval-in-seconds" 4 |
314 | .IP "dns-send-interval = send-interval-in-seconds" 4 |
232 | .IX Item "dns-send-interval = send-interval-in-seconds" |
315 | .IX Item "dns-send-interval = send-interval-in-seconds" |
233 | The minimum send interval (= maximum rate) that the \s-1DNS\s0 transport will |
316 | The minimum send interval (= maximum rate) that the \s-1DNS\s0 transport will |
234 | use to send new \s-1DNS\s0 requests. \s-1GVPE\s0 will not exceed this rate even when |
317 | use to send new \s-1DNS\s0 requests. \s-1GVPE\s0 will not exceed this rate even when |
235 | the latency is very low. The default is \f(CW0.01\fR, which means \s-1GVPE\s0 will |
318 | the latency is very low. The default is \f(CW0.01\fR, which means \s-1GVPE\s0 will |
236 | not send more than 100 \s-1DNS\s0 requests per connection per second. For |
319 | not send more than 100 \s-1DNS\s0 requests per connection per second. For |
237 | high-bandwidth links you could go lower, e.g. to \f(CW0.001\fR or so. For |
320 | high-bandwidth links you could go lower, e.g. to \f(CW0.001\fR or so. For |
238 | congested or rate-limited links, you might want to go higher, say \f(CW0.1\fR, |
321 | congested or rate-limited links, you might want to go higher, say \f(CW0.1\fR, |
239 | \&\f(CW0.2\fR or even higher. |
322 | \&\f(CW0.2\fR or even higher. |
240 | .Sp |
323 | .Sp |
241 | The default should be working ok for most links. |
324 | The default should be working \s-1OK\s0 for most links. |
242 | .IP "dns-timeout-factor = float" 4 |
325 | .IP "dns-timeout-factor = float" 4 |
243 | .IX Item "dns-timeout-factor = float" |
326 | .IX Item "dns-timeout-factor = float" |
244 | Factor to multiply the \f(CW\*(C`min_latency\*(C'\fR (see \f(CW\*(C`dns\-overlap\-factor\*(C'\fR) by to |
327 | Factor to multiply the \f(CW\*(C`min_latency\*(C'\fR (see \f(CW\*(C`dns\-overlap\-factor\*(C'\fR) by to |
245 | get request timeouts. The default of \f(CW8\fR means that the \s-1DNS\s0 transport |
328 | get request timeouts. The default of \f(CW8\fR means that the \s-1DNS\s0 transport |
246 | will resend the request when no reply has been received for longer than |
329 | will resend the request when no reply has been received for longer than |
247 | eight times the minimum (= expected) latency, assuming the request or |
330 | eight times the minimum (= expected) latency, assuming the request or |
248 | reply has been lost. |
331 | reply has been lost. |
249 | .Sp |
332 | .Sp |
250 | For congested links a higher value might be necessary (e.g. \f(CW30\fR). If the |
333 | For congested links a higher value might be necessary (e.g. \f(CW30\fR). If |
251 | link is very stable lower values (e.g. \f(CW2\fR) might work nicely. Values |
334 | the link is very stable lower values (e.g. \f(CW2\fR) might work |
252 | near or below \f(CW1\fR makes no sense whatsoever. |
335 | nicely. Values near or below \f(CW1\fR makes no sense whatsoever. |
253 | .Sp |
336 | .Sp |
254 | The default should be working ok for most links. |
337 | The default should be working \s-1OK\s0 for most links but will result in low |
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|
338 | throughput if packet loss is high. |
255 | .IP "if-up = relative-or-absolute-path" 4 |
339 | .IP "if-up = relative-or-absolute-path" 4 |
256 | .IX Item "if-up = relative-or-absolute-path" |
340 | .IX Item "if-up = relative-or-absolute-path" |
257 | Sets the path of a script that should be called immediately after the |
341 | Sets the path of a script that should be called immediately after the |
258 | network interface is initialized (but not neccessarily up). The following |
342 | network interface is initialized (but not necessarily up). The following |
259 | environment variables are passed to it (the values are just examples): |
343 | environment variables are passed to it (the values are just examples). |
|
|
344 | .Sp |
|
|
345 | Variables that have the same value on all nodes: |
260 | .RS 4 |
346 | .RS 4 |
261 | .IP "CONFBASE=/etc/gvpe" 4 |
347 | .IP "CONFBASE=/etc/gvpe" 4 |
262 | .IX Item "CONFBASE=/etc/gvpe" |
348 | .IX Item "CONFBASE=/etc/gvpe" |
263 | The configuration base directory. |
349 | The configuration base directory. |
264 | .IP "IFNAME=vpn0" 4 |
350 | .IP "IFNAME=vpn0" 4 |
265 | .IX Item "IFNAME=vpn0" |
351 | .IX Item "IFNAME=vpn0" |
266 | The interface to initialize. |
352 | The network interface to initialize. |
267 | .IP "MTU=1436" 4 |
|
|
268 | .IX Item "MTU=1436" |
|
|
269 | The \s-1MTU\s0 to set the interface to. You can use lower values (if done |
|
|
270 | consistently on all hosts), but this is usually ineffective. |
|
|
271 | .IP "MAC=fe:fd:80:00:00:01" 4 |
|
|
272 | .IX Item "MAC=fe:fd:80:00:00:01" |
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|
273 | The \s-1MAC\s0 address to set the interface to. The script *must* set the |
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274 | interface \s-1MAC\s0 to this value. You will most likely use one of these: |
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|
275 | .Sp |
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|
276 | .Vb 2 |
|
|
277 | \& ip link set $IFNAME address $MAC mtu $MTU up # GNU/Linux |
|
|
278 | \& ifconfig $IFNAME ether $MAC mtu $MTU up # FreeBSD |
|
|
279 | .Ve |
|
|
280 | .Sp |
|
|
281 | Please see the \f(CW\*(C`gvpe.osdep(5)\*(C'\fR manpage for platform-specific information. |
|
|
282 | .IP "IFTYPE=native # or tincd" 4 |
353 | .IP "IFTYPE=native # or tincd" 4 |
283 | .IX Item "IFTYPE=native # or tincd" |
354 | .IX Item "IFTYPE=native # or tincd" |
284 | .PD 0 |
355 | .PD 0 |
285 | .IP "IFSUBTYPE=linux # or freebsd, darwin etc.." 4 |
356 | .IP "IFSUBTYPE=linux # or freebsd, darwin etc.." 4 |
286 | .IX Item "IFSUBTYPE=linux # or freebsd, darwin etc.." |
357 | .IX Item "IFSUBTYPE=linux # or freebsd, darwin etc.." |
287 | .PD |
358 | .PD |
288 | The interface type (\f(CW\*(C`native\*(C'\fR or \f(CW\*(C`tincd\*(C'\fR) and the subtype (usually the os |
359 | The interface type (\f(CW\*(C`native\*(C'\fR or \f(CW\*(C`tincd\*(C'\fR) and the subtype (usually the |
289 | name in lowercase) that this gvpe was configured for. Can be used to select |
360 | \&\s-1OS\s0 name in lowercase) that this \s-1GVPE\s0 was configured for. Can be used to |
290 | the correct syntax to use for network-related commands. |
361 | select the correct syntax to use for network-related commands. |
|
|
362 | .IP "MTU=1436" 4 |
|
|
363 | .IX Item "MTU=1436" |
|
|
364 | The \s-1MTU\s0 to set the interface to. You can use lower values (if done |
|
|
365 | consistently on all nodes), but this is usually either inefficient or |
|
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366 | simply ineffective. |
|
|
367 | .IP "NODES=5" 4 |
|
|
368 | .IX Item "NODES=5" |
|
|
369 | The number of nodes in this \s-1GVPE\s0 network. |
|
|
370 | .RE |
|
|
371 | .RS 4 |
|
|
372 | .Sp |
|
|
373 | Variables that are node-specific and with values pertaining to the node |
|
|
374 | running this \s-1GVPE:\s0 |
|
|
375 | .IP "IFUPDATA=string" 4 |
|
|
376 | .IX Item "IFUPDATA=string" |
|
|
377 | The value of the configuration directive \f(CW\*(C`if\-up\-data\*(C'\fR. |
|
|
378 | .IP "MAC=fe:fd:80:00:00:01" 4 |
|
|
379 | .IX Item "MAC=fe:fd:80:00:00:01" |
|
|
380 | The \s-1MAC\s0 address the network interface has to use. |
|
|
381 | .Sp |
|
|
382 | Might be used to initialize interfaces on platforms where \s-1GVPE\s0 does not |
|
|
383 | do this automatically. Please see the \f(CW\*(C`gvpe.osdep(5)\*(C'\fR man page for |
|
|
384 | platform-specific information. |
291 | .IP "NODENAME=branch1" 4 |
385 | .IP "NODENAME=branch1" 4 |
292 | .IX Item "NODENAME=branch1" |
386 | .IX Item "NODENAME=branch1" |
293 | The nickname of the current node, as passed to the gvpe daemon. |
387 | The nickname of the node. |
294 | .IP "NODEID=1" 4 |
388 | .IP "NODEID=1" 4 |
295 | .IX Item "NODEID=1" |
389 | .IX Item "NODEID=1" |
296 | The numerical node id of the current node. The first node mentioned in the |
390 | The numerical node \s-1ID\s0 of the node running this instance of \s-1GVPE\s0. The first |
297 | config file gets \s-1ID\s0 1, the second \s-1ID\s0 2 and so on. |
391 | node mentioned in the config file gets \s-1ID\s0 1, the second \s-1ID\s0 2 and so on. |
298 | .RE |
392 | .RE |
299 | .RS 4 |
393 | .RS 4 |
300 | .Sp |
394 | .Sp |
|
|
395 | In addition, all node-specific variables (except \f(CW\*(C`NODEID\*(C'\fR) will be |
|
|
396 | available with a postfix of \f(CW\*(C`_nodeid\*(C'\fR, which contains the value for that |
|
|
397 | node, e.g. the \f(CW\*(C`MAC_1\*(C'\fR variable contains the \s-1MAC\s0 address of node #1, while |
|
|
398 | the \f(CW\*(C`NODENAME_22\*(C'\fR variable contains the name of node #22. |
|
|
399 | .Sp |
301 | Here is a simple if-up script: |
400 | Here is a simple if-up script: |
302 | .Sp |
401 | .Sp |
303 | .Vb 5 |
402 | .Vb 5 |
304 | \& #!/bin/sh |
403 | \& #!/bin/sh |
305 | \& ip link set $IFNAME address $MAC mtu $MTU up |
404 | \& ip link set $IFNAME up |
306 | \& [ $NODENAME = branch1 ] && ip addr add 10.0.0.1 dev $IFNAME |
405 | \& [ $NODENAME = branch1 ] && ip addr add 10.0.0.1 dev $IFNAME |
307 | \& [ $NODENAME = branch2 ] && ip addr add 10.1.0.1 dev $IFNAME |
406 | \& [ $NODENAME = branch2 ] && ip addr add 10.1.0.1 dev $IFNAME |
308 | \& ip route add 10.0.0.0/8 dev $IFNAME |
407 | \& ip route add 10.0.0.0/8 dev $IFNAME |
309 | .Ve |
408 | .Ve |
310 | .Sp |
409 | .Sp |
311 | More complicated examples (using routing to reduce arp traffic) can be |
410 | More complicated examples (using routing to reduce \s-1ARP\s0 traffic) can be |
312 | found in the etc/ subdirectory of the distribution. |
411 | found in the \fIetc/\fR subdirectory of the distribution. |
313 | .RE |
412 | .RE |
314 | .IP "ifname = devname" 4 |
413 | .IP "ifname = devname" 4 |
315 | .IX Item "ifname = devname" |
414 | .IX Item "ifname = devname" |
316 | Sets the tun interface name to the given name. The default is OS-specific |
415 | Sets the tun interface name to the given name. The default is OS-specific |
317 | and most probably something like \f(CW\*(C`tun0\*(C'\fR. |
416 | and most probably something like \f(CW\*(C`tun0\*(C'\fR. |
… | |
… | |
324 | the local node, try to set this to \f(CW\*(C`off\*(C'\fR and do an ifconfig down on the |
423 | the local node, try to set this to \f(CW\*(C`off\*(C'\fR and do an ifconfig down on the |
325 | device. |
424 | device. |
326 | .IP "ip-proto = numerical-ip-protocol" 4 |
425 | .IP "ip-proto = numerical-ip-protocol" 4 |
327 | .IX Item "ip-proto = numerical-ip-protocol" |
426 | .IX Item "ip-proto = numerical-ip-protocol" |
328 | Sets the protocol number to be used for the rawip protocol. This is a |
427 | Sets the protocol number to be used for the rawip protocol. This is a |
329 | global option because all hosts must use the same protocol, and since |
428 | global option because all nodes must use the same protocol, and since |
330 | there are no port numbers, you cannot easily run more than one gvpe |
429 | there are no port numbers, you cannot easily run more than one gvpe |
331 | instance using the same protocol, nor can you share the protocol with |
430 | instance using the same protocol, nor can you share the protocol with |
332 | other programs. |
431 | other programs. |
333 | .Sp |
432 | .Sp |
334 | The default is 47 (\s-1GRE\s0), which has a good chance of tunneling through |
433 | The default is 47 (\s-1GRE\s0), which has a good chance of tunneling |
335 | firewalls (but note that the rawip protocol is not \s-1GRE\s0 compatible). Other |
434 | through firewalls (but note that gvpe's rawip protocol is not \s-1GRE\s0 |
336 | common choices are 50 (\s-1IPSEC\s0, \s-1ESP\s0), 51 (\s-1IPSEC\s0, \s-1AH\s0), 4 (\s-1IPIP\s0 tunnels) or 98 |
435 | compatible). Other common choices are 50 (\s-1IPSEC\s0, \s-1ESP\s0), 51 (\s-1IPSEC\s0, \s-1AH\s0), 4 |
337 | (\s-1ENCAP\s0, rfc1241) |
436 | (\s-1IPIP\s0 tunnels) or 98 (\s-1ENCAP\s0, rfc1241). |
|
|
437 | .Sp |
|
|
438 | Many versions of Linux seem to have a bug that causes them to reorder |
|
|
439 | packets for some ip protocols (\s-1GRE\s0, \s-1ESP\s0) but not for others (\s-1AH\s0), so |
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|
440 | choose wisely (that is, use 51, \s-1AH\s0). |
338 | .IP "http-proxy-host = hostname/ip" 4 |
441 | .IP "http-proxy-host = hostname/ip" 4 |
339 | .IX Item "http-proxy-host = hostname/ip" |
442 | .IX Item "http-proxy-host = hostname/ip" |
340 | The \f(CW\*(C`http\-proxy\-*\*(C'\fR family of options are only available if gvpe was |
443 | The \f(CW\*(C`http\-proxy\-*\*(C'\fR family of options are only available if gvpe was |
341 | compiled with the \f(CW\*(C`\-\-enable\-http\-proxy\*(C'\fR option and enable tunneling of |
444 | compiled with the \f(CW\*(C`\-\-enable\-http\-proxy\*(C'\fR option and enable tunneling of |
342 | tcp connections through a http proxy server. |
445 | tcp connections through a http proxy server. |
… | |
… | |
344 | \&\f(CW\*(C`http\-proxy\-host\*(C'\fR and \f(CW\*(C`http\-proxy\-port\*(C'\fR should specify the hostname and |
447 | \&\f(CW\*(C`http\-proxy\-host\*(C'\fR and \f(CW\*(C`http\-proxy\-port\*(C'\fR should specify the hostname and |
345 | port number of the proxy server. See \f(CW\*(C`http\-proxy\-loginpw\*(C'\fR if your proxy |
448 | port number of the proxy server. See \f(CW\*(C`http\-proxy\-loginpw\*(C'\fR if your proxy |
346 | requires authentication. |
449 | requires authentication. |
347 | .Sp |
450 | .Sp |
348 | Please note that gvpe will still try to resolve all hostnames in the |
451 | Please note that gvpe will still try to resolve all hostnames in the |
349 | configuration file, so if you are behind a proxy without access to a dns |
452 | configuration file, so if you are behind a proxy without access to a \s-1DNS\s0 |
350 | server better use numerical \s-1IP\s0 addresses. |
453 | server better use numerical \s-1IP\s0 addresses. |
351 | .Sp |
454 | .Sp |
352 | To make best use of this option disable all protocols except tcp in your |
455 | To make best use of this option disable all protocols except \s-1TCP\s0 in your |
353 | config file and make sure your routers (or all other hosts) are listening |
456 | config file and make sure your routers (or all other nodes) are listening |
354 | on a port that the proxy allows (443, https, is a common choice). |
457 | on a port that the proxy allows (443, https, is a common choice). |
355 | .Sp |
458 | .Sp |
356 | If you have a router, connecting to it will suffice. Otherwise tcp must be |
459 | If you have a router, connecting to it will suffice. Otherwise \s-1TCP\s0 must be |
357 | enabled on all hosts. |
460 | enabled on all nodes. |
358 | .Sp |
461 | .Sp |
359 | Example: |
462 | Example: |
360 | .Sp |
463 | .Sp |
361 | .Vb 3 |
464 | .Vb 3 |
362 | \& http-proxy-host = proxy.example.com |
465 | \& http\-proxy\-host = proxy.example.com |
363 | \& http-proxy-port = 3128 # 8080 is another common choice |
466 | \& http\-proxy\-port = 3128 # 8080 is another common choice |
364 | \& http-proxy-auth = schmorp:grumbeere |
467 | \& http\-proxy\-auth = schmorp:grumbeere |
365 | .Ve |
468 | .Ve |
366 | .IP "http-proxy-port = proxy-tcp-port" 4 |
469 | .IP "http-proxy-port = proxy-tcp-port" 4 |
367 | .IX Item "http-proxy-port = proxy-tcp-port" |
470 | .IX Item "http-proxy-port = proxy-tcp-port" |
368 | The port where your proxy server listens. |
471 | The port where your proxy server listens. |
369 | .IP "http-proxy-auth = login:password" 4 |
472 | .IP "http-proxy-auth = login:password" 4 |
370 | .IX Item "http-proxy-auth = login:password" |
473 | .IX Item "http-proxy-auth = login:password" |
371 | The optional login and password used to authenticate to the proxy server, |
474 | The optional login and password used to authenticate to the proxy server, |
372 | seperated by a literal colon (\f(CW\*(C`:\*(C'\fR). Only basic authentication is |
475 | separated by a literal colon (\f(CW\*(C`:\*(C'\fR). Only basic authentication is |
373 | currently supported. |
476 | currently supported. |
374 | .IP "keepalive = seconds" 4 |
477 | .IP "keepalive = seconds" 4 |
375 | .IX Item "keepalive = seconds" |
478 | .IX Item "keepalive = seconds" |
376 | Sets the keepalive probe interval in seconds (default: \f(CW60\fR). After this |
479 | Sets the keepalive probe interval in seconds (default: \f(CW60\fR). After this |
377 | many seconds of inactivity the daemon will start to send keepalive probe |
480 | many seconds of inactivity the daemon will start to send keepalive probe |
378 | every 5 seconds until it receives a reply from the other end. If no reply |
481 | every 3 seconds until it receives a reply from the other end. If no reply |
379 | is received within 30 seconds, the peer is considered unreachable and the |
482 | is received within 15 seconds, the peer is considered unreachable and the |
380 | connection is closed. |
483 | connection is closed. |
381 | .IP "loglevel = noise|trace|debug|info|notice|warn|error|critical" 4 |
484 | .IP "loglevel = noise|trace|debug|info|notice|warn|error|critical" 4 |
382 | .IX Item "loglevel = noise|trace|debug|info|notice|warn|error|critical" |
485 | .IX Item "loglevel = noise|trace|debug|info|notice|warn|error|critical" |
383 | Set the logging level. Connection established messages are logged at level |
486 | Set the logging level. Connection established messages are logged at level |
384 | \&\f(CW\*(C`info\*(C'\fR, notable errors are logged with \f(CW\*(C`error\*(C'\fR. Default is \f(CW\*(C`info\*(C'\fR. |
487 | \&\f(CW\*(C`info\*(C'\fR, notable errors are logged with \f(CW\*(C`error\*(C'\fR. Default is \f(CW\*(C`info\*(C'\fR. |
385 | .IP "mtu = bytes" 4 |
488 | .IP "mtu = bytes" 4 |
386 | .IX Item "mtu = bytes" |
489 | .IX Item "mtu = bytes" |
387 | Sets the maximum \s-1MTU\s0 that should be used on outgoing packets (basically |
490 | Sets the maximum \s-1MTU\s0 that should be used on outgoing packets (basically |
388 | the \s-1MTU\s0 of the outgoing interface) The daemon will automatically calculate |
491 | the \s-1MTU\s0 of the outgoing interface) The daemon will automatically calculate |
389 | maximum overhead (e.g. udp header size, encryption blocksize...) and pass |
492 | maximum overhead (e.g. \s-1UDP\s0 header size, encryption blocksize...) and pass |
390 | this information to the \f(CW\*(C`if\-up\*(C'\fR script. |
493 | this information to the \f(CW\*(C`if\-up\*(C'\fR script. |
391 | .Sp |
494 | .Sp |
392 | Recommended values are 1500 (ethernet), 1492 (pppoe), 1472 (pptp). |
495 | Recommended values are 1500 (ethernet), 1492 (pppoe), 1472 (pptp). |
393 | .Sp |
496 | .Sp |
394 | This value must be the minimum of the mtu values of all hosts. |
497 | This value must be the minimum of the \s-1MTU\s0 values of all nodes. |
395 | .IP "node = nickname" 4 |
498 | .IP "nfmark = integer" 4 |
396 | .IX Item "node = nickname" |
499 | .IX Item "nfmark = integer" |
397 | Not really a config setting but introduces a node section. The nickname is |
500 | This advanced option, when set to a nonzero value (default: \f(CW0\fR), tries |
398 | used to select the right configuration section and must be passed as an |
501 | to set the netfilter mark (or fwmark) value on all sockets gvpe uses to |
399 | argument to the gvpe daemon. |
502 | send packets. |
|
|
503 | .Sp |
|
|
504 | This can be used to make gvpe use a different set of routing rules. For |
|
|
505 | example, on GNU/Linux, the \f(CW\*(C`if\-up\*(C'\fR could set \f(CW\*(C`nfmark\*(C'\fR to 1000 and then |
|
|
506 | put all routing rules into table \f(CW99\fR and then use an ip rule to make |
|
|
507 | gvpe traffic avoid that routing table, in effect routing normal traffic |
|
|
508 | via gvpe and gvpe traffic via the normal system routing tables: |
|
|
509 | .Sp |
|
|
510 | .Vb 1 |
|
|
511 | \& ip rule add not fwmark 1000 lookup 99 |
|
|
512 | .Ve |
400 | .IP "node-up = relative-or-absolute-path" 4 |
513 | .IP "node-up = relative-or-absolute-path" 4 |
401 | .IX Item "node-up = relative-or-absolute-path" |
514 | .IX Item "node-up = relative-or-absolute-path" |
402 | Sets a command (default: no script) that should be called whenever a |
515 | Sets a command (default: none) that should be called whenever a connection |
403 | connection is established (even on rekeying operations). In addition |
516 | is established (even on rekeying operations). Note that node\-up/down |
|
|
517 | scripts will be run asynchronously, but execution is serialised, so there |
|
|
518 | will only ever be one such script running. |
|
|
519 | .Sp |
404 | to the variables passed to \f(CW\*(C`if\-up\*(C'\fR scripts, the following environment |
520 | In addition to all the variables passed to \f(CW\*(C`if\-up\*(C'\fR scripts, the following |
405 | variables will be set: |
521 | environment variables will be set (values are just examples): |
406 | .RS 4 |
522 | .RS 4 |
407 | .IP "DESTNODE=branch2" 4 |
523 | .IP "DESTNODE=branch2" 4 |
408 | .IX Item "DESTNODE=branch2" |
524 | .IX Item "DESTNODE=branch2" |
409 | The name of the remote node. |
525 | The name of the remote node. |
410 | .IP "DESTID=2" 4 |
526 | .IP "DESTID=2" 4 |
411 | .IX Item "DESTID=2" |
527 | .IX Item "DESTID=2" |
412 | The node id of the remote node. |
528 | The node id of the remote node. |
|
|
529 | .IP "DESTSI=rawip/88.99.77.55:0" 4 |
|
|
530 | .IX Item "DESTSI=rawip/88.99.77.55:0" |
|
|
531 | The \*(L"socket info\*(R" of the target node, protocol dependent but usually in |
|
|
532 | the format protocol/ip:port. |
413 | .IP "DESTIP=188.13.66.8" 4 |
533 | .IP "DESTIP=188.13.66.8" 4 |
414 | .IX Item "DESTIP=188.13.66.8" |
534 | .IX Item "DESTIP=188.13.66.8" |
415 | The numerical \s-1IP\s0 address of the remote host (gvpe accepts connections from |
535 | The numerical \s-1IP\s0 address of the remote node (gvpe accepts connections from |
416 | everywhere, as long as the other host can authenticate itself). |
536 | everywhere, as long as the other node can authenticate itself). |
417 | .IP "DESTPORT=655 # deprecated" 4 |
537 | .IP "DESTPORT=655 # deprecated" 4 |
418 | .IX Item "DESTPORT=655 # deprecated" |
538 | .IX Item "DESTPORT=655 # deprecated" |
419 | The \s-1UDP\s0 port used by the other side. |
539 | The protocol port used by the other side, if applicable. |
420 | .IP "STATE=UP" 4 |
540 | .IP "STATE=up" 4 |
421 | .IX Item "STATE=UP" |
541 | .IX Item "STATE=up" |
422 | Node-up scripts get called with STATE=UP, node-down scripts get called |
542 | Node-up scripts get called with STATE=up, node-change scripts get called |
423 | with STATE=DOWN. |
543 | with STATE=change and node-down scripts get called with STATE=down. |
424 | .RE |
544 | .RE |
425 | .RS 4 |
545 | .RS 4 |
426 | .Sp |
546 | .Sp |
427 | Here is a nontrivial example that uses nsupdate to update the name => ip |
547 | Here is a nontrivial example that uses nsupdate to update the name => ip |
428 | mapping in some dns zone: |
548 | mapping in some \s-1DNS\s0 zone: |
429 | .Sp |
549 | .Sp |
430 | .Vb 6 |
550 | .Vb 6 |
431 | \& #!/bin/sh |
551 | \& #!/bin/sh |
432 | \& { |
552 | \& { |
433 | \& echo update delete $DESTNODE.lowttl.example.net. a |
553 | \& echo update delete $DESTNODE.lowttl.example.net. a |
434 | \& echo update add $DESTNODE.lowttl.example.net. 1 in a $DESTIP |
554 | \& echo update add $DESTNODE.lowttl.example.net. 1 in a $DESTIP |
435 | \& echo |
555 | \& echo |
436 | \& } | nsupdate -d -k $CONFBASE:key.example.net. |
556 | \& } | nsupdate \-d \-k $CONFBASE:key.example.net. |
437 | .Ve |
557 | .Ve |
438 | .RE |
558 | .RE |
|
|
559 | .IP "node-change = relative-or-absolute-path" 4 |
|
|
560 | .IX Item "node-change = relative-or-absolute-path" |
|
|
561 | Same as \f(CW\*(C`node\-change\*(C'\fR, but gets called whenever something about a |
|
|
562 | connection changes (such as the source \s-1IP\s0 address). |
439 | .IP "node-down = relative-or-absolute-path" 4 |
563 | .IP "node-down = relative-or-absolute-path" 4 |
440 | .IX Item "node-down = relative-or-absolute-path" |
564 | .IX Item "node-down = relative-or-absolute-path" |
441 | Same as \f(CW\*(C`node\-up\*(C'\fR, but gets called whenever a connection is lost. |
565 | Same as \f(CW\*(C`node\-up\*(C'\fR, but gets called whenever a connection is lost. |
442 | .IP "pid-file = path" 4 |
566 | .IP "pid-file = path" 4 |
443 | .IX Item "pid-file = path" |
567 | .IX Item "pid-file = path" |
444 | The path to the pid file to check and create |
568 | The path to the pid file to check and create |
445 | (default: \f(CW\*(C`LOCALSTATEDIR/run/gvpe.pid\*(C'\fR). |
569 | (default: \f(CW\*(C`LOCALSTATEDIR/run/gvpe.pid\*(C'\fR). The first \f(CW%s\fR is replaced by |
|
|
570 | the nodename \- any other use of \f(CW\*(C`%\*(C'\fR must be written as \f(CW\*(C`%%\*(C'\fR. |
446 | .IP "private-key = relative-path-to-key" 4 |
571 | .IP "private-key = relative-path-to-key" 4 |
447 | .IX Item "private-key = relative-path-to-key" |
572 | .IX Item "private-key = relative-path-to-key" |
448 | Sets the path (relative to the config directory) to the private key |
573 | Sets the path (relative to the config directory) to the private key |
449 | (default: \f(CW\*(C`hostkey\*(C'\fR). This is a printf format string so every \f(CW\*(C`%\*(C'\fR must |
574 | (default: \f(CW\*(C`hostkey\*(C'\fR). This is a printf format string so every \f(CW\*(C`%\*(C'\fR must |
450 | be doubled. A single \f(CW%s\fR is replaced by the hostname, so you could |
575 | be doubled. A single \f(CW%s\fR is replaced by the hostname, so you could |
451 | use paths like \f(CW\*(C`hostkeys/%s\*(C'\fR to fetch the files at the location where |
576 | use paths like \f(CW\*(C`hostkeys/%s\*(C'\fR to fetch the files at the location where |
452 | \&\f(CW\*(C`gvpectrl\*(C'\fR puts them. |
577 | \&\f(CW\*(C`gvpectrl\*(C'\fR puts them. |
453 | .Sp |
578 | .Sp |
454 | Since only the private key file of the current node is used and the |
579 | Since only the private key file of the current node is used and the |
455 | private key file should be kept secret per-host to avoid spoofings, it is |
580 | private key file should be kept secret per-node to avoid spoofing, it is |
456 | not recommended to use this feature. |
581 | not recommended to use this feature. |
457 | .IP "rekey = seconds" 4 |
582 | .IP "rekey = seconds" 4 |
458 | .IX Item "rekey = seconds" |
583 | .IX Item "rekey = seconds" |
459 | Sets the rekeying interval in seconds (default: \f(CW3600\fR). Connections are |
584 | Sets the rekeying interval in seconds (default: \f(CW3607\fR). Connections are |
460 | reestablished every \f(CW\*(C`rekey\*(C'\fR seconds. |
585 | reestablished every \f(CW\*(C`rekey\*(C'\fR seconds, making them use a new encryption |
|
|
586 | key. |
|
|
587 | .IP "seed-device = path" 4 |
|
|
588 | .IX Item "seed-device = path" |
|
|
589 | The random device used to initially and regularly seed the random |
|
|
590 | number generator (default: \fI/dev/urandom\fR). Randomness is of paramount |
|
|
591 | importance to the security of the algorithms used in gvpe. |
|
|
592 | .Sp |
|
|
593 | On program start and every seed-interval, gvpe will read 64 octets. |
|
|
594 | .Sp |
|
|
595 | Setting this path to the empty string will disable this functionality |
|
|
596 | completely (the underlying crypto library will likely look for entropy |
|
|
597 | sources on it's own though, so not all is lost). |
|
|
598 | .IP "seed-interval = seconds" 4 |
|
|
599 | .IX Item "seed-interval = seconds" |
|
|
600 | The number of seconds between reseeds of the random number generator |
|
|
601 | (default: \f(CW3613\fR). A value of \f(CW0\fR disables this regular reseeding. |
|
|
602 | .IP "serial = string" 4 |
|
|
603 | .IX Item "serial = string" |
|
|
604 | The configuration serial number. This can be any string up to 16 bytes |
|
|
605 | length. Only when the serial matches on both sides of a conenction will |
|
|
606 | the connection succeed. This is \fInot\fR a security mechanism and eay to |
|
|
607 | spoof, this mechanism exists to alert users that their config is outdated. |
|
|
608 | .Sp |
|
|
609 | It's recommended to specify this is a date string such as \f(CW\*(C`2013\-05\-05\*(C'\fR or |
|
|
610 | \&\f(CW\*(C`20121205084417).\*(C'\fR |
|
|
611 | .Sp |
|
|
612 | The exact algorithm is as this: if a connection request is received form a |
|
|
613 | node with an identical serial, then it succeeds normally. |
|
|
614 | .Sp |
|
|
615 | If the remote serial is lower than the local serial, it is ignored. |
|
|
616 | .Sp |
|
|
617 | If the remote serial is higher than the local serial, a warning message is |
|
|
618 | logged. |
461 | .Sh "\s-1NODE\s0 \s-1SPECIFIC\s0 \s-1SETTINGS\s0" |
619 | .SS "\s-1NODE\s0 \s-1SPECIFIC\s0 \s-1SETTINGS\s0" |
462 | .IX Subsection "NODE SPECIFIC SETTINGS" |
620 | .IX Subsection "NODE SPECIFIC SETTINGS" |
463 | The following settings are node\-specific, that is, every node can have |
621 | The following settings are node-specific, that is, every node can have |
464 | different settings, even within the same gvpe instance. Settings that are |
622 | different settings, even within the same gvpe instance. Settings that are |
465 | executed before the first node section set the defaults, settings that are |
623 | set before the first node section set the defaults, settings that are |
466 | executed within a node section only apply to the given node. |
624 | set within a node section only apply to the given node. |
|
|
625 | .IP "allow-direct = nodename" 4 |
|
|
626 | .IX Item "allow-direct = nodename" |
|
|
627 | Allow direct connections to this node. See \f(CW\*(C`deny\-direct\*(C'\fR for more info. |
467 | .IP "compress = yes|true|on | no|false|off" 4 |
628 | .IP "compress = yes|true|on | no|false|off" 4 |
468 | .IX Item "compress = yes|true|on | no|false|off" |
629 | .IX Item "compress = yes|true|on | no|false|off" |
|
|
630 | For the current node, this specified whether it will accept compressed |
|
|
631 | packets, and for all other nodes, this specifies whether to try to |
469 | Wether to compress data packets sent to this host (default: \f(CW\*(C`yes\*(C'\fR). |
632 | compress data packets sent to this node (default: \f(CW\*(C`yes\*(C'\fR). Compression is |
470 | Compression is really cheap even on slow computers and has no size |
633 | really cheap even on slow computers, has no size overhead at all and will |
471 | overhead at all, so enabling this is a good idea. |
634 | only be used when the other side supports compression, so enabling this is |
|
|
635 | often a good idea. |
472 | .IP "connect = ondemand | never | always | disabled" 4 |
636 | .IP "connect = ondemand | never | always | disabled" 4 |
473 | .IX Item "connect = ondemand | never | always | disabled" |
637 | .IX Item "connect = ondemand | never | always | disabled" |
474 | Sets the connect mode (default: \f(CW\*(C`always\*(C'\fR). It can be \f(CW\*(C`always\*(C'\fR (always |
638 | Sets the connect mode (default: \f(CW\*(C`always\*(C'\fR). It can be \f(CW\*(C`always\*(C'\fR (always |
475 | try to establish and keep a connection to the given host), \f(CW\*(C`never\*(C'\fR |
639 | try to establish and keep a connection to the given node), \f(CW\*(C`never\*(C'\fR |
476 | (never initiate a connection to the given host, but accept connections), |
640 | (never initiate a connection to the given host, but accept connections), |
477 | \&\f(CW\*(C`ondemand\*(C'\fR (try to establish a connection on the first packet sent, and |
641 | \&\f(CW\*(C`ondemand\*(C'\fR (try to establish a connection when there are outstanding |
478 | take it down after the keepalive interval) or \f(CW\*(C`disabled\*(C'\fR (node is bad, |
642 | packets in the queue and take it down after the keepalive interval) or |
479 | don't talk to it). |
643 | \&\f(CW\*(C`disabled\*(C'\fR (node is bad, don't talk to it). |
|
|
644 | .Sp |
|
|
645 | Routers will automatically be forced to \f(CW\*(C`always\*(C'\fR unless they are |
|
|
646 | \&\f(CW\*(C`disabled\*(C'\fR, to ensure all nodes can talk to each other. |
|
|
647 | .IP "deny-direct = nodename | *" 4 |
|
|
648 | .IX Item "deny-direct = nodename | *" |
|
|
649 | Deny direct connections to the specified node (or all nodes when \f(CW\*(C`*\*(C'\fR |
|
|
650 | is given). Only one node can be specified, but you can use multiple |
|
|
651 | \&\f(CW\*(C`allow\-direct\*(C'\fR and \f(CW\*(C`deny\-direct\*(C'\fR statements. This only makes sense in |
|
|
652 | networks with routers, as routers are required for indirect connections. |
|
|
653 | .Sp |
|
|
654 | Sometimes, a node cannot reach some other nodes for reasons of network |
|
|
655 | connectivity. For example, a node behind a firewall that only allows |
|
|
656 | connections to/from a single other node in the network. In this case one |
|
|
657 | should specify \f(CW\*(C`deny\-direct = *\*(C'\fR and \f(CW\*(C`allow\-direct = othernodename\*(C'\fR (the other |
|
|
658 | node \fImust\fR be a router for this to work). |
|
|
659 | .Sp |
|
|
660 | The algorithm to check whether a connection may be direct is as follows: |
|
|
661 | .Sp |
|
|
662 | 1. Other node mentioned in an \f(CW\*(C`allow\-direct\*(C'\fR? If yes, allow the connection. |
|
|
663 | .Sp |
|
|
664 | 2. Other node mentioned in a \f(CW\*(C`deny\-direct\*(C'\fR? If yes, deny direct connections. |
|
|
665 | .Sp |
|
|
666 | 3. Allow the connection. |
|
|
667 | .Sp |
|
|
668 | That is, \f(CW\*(C`allow\-direct\*(C'\fR takes precedence over \f(CW\*(C`deny\-direct\*(C'\fR. |
|
|
669 | .Sp |
|
|
670 | The check is done in both directions, i.e. both nodes must allow a direct |
|
|
671 | connection before one is attempted, so you only need to specify connect |
|
|
672 | limitations on one node. |
480 | .IP "dns-domain = domain-suffix" 4 |
673 | .IP "dns-domain = domain-suffix" 4 |
481 | .IX Item "dns-domain = domain-suffix" |
674 | .IX Item "dns-domain = domain-suffix" |
482 | The \s-1DNS\s0 domain suffix that points to the \s-1DNS\s0 tunnel server for this node. |
675 | The \s-1DNS\s0 domain suffix that points to the \s-1DNS\s0 tunnel server for this node. |
483 | .Sp |
676 | .Sp |
484 | The domain must point to a \s-1NS\s0 record that points to the \fIdns-hostname\fR, |
677 | The domain must point to a \s-1NS\s0 record that points to the \fIdns-hostname\fR, |
485 | i.e. |
678 | i.e. |
486 | .Sp |
679 | .Sp |
487 | .Vb 2 |
680 | .Vb 2 |
488 | \& dns-domainname = tunnel.example.net |
681 | \& dns\-domainname = tunnel.example.net |
489 | \& dns-hostname = tunnel-server.example.net |
682 | \& dns\-hostname = tunnel\-server.example.net |
490 | .Ve |
683 | .Ve |
491 | .Sp |
684 | .Sp |
492 | Corresponds to the following \s-1DNS\s0 entries in the \f(CW\*(C`example.net\*(C'\fR domain: |
685 | Corresponds to the following \s-1DNS\s0 entries in the \f(CW\*(C`example.net\*(C'\fR domain: |
493 | .Sp |
686 | .Sp |
494 | .Vb 2 |
687 | .Vb 2 |
495 | \& tunnel.example.net. NS tunnel-server.example.net. |
688 | \& tunnel.example.net. NS tunnel\-server.example.net. |
496 | \& tunnel-server.example.net. A 13.13.13.13 |
689 | \& tunnel\-server.example.net. A 13.13.13.13 |
497 | .Ve |
690 | .Ve |
498 | .IP "dns-hostname = hostname/ip" 4 |
691 | .IP "dns-hostname = hostname/ip" 4 |
499 | .IX Item "dns-hostname = hostname/ip" |
692 | .IX Item "dns-hostname = hostname/ip" |
500 | The address to bind the \s-1DNS\s0 tunnel socket to, similar to the \f(CW\*(C`hostname\*(C'\fR, |
693 | The address to bind the \s-1DNS\s0 tunnel socket to, similar to the \f(CW\*(C`hostname\*(C'\fR, |
501 | but for the \s-1DNS\s0 tunnel protocol only. Default: \f(CW0.0.0.0\fR, but that might |
694 | but for the \s-1DNS\s0 tunnel protocol only. Default: \f(CW0.0.0.0\fR, but that might |
… | |
… | |
513 | was compiled using the \f(CW\*(C`\-\-enable\-dns\*(C'\fR option. |
706 | was compiled using the \f(CW\*(C`\-\-enable\-dns\*(C'\fR option. |
514 | .IP "enable-icmp = yes|true|on | no|false|off" 4 |
707 | .IP "enable-icmp = yes|true|on | no|false|off" 4 |
515 | .IX Item "enable-icmp = yes|true|on | no|false|off" |
708 | .IX Item "enable-icmp = yes|true|on | no|false|off" |
516 | See \fIgvpe.protocol\fR\|(7) for a description of the \s-1ICMP\s0 transport protocol. |
709 | See \fIgvpe.protocol\fR\|(7) for a description of the \s-1ICMP\s0 transport protocol. |
517 | .Sp |
710 | .Sp |
518 | Enable the \s-1ICMP\s0 transport using icmp packets of type \f(CW\*(C`icmp\-type\*(C'\fR on this |
711 | Enable the \s-1ICMP\s0 transport using \s-1ICMP\s0 packets of type \f(CW\*(C`icmp\-type\*(C'\fR on this |
519 | node. |
712 | node. |
520 | .IP "enable-rawip = yes|true|on | no|false|off" 4 |
713 | .IP "enable-rawip = yes|true|on | no|false|off" 4 |
521 | .IX Item "enable-rawip = yes|true|on | no|false|off" |
714 | .IX Item "enable-rawip = yes|true|on | no|false|off" |
522 | See \fIgvpe.protocol\fR\|(7) for a description of the \s-1RAW\s0 \s-1IP\s0 transport protocol. |
715 | See \fIgvpe.protocol\fR\|(7) for a description of the \s-1RAW\s0 \s-1IP\s0 transport protocol. |
523 | .Sp |
716 | .Sp |
… | |
… | |
532 | when gvpe was compiled using the \f(CW\*(C`\-\-enable\-tcp\*(C'\fR option. |
725 | when gvpe was compiled using the \f(CW\*(C`\-\-enable\-tcp\*(C'\fR option. |
533 | .IP "enable-udp = yes|true|on | no|false|off" 4 |
726 | .IP "enable-udp = yes|true|on | no|false|off" 4 |
534 | .IX Item "enable-udp = yes|true|on | no|false|off" |
727 | .IX Item "enable-udp = yes|true|on | no|false|off" |
535 | See \fIgvpe.protocol\fR\|(7) for a description of the \s-1UDP\s0 transport protocol. |
728 | See \fIgvpe.protocol\fR\|(7) for a description of the \s-1UDP\s0 transport protocol. |
536 | .Sp |
729 | .Sp |
537 | Enable the UDPv4 transport using the \f(CW\*(C`udp\-port\*(C'\fR port (default: \f(CW\*(C`no\*(C'\fR, |
730 | Enable the UDPv4 transport using the \f(CW\*(C`udp\-port\*(C'\fR port (default: \f(CW\*(C`no\*(C'\fR). |
538 | unless no other protocol is enabled for a node, in which case this |
731 | .IP "hostname = hostname | ip [can not be defaulted]" 4 |
539 | protocol is enabled automatically). |
732 | .IX Item "hostname = hostname | ip [can not be defaulted]" |
|
|
733 | Forces the address of this node to be set to the given \s-1DNS\s0 hostname or \s-1IP\s0 |
|
|
734 | address. It will be resolved before each connect request, so dyndns should |
|
|
735 | work fine. If this setting is not specified and a router is available, |
|
|
736 | then the router will be queried for the address of this node. Otherwise, |
|
|
737 | the connection attempt will fail. |
540 | .Sp |
738 | .Sp |
541 | \&\s-1NOTE:\s0 Please specify \f(CW\*(C`enable\-udp = yes\*(C'\fR if you want t use it even though |
739 | Note that \s-1DNS\s0 resolving is done synchronously, pausing the daemon. If that |
542 | it might get switched on automatically, as some future version might |
740 | is an issue you need to specify \s-1IP\s0 addresses. |
543 | default to another default protocol. |
|
|
544 | .IP "icmp-type = integer" 4 |
741 | .IP "icmp-type = integer" 4 |
545 | .IX Item "icmp-type = integer" |
742 | .IX Item "icmp-type = integer" |
546 | Sets the type value to be used for outgoing (and incoming) packets sent |
743 | Sets the type value to be used for outgoing (and incoming) packets sent |
547 | via the \s-1ICMP\s0 transport. |
744 | via the \s-1ICMP\s0 transport. |
548 | .Sp |
745 | .Sp |
549 | The default is \f(CW0\fR (which is \f(CW\*(C`echo\-reply\*(C'\fR, also known as |
746 | The default is \f(CW0\fR (which is \f(CW\*(C`echo\-reply\*(C'\fR, also known as |
550 | \&\*(L"ping\-replies\*(R"). Other useful values include \f(CW8\fR (\f(CW\*(C`echo\-request\*(C'\fR, a.k.a. |
747 | \&\*(L"ping-reply\*(R"). Other useful values include \f(CW8\fR (\f(CW\*(C`echo\-request\*(C'\fR, a.k.a. |
551 | \&\*(L"ping\*(R") and \f(CW11\fR (\f(CW\*(C`time\-exceeded\*(C'\fR), but any 8\-bit value can be used. |
748 | \&\*(L"ping\*(R") and \f(CW11\fR (\f(CW\*(C`time\-exceeded\*(C'\fR), but any 8\-bit value can be used. |
|
|
749 | .IP "if-up-data = value" 4 |
|
|
750 | .IX Item "if-up-data = value" |
|
|
751 | The value specified using this directive will be passed to the \f(CW\*(C`if\-up\*(C'\fR |
|
|
752 | script in the environment variable \f(CW\*(C`IFUPDATA\*(C'\fR. |
552 | .IP "inherit-tos = yes|true|on | no|false|off" 4 |
753 | .IP "inherit-tos = yes|true|on | no|false|off" 4 |
553 | .IX Item "inherit-tos = yes|true|on | no|false|off" |
754 | .IX Item "inherit-tos = yes|true|on | no|false|off" |
554 | Wether to inherit the \s-1TOS\s0 settings of packets sent to the tunnel when |
755 | Whether to inherit the \s-1TOS\s0 settings of packets sent to the tunnel when |
555 | sending packets to this node (default: \f(CW\*(C`yes\*(C'\fR). If set to \f(CW\*(C`yes\*(C'\fR then |
756 | sending packets to this node (default: \f(CW\*(C`yes\*(C'\fR). If set to \f(CW\*(C`yes\*(C'\fR then |
556 | outgoing tunnel packets will have the same \s-1TOS\s0 setting as the packets sent |
757 | outgoing tunnel packets will have the same \s-1TOS\s0 setting as the packets sent |
557 | to the tunnel device, which is usually what you want. |
758 | to the tunnel device, which is usually what you want. |
|
|
759 | .IP "low-power = yes|true|on | no|false|off" 4 |
|
|
760 | .IX Item "low-power = yes|true|on | no|false|off" |
|
|
761 | If true, designates a node as a low-power node. Low-power nodes use |
|
|
762 | larger timeouts and try to reduce cpu time. Other nodes talking to a |
|
|
763 | low-power node will also use larger timeouts, and will use less aggressive |
|
|
764 | optimisations, in the hope of reducing load. Security is not compromised. |
|
|
765 | .Sp |
|
|
766 | The typical low-power node would be a mobile phone, where wakeups and |
|
|
767 | encryption can significantly increase power drain. |
558 | .IP "max-retry = positive-number" 4 |
768 | .IP "max-retry = positive-number" 4 |
559 | .IX Item "max-retry = positive-number" |
769 | .IX Item "max-retry = positive-number" |
560 | The maximum interval in seconds (default: \f(CW3600\fR, one hour) between |
770 | The maximum interval in seconds (default: \f(CW3600\fR, one hour) between |
561 | retries to establish a connection to this node. When a connection cannot |
771 | retries to establish a connection to this node. When a connection cannot |
562 | be established, gvpe uses exponential backoff capped at this value. It's |
772 | be established, gvpe uses exponential back-off capped at this value. It's |
563 | sometimes useful to set this to a much lower value (e.g. \f(CW120\fR) on |
773 | sometimes useful to set this to a much lower value (e.g. \f(CW120\fR) on |
564 | connections to routers that usually are stable but sometimes are down, to |
774 | connections to routers that usually are stable but sometimes are down, to |
565 | assure quick reconnections even after longer downtimes. |
775 | assure quick reconnections even after longer downtimes. |
|
|
776 | .IP "max-ttl = seconds" 4 |
|
|
777 | .IX Item "max-ttl = seconds" |
|
|
778 | Expire packets that couldn't be sent after this many seconds |
|
|
779 | (default: \f(CW60\fR). Gvpe will normally queue packets for a node without an |
|
|
780 | active connection, in the hope of establishing a connection soon. This |
|
|
781 | value specifies the maximum lifetime a packet will stay in the queue, if a |
|
|
782 | packet gets older, it will be thrown away. |
|
|
783 | .IP "max-queue = positive\-number>=1" 4 |
|
|
784 | .IX Item "max-queue = positive-number>=1" |
|
|
785 | The maximum number of packets that will be queued (default: \f(CW512\fR) |
|
|
786 | for this node. If more packets are sent then earlier packets will be |
|
|
787 | expired. See \f(CW\*(C`max\-ttl\*(C'\fR, above. |
566 | .IP "router-priority = 0 | 1 | positive\-number>=2" 4 |
788 | .IP "router-priority = 0 | 1 | positive\-number>=2" 4 |
567 | .IX Item "router-priority = 0 | 1 | positive-number>=2" |
789 | .IX Item "router-priority = 0 | 1 | positive-number>=2" |
568 | Sets the router priority of the given host (default: \f(CW0\fR, disabled). If |
790 | Sets the router priority of the given node (default: \f(CW0\fR, disabled). |
569 | some host tries to connect to another host without a hostname, it asks |
|
|
570 | the router host for it's \s-1IP\s0 address. The router host is the one with the |
|
|
571 | highest priority larger than \f(CW1\fR that is currently reachable. |
|
|
572 | .Sp |
791 | .Sp |
573 | Make sure all hosts always connect (\f(CW\*(C`connect = always\*(C'\fR) to the router |
792 | If some node tries to connect to another node but it doesn't have a |
574 | hosts, otherwise connecting to them might be impossible. |
793 | hostname, it asks a router node for it's \s-1IP\s0 address. The router node |
|
|
794 | chosen is the one with the highest priority larger than \f(CW1\fR that is |
|
|
795 | currently reachable. This is called a \fImediated\fR connection, as the |
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796 | connection itself will still be direct, but it uses another node to |
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797 | mediate between the two nodes. |
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798 | .Sp |
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799 | The value \f(CW0\fR disables routing, that means if the node receives a packet |
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800 | not for itself it will not forward it but instead drop it. |
575 | .Sp |
801 | .Sp |
576 | The special value \f(CW1\fR allows other hosts to route through the router |
802 | The special value \f(CW1\fR allows other hosts to route through the router |
577 | host, but they will never route through it by default. The value \f(CW0\fR |
803 | host, but they will never route through it by default (i.e. the config |
578 | disables routing. The idea behind this is that some hosts can, if |
804 | file of another node needs to specify a router priority higher than one |
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805 | to choose such a node for routing). |
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806 | .Sp |
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807 | The idea behind this is that some hosts can, if required, bump the |
579 | required, bump the \f(CW\*(C`router\-priority\*(C'\fR setting to higher than \f(CW1\fR in their |
808 | \&\f(CW\*(C`router\-priority\*(C'\fR setting to higher than \f(CW1\fR in their local config to |
580 | local config to route through specific hosts. If \f(CW\*(C`router\-priority\*(C'\fR is |
809 | route through specific hosts. If \f(CW\*(C`router\-priority\*(C'\fR is \f(CW0\fR, then routing |
581 | \&\f(CW0\fR, then routing will be refused, so \f(CW1\fR serves as a \*(L"enable, but do |
810 | will be refused, so \f(CW1\fR serves as a \*(L"enable, but do not use by default\*(R" |
582 | not use by default\*(R" switch. |
811 | switch. |
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812 | .Sp |
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813 | Nodes with \f(CW\*(C`router\-priority\*(C'\fR set to \f(CW2\fR or higher will always be forced |
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814 | to \f(CW\*(C`connect\*(C'\fR = \f(CW\*(C`always\*(C'\fR (unless they are \f(CW\*(C`disabled\*(C'\fR). |
583 | .IP "tcp-port = port-number" 4 |
815 | .IP "tcp-port = port-number" 4 |
584 | .IX Item "tcp-port = port-number" |
816 | .IX Item "tcp-port = port-number" |
585 | Similar to \f(CW\*(C`udp\-port\*(C'\fR (default: \f(CW655\fR), but sets the \s-1TCP\s0 port number. |
817 | Similar to \f(CW\*(C`udp\-port\*(C'\fR (default: \f(CW655\fR), but sets the \s-1TCP\s0 port number. |
586 | .IP "udp-port = port-number" 4 |
818 | .IP "udp-port = port-number" 4 |
587 | .IX Item "udp-port = port-number" |
819 | .IX Item "udp-port = port-number" |
588 | Sets the port number used by the \s-1UDP\s0 protocol (default: \f(CW655\fR, not |
820 | Sets the port number used by the \s-1UDP\s0 protocol (default: \f(CW655\fR, not |
589 | officially assigned by \s-1IANA\s0!). |
821 | officially assigned by \s-1IANA\s0!). |
590 | .SH "CONFIG DIRECTORY LAYOUT" |
822 | .SH "CONFIG DIRECTORY LAYOUT" |
591 | .IX Header "CONFIG DIRECTORY LAYOUT" |
823 | .IX Header "CONFIG DIRECTORY LAYOUT" |
592 | The default (or recommended) directory layout for the config directory is: |
824 | The default (or recommended) directory layout for the config directory is: |
593 | .IP "\(bu" 4 |
825 | .IP "gvpe.conf" 4 |
594 | .IX Xref "gvpe.conf" |
826 | .IX Item "gvpe.conf" |
595 | The config file. |
827 | The config file. |
596 | .IP "\(bu" 4 |
828 | .IP "if-up" 4 |
597 | .IX Xref "if-up" |
829 | .IX Item "if-up" |
598 | The if-up script |
830 | The if-up script |
599 | .IP "," 4 |
831 | .IP "node-up, node-down" 4 |
600 | .IX Xref "node-up node-down" |
832 | .IX Item "node-up, node-down" |
601 | If used the node up or node-down scripts. |
833 | If used the node up or node-down scripts. |
602 | .IP "\(bu" 4 |
834 | .IP "hostkey" 4 |
603 | .IX Xref "hostkey" |
835 | .IX Item "hostkey" |
604 | The private key (taken from \f(CW\*(C`hostkeys/nodename\*(C'\fR) of the current host. |
836 | The (default path of the) private key of the current host. |
605 | .IP "\(bu" 4 |
837 | .IP "pubkey/nodename" 4 |
606 | .IX Xref "pubkey nodename" |
838 | .IX Item "pubkey/nodename" |
607 | The public keys of the other nodes, one file per node. |
839 | The public keys of the other nodes, one file per node. |
608 | .SH "SEE ALSO" |
840 | .SH "SEE ALSO" |
609 | .IX Header "SEE ALSO" |
841 | .IX Header "SEE ALSO" |
610 | \&\fIgvpe\fR\|(5), \fIgvpe\fR\|(8), \fIgvpectrl\fR\|(8). |
842 | \&\fIgvpe\fR\|(5), \fIgvpe\fR\|(8), \fIgvpectrl\fR\|(8). |
611 | .SH "AUTHOR" |
843 | .SH "AUTHOR" |
612 | .IX Header "AUTHOR" |
844 | .IX Header "AUTHOR" |
613 | Marc Lehmann <gvpe@plan9.de> |
845 | Marc Lehmann <gvpe@schmorp.de> |
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|
846 | .SH "POD ERRORS" |
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|
847 | .IX Header "POD ERRORS" |
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|
848 | Hey! \fBThe above document had some coding errors, which are explained below:\fR |
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849 | .IP "Around line 516:" 4 |
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850 | .IX Item "Around line 516:" |
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851 | Unterminated C<...> sequence |