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131 | .IX Title "GVPE.CONF 5" |
131 | .IX Title "GVPE.CONF 5" |
132 | .TH GVPE.CONF 5 "2005-03-14" "1.8" "GNU Virtual Private Ethernet" |
132 | .TH GVPE.CONF 5 "2005-06-21" "1.9" "GNU Virtual Private Ethernet" |
133 | .SH "NAME" |
133 | .SH "NAME" |
134 | gvpe.conf \- configuration file for the GNU VPE daemon |
134 | gvpe.conf \- configuration file for the GNU VPE daemon |
135 | .SH "SYNOPSIS" |
135 | .SH "SYNOPSIS" |
136 | .IX Header "SYNOPSIS" |
136 | .IX Header "SYNOPSIS" |
137 | .Vb 3 |
137 | .Vb 3 |
… | |
… | |
158 | .SH "DESCRIPTION" |
158 | .SH "DESCRIPTION" |
159 | .IX Header "DESCRIPTION" |
159 | .IX Header "DESCRIPTION" |
160 | The gvpe config file consists of a series of lines that contain \f(CW\*(C`variable |
160 | 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 |
161 | = 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 |
162 | 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 |
163 | 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. |
164 | values, but not within the variable names or values themselves. |
165 | .PP |
165 | .PP |
166 | The only exception to the above is the \*(L"on\*(R" directive that can prefix any |
166 | The only exception to the above is the \*(L"on\*(R" directive that can prefix any |
167 | \&\f(CW\*(C`name = value\*(C'\fR setting and will only \*(L"execute\*(R" it on the named node, or |
167 | \&\f(CW\*(C`name = value\*(C'\fR setting and will only \*(L"execute\*(R" it on the named node, or |
168 | (if the nodename starts with \*(L"!\*(R") on all nodes except the named one. |
168 | (if the nodename starts with \*(L"!\*(R") on all nodes except the named one. |
169 | .PP |
169 | .PP |
… | |
… | |
202 | (default: \f(CW127.0.0.1\fR, changing it is highly recommended). |
202 | (default: \f(CW127.0.0.1\fR, changing it is highly recommended). |
203 | .IP "dns-forw-port = port-number" 4 |
203 | .IP "dns-forw-port = port-number" 4 |
204 | .IX Item "dns-forw-port = port-number" |
204 | .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, |
205 | 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). |
206 | which is fine in most cases). |
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207 | .IP "dns-max-outstanding = integer-number-of-requests" 4 |
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208 | .IX Item "dns-max-outstanding = integer-number-of-requests" |
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209 | The maximum number of outstanding \s-1DNS\s0 transport requests |
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210 | (default: \f(CW100\fR). \s-1GVPE\s0 will never issue more requests then the given |
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211 | limit without receiving replies. In heavily overloaded situations it might |
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212 | help to set this to a low number (e.g. \f(CW3\fR or even \f(CW1\fR) to limit the |
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213 | number of parallel requests. |
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214 | .Sp |
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215 | The default should be working ok for most links. |
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216 | .IP "dns-overlap-factor = float" 4 |
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217 | .IX Item "dns-overlap-factor = float" |
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218 | The \s-1DNS\s0 transport uses the minimum request latency (\fBmin_latency\fR) seen |
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219 | during a connection as it's timing base. This factor (default: \f(CW0.5\fR, |
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220 | must be > 0) is multiplied by \fBmin_latency\fR to get the maximum sending |
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221 | rate (= minimum send interval), i.e. a factor of \f(CW1\fR means that a new |
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222 | request might be generated every \fBmin_latency\fR seconds, which means on |
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223 | average there should only ever be one outstanding request. A factor of |
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224 | \&\f(CW0.5\fR means that \s-1GVPE\s0 will send requests twice as often as the minimum |
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225 | latency measured. |
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226 | .Sp |
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227 | For congested or picky dns forwarders you could use a value nearer to or |
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228 | exceeding \f(CW1\fR. |
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229 | .Sp |
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230 | The default should be working ok for most links. |
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231 | .IP "dns-send-interval = send-interval-in-seconds" 4 |
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232 | .IX Item "dns-send-interval = send-interval-in-seconds" |
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233 | The minimum send interval (= maximum rate) that the \s-1DNS\s0 transport will |
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234 | use to send new \s-1DNS\s0 requests. \s-1GVPE\s0 will not exceed this rate even when |
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235 | the latency is very low. The default is \f(CW0.01\fR, which means \s-1GVPE\s0 will |
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236 | not send more than 100 \s-1DNS\s0 requests per connection per second. For |
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237 | high-bandwidth links you could go lower, e.g. to \f(CW0.001\fR or so. For |
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238 | congested or rate-limited links, you might want to go higher, say \f(CW0.1\fR, |
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239 | \&\f(CW0.2\fR or even higher. |
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240 | .Sp |
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241 | The default should be working ok for most links. |
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242 | .IP "dns-timeout-factor = float" 4 |
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243 | .IX Item "dns-timeout-factor = float" |
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244 | Factor to multiply the \f(CW\*(C`min_latency\*(C'\fR (see \f(CW\*(C`dns\-overlap\-factor\*(C'\fR) by to |
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245 | get request timeouts. The default of \f(CW8\fR means that the \s-1DNS\s0 transport |
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246 | will resend the request when no reply has been received for longer than |
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247 | eight times the minimum (= expected) latency, assuming the request or |
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248 | reply has been lost. |
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249 | .Sp |
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250 | For congested links a higher value might be necessary (e.g. \f(CW30\fR). If the |
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251 | link is very stable lower values (e.g. \f(CW2\fR) might work nicely. Values |
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252 | near or below \f(CW1\fR makes no sense whatsoever. |
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253 | .Sp |
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254 | The default should be working ok for most links. |
207 | .IP "if-up = relative-or-absolute-path" 4 |
255 | .IP "if-up = relative-or-absolute-path" 4 |
208 | .IX Item "if-up = relative-or-absolute-path" |
256 | .IX Item "if-up = relative-or-absolute-path" |
209 | Sets the path of a script that should be called immediately after the |
257 | Sets the path of a script that should be called immediately after the |
210 | network interface is initialized (but not neccessarily up). The following |
258 | network interface is initialized (but not neccessarily up). The following |
211 | environment variables are passed to it (the values are just examples): |
259 | environment variables are passed to it (the values are just examples). |
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260 | .Sp |
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261 | Variables that have the same value on all nodes: |
212 | .RS 4 |
262 | .RS 4 |
213 | .IP "CONFBASE=/etc/gvpe" 4 |
263 | .IP "CONFBASE=/etc/gvpe" 4 |
214 | .IX Item "CONFBASE=/etc/gvpe" |
264 | .IX Item "CONFBASE=/etc/gvpe" |
215 | The configuration base directory. |
265 | The configuration base directory. |
216 | .IP "IFNAME=vpn0" 4 |
266 | .IP "IFNAME=vpn0" 4 |
217 | .IX Item "IFNAME=vpn0" |
267 | .IX Item "IFNAME=vpn0" |
218 | The interface to initialize. |
268 | The network interface to initialize. |
219 | .IP "MTU=1436" 4 |
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220 | .IX Item "MTU=1436" |
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221 | The \s-1MTU\s0 to set the interface to. You can use lower values (if done |
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222 | consistently on all hosts), but this is usually ineffective. |
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223 | .IP "MAC=fe:fd:80:00:00:01" 4 |
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224 | .IX Item "MAC=fe:fd:80:00:00:01" |
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225 | The \s-1MAC\s0 address to set the interface to. The script *must* set the |
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226 | interface \s-1MAC\s0 to this value. You will most likely use one of these: |
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227 | .Sp |
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228 | .Vb 2 |
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229 | \& ip link set $IFNAME address $MAC mtu $MTU up # GNU/Linux |
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230 | \& ifconfig $IFNAME ether $MAC mtu $MTU up # FreeBSD |
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231 | .Ve |
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232 | .Sp |
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233 | Please see the \f(CW\*(C`gvpe.osdep(5)\*(C'\fR manpage for platform-specific information. |
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234 | .IP "IFTYPE=native # or tincd" 4 |
269 | .IP "IFTYPE=native # or tincd" 4 |
235 | .IX Item "IFTYPE=native # or tincd" |
270 | .IX Item "IFTYPE=native # or tincd" |
236 | .PD 0 |
271 | .PD 0 |
237 | .IP "IFSUBTYPE=linux # or freebsd, darwin etc.." 4 |
272 | .IP "IFSUBTYPE=linux # or freebsd, darwin etc.." 4 |
238 | .IX Item "IFSUBTYPE=linux # or freebsd, darwin etc.." |
273 | .IX Item "IFSUBTYPE=linux # or freebsd, darwin etc.." |
239 | .PD |
274 | .PD |
240 | The interface type (\f(CW\*(C`native\*(C'\fR or \f(CW\*(C`tincd\*(C'\fR) and the subtype (usually the os |
275 | The interface type (\f(CW\*(C`native\*(C'\fR or \f(CW\*(C`tincd\*(C'\fR) and the subtype (usually the |
241 | name in lowercase) that this gvpe was configured for. Can be used to select |
276 | \&\s-1OS\s0 name in lowercase) that this \s-1GVPE\s0 was configured for. Can be used to |
242 | the correct syntax to use for network-related commands. |
277 | select the correct syntax to use for network-related commands. |
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278 | .IP "MTU=1436" 4 |
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279 | .IX Item "MTU=1436" |
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280 | The \s-1MTU\s0 to set the interface to. You can use lower values (if done |
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281 | consistently on all hosts), but this is usually ineffective. |
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282 | .IP "NODES=5" 4 |
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283 | .IX Item "NODES=5" |
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284 | The number of nodes in this \s-1GVPE\s0 network. |
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285 | .RE |
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286 | .RS 4 |
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287 | .Sp |
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288 | Variables that are node-specific and with values pertaining to the node |
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289 | running this \s-1GVPE:\s0 |
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290 | .IP "IFUPDATA=string" 4 |
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291 | .IX Item "IFUPDATA=string" |
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292 | The value of the configuration directive \f(CW\*(C`if\-up\-data\*(C'\fR. |
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293 | .IP "MAC=fe:fd:80:00:00:01" 4 |
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294 | .IX Item "MAC=fe:fd:80:00:00:01" |
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295 | The \s-1MAC\s0 address the network interface has to use. |
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296 | .Sp |
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297 | Might be used to initialize interfaces on platforms where \s-1GVPE\s0 does not |
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298 | do this automatically. Please see the \f(CW\*(C`gvpe.osdep(5)\*(C'\fR manpage for |
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299 | platform-specific information. |
243 | .IP "NODENAME=branch1" 4 |
300 | .IP "NODENAME=branch1" 4 |
244 | .IX Item "NODENAME=branch1" |
301 | .IX Item "NODENAME=branch1" |
245 | The nickname of the current node, as passed to the gvpe daemon. |
302 | The nickname of the node. |
246 | .IP "NODEID=1" 4 |
303 | .IP "NODEID=1" 4 |
247 | .IX Item "NODEID=1" |
304 | .IX Item "NODEID=1" |
248 | The numerical node id of the current node. The first node mentioned in the |
305 | The numerical node \s-1ID\s0 of the node running this instance of \s-1GVPE\s0. The first |
249 | config file gets \s-1ID\s0 1, the second \s-1ID\s0 2 and so on. |
306 | node mentioned in the config file gets \s-1ID\s0 1, the second \s-1ID\s0 2 and so on. |
250 | .RE |
307 | .RE |
251 | .RS 4 |
308 | .RS 4 |
252 | .Sp |
309 | .Sp |
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310 | In addition, all node-specific variables (except \f(CW\*(C`NODEID\*(C'\fR) will be |
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311 | available with a postfix of \f(CW\*(C`_nodeid\*(C'\fR, which contains the value for that |
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312 | node, e.g. the \f(CW\*(C`MAC_1\*(C'\fR variable contains the \s-1MAC\s0 address of node #1, while |
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313 | the \f(CW\*(C`NODENAME_22\*(C'\fR variable contains the name of node #22. |
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314 | .Sp |
253 | Here is a simple if-up script: |
315 | Here is a simple if-up script: |
254 | .Sp |
316 | .Sp |
255 | .Vb 5 |
317 | .Vb 5 |
256 | \& #!/bin/sh |
318 | \& #!/bin/sh |
257 | \& ip link set $IFNAME address $MAC mtu $MTU up |
319 | \& ip link set $IFNAME up |
258 | \& [ $NODENAME = branch1 ] && ip addr add 10.0.0.1 dev $IFNAME |
320 | \& [ $NODENAME = branch1 ] && ip addr add 10.0.0.1 dev $IFNAME |
259 | \& [ $NODENAME = branch2 ] && ip addr add 10.1.0.1 dev $IFNAME |
321 | \& [ $NODENAME = branch2 ] && ip addr add 10.1.0.1 dev $IFNAME |
260 | \& ip route add 10.0.0.0/8 dev $IFNAME |
322 | \& ip route add 10.0.0.0/8 dev $IFNAME |
261 | .Ve |
323 | .Ve |
262 | .Sp |
324 | .Sp |
… | |
… | |
350 | used to select the right configuration section and must be passed as an |
412 | used to select the right configuration section and must be passed as an |
351 | argument to the gvpe daemon. |
413 | argument to the gvpe daemon. |
352 | .IP "node-up = relative-or-absolute-path" 4 |
414 | .IP "node-up = relative-or-absolute-path" 4 |
353 | .IX Item "node-up = relative-or-absolute-path" |
415 | .IX Item "node-up = relative-or-absolute-path" |
354 | Sets a command (default: no script) that should be called whenever a |
416 | Sets a command (default: no script) that should be called whenever a |
355 | connection is established (even on rekeying operations). In addition |
417 | connection is established (even on rekeying operations). In addition to |
356 | to the variables passed to \f(CW\*(C`if\-up\*(C'\fR scripts, the following environment |
418 | all the variables passed to \f(CW\*(C`if\-up\*(C'\fR scripts, the following environment |
357 | variables will be set: |
419 | variables will be set: |
358 | .RS 4 |
420 | .RS 4 |
359 | .IP "DESTNODE=branch2" 4 |
421 | .IP "DESTNODE=branch2" 4 |
360 | .IX Item "DESTNODE=branch2" |
422 | .IX Item "DESTNODE=branch2" |
361 | The name of the remote node. |
423 | The name of the remote node. |
… | |
… | |
455 | .IP "dns-port = port-number" 4 |
517 | .IP "dns-port = port-number" 4 |
456 | .IX Item "dns-port = port-number" |
518 | .IX Item "dns-port = port-number" |
457 | The port to bind the \s-1DNS\s0 tunnel socket to. Must be \f(CW53\fR on \s-1DNS\s0 tunnel servers. |
519 | The port to bind the \s-1DNS\s0 tunnel socket to. Must be \f(CW53\fR on \s-1DNS\s0 tunnel servers. |
458 | .IP "enable-dns = yes|true|on | no|false|off" 4 |
520 | .IP "enable-dns = yes|true|on | no|false|off" 4 |
459 | .IX Item "enable-dns = yes|true|on | no|false|off" |
521 | .IX Item "enable-dns = yes|true|on | no|false|off" |
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522 | See \fIgvpe.protocol\fR\|(7) for a description of the \s-1DNS\s0 transport |
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523 | protocol. Avoid this protocol if you can. |
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524 | .Sp |
460 | Enable the \s-1DNS\s0 tunneling protocol on this node, either as server or as |
525 | Enable the \s-1DNS\s0 tunneling protocol on this node, either as server or as |
461 | client (only available when gvpe was compiled with \f(CW\*(C`\-\-enable\-dns\*(C'\fR). |
526 | client. Support for this transport protocol is only available when gvpe |
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527 | was compiled using the \f(CW\*(C`\-\-enable\-dns\*(C'\fR option. |
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528 | .IP "enable-icmp = yes|true|on | no|false|off" 4 |
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529 | .IX Item "enable-icmp = yes|true|on | no|false|off" |
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530 | See \fIgvpe.protocol\fR\|(7) for a description of the \s-1ICMP\s0 transport protocol. |
462 | .Sp |
531 | .Sp |
463 | \&\fB\s-1WARNING:\s0\fR Parsing and generating \s-1DNS\s0 packets is rather tricky. The code |
532 | Enable the \s-1ICMP\s0 transport using icmp packets of type \f(CW\*(C`icmp\-type\*(C'\fR on this |
464 | almost certainly contains buffer overflows and other, likely exploitable, |
533 | node. |
465 | bugs. You have been warned. |
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466 | .Sp |
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467 | This is the worst choice of transport protocol with respect to overhead |
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468 | (overhead can be 2\-3 times higher than the transferred data), and probably |
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469 | the best choice when tunneling through firewalls. |
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470 | .IP "enable-rawip = yes|true|on | no|false|off" 4 |
534 | .IP "enable-rawip = yes|true|on | no|false|off" 4 |
471 | .IX Item "enable-rawip = yes|true|on | no|false|off" |
535 | .IX Item "enable-rawip = yes|true|on | no|false|off" |
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536 | See \fIgvpe.protocol\fR\|(7) for a description of the \s-1RAW\s0 \s-1IP\s0 transport protocol. |
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537 | .Sp |
472 | Enable the \s-1RAW\s0 IPv4 transport using the \f(CW\*(C`ip\-proto\*(C'\fR protocol |
538 | Enable the \s-1RAW\s0 IPv4 transport using the \f(CW\*(C`ip\-proto\*(C'\fR protocol |
473 | (default: \f(CW\*(C`no\*(C'\fR). This is the best choice, since the minimum overhead per |
539 | (default: \f(CW\*(C`no\*(C'\fR). |
474 | packet is only 38 bytes, as opposed to \s-1UDP\s0's 58 (or \s-1TCP\s0's 60+). |
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475 | .IP "enable-tcp = yes|true|on | no|false|off" 4 |
540 | .IP "enable-tcp = yes|true|on | no|false|off" 4 |
476 | .IX Item "enable-tcp = yes|true|on | no|false|off" |
541 | .IX Item "enable-tcp = yes|true|on | no|false|off" |
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542 | See \fIgvpe.protocol\fR\|(7) for a description of the \s-1TCP\s0 transport protocol. |
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543 | .Sp |
477 | Enable the TCPv4 transport using the \f(CW\*(C`tcp\-port\*(C'\fR port |
544 | Enable the TCPv4 transport using the \f(CW\*(C`tcp\-port\*(C'\fR port |
478 | (default: \f(CW\*(C`no\*(C'\fR). Support for this horribly unsuitable protocol is only |
545 | (default: \f(CW\*(C`no\*(C'\fR). Support for this transport protocol is only available |
479 | available when gvpe was compiled using the \f(CW\*(C`\-\-enable\-tcp\*(C'\fR option. Never |
546 | when gvpe was compiled using the \f(CW\*(C`\-\-enable\-tcp\*(C'\fR option. |
480 | use this transport unless you really must, it is very inefficient and |
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481 | resource-intensive compared to the other transports (except for \s-1DNS\s0, which |
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482 | is worse). |
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483 | .IP "enable-udp = yes|true|on | no|false|off" 4 |
547 | .IP "enable-udp = yes|true|on | no|false|off" 4 |
484 | .IX Item "enable-udp = yes|true|on | no|false|off" |
548 | .IX Item "enable-udp = yes|true|on | no|false|off" |
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549 | See \fIgvpe.protocol\fR\|(7) for a description of the \s-1UDP\s0 transport protocol. |
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550 | .Sp |
485 | Enable the UDPv4 transport using the \f(CW\*(C`udp\-port\*(C'\fR port (default: \f(CW\*(C`no\*(C'\fR, |
551 | Enable the UDPv4 transport using the \f(CW\*(C`udp\-port\*(C'\fR port (default: \f(CW\*(C`no\*(C'\fR, |
486 | unless no other protocol is enabled for a node, in which case this |
552 | unless no other protocol is enabled for a node, in which case this |
487 | protocol is enabled automatically). This is a good general choice since |
553 | protocol is enabled automatically). |
488 | \&\s-1UDP\s0 tunnels well through many firewalls. |
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489 | .Sp |
554 | .Sp |
490 | \&\s-1NOTE:\s0 Please specify \f(CW\*(C`enable\-udp = yes\*(C'\fR if you want t use it even though |
555 | \&\s-1NOTE:\s0 Please specify \f(CW\*(C`enable\-udp = yes\*(C'\fR if you want t use it even though |
491 | it might get switched on automatically, as some future version might |
556 | it might get switched on automatically, as some future version might |
492 | default to another default protocol. |
557 | default to another default protocol. |
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558 | .IP "icmp-type = integer" 4 |
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559 | .IX Item "icmp-type = integer" |
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560 | Sets the type value to be used for outgoing (and incoming) packets sent |
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561 | via the \s-1ICMP\s0 transport. |
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562 | .Sp |
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563 | The default is \f(CW0\fR (which is \f(CW\*(C`echo\-reply\*(C'\fR, also known as |
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564 | \&\*(L"ping\-replies\*(R"). Other useful values include \f(CW8\fR (\f(CW\*(C`echo\-request\*(C'\fR, a.k.a. |
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565 | \&\*(L"ping\*(R") and \f(CW11\fR (\f(CW\*(C`time\-exceeded\*(C'\fR), but any 8\-bit value can be used. |
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566 | .IP "if-up-data = value" 4 |
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567 | .IX Item "if-up-data = value" |
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568 | The value specified using this directive will be passed to the \f(CW\*(C`if\-up\*(C'\fR |
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569 | script in the environment variable \f(CW\*(C`IFUPDATA\*(C'\fR. |
493 | .IP "inherit-tos = yes|true|on | no|false|off" 4 |
570 | .IP "inherit-tos = yes|true|on | no|false|off" 4 |
494 | .IX Item "inherit-tos = yes|true|on | no|false|off" |
571 | .IX Item "inherit-tos = yes|true|on | no|false|off" |
495 | Wether to inherit the \s-1TOS\s0 settings of packets sent to the tunnel when |
572 | Wether to inherit the \s-1TOS\s0 settings of packets sent to the tunnel when |
496 | sending packets to this node (default: \f(CW\*(C`yes\*(C'\fR). If set to \f(CW\*(C`yes\*(C'\fR then |
573 | sending packets to this node (default: \f(CW\*(C`yes\*(C'\fR). If set to \f(CW\*(C`yes\*(C'\fR then |
497 | outgoing tunnel packets will have the same \s-1TOS\s0 setting as the packets sent |
574 | outgoing tunnel packets will have the same \s-1TOS\s0 setting as the packets sent |
… | |
… | |
549 | .SH "SEE ALSO" |
626 | .SH "SEE ALSO" |
550 | .IX Header "SEE ALSO" |
627 | .IX Header "SEE ALSO" |
551 | \&\fIgvpe\fR\|(5), \fIgvpe\fR\|(8), \fIgvpectrl\fR\|(8). |
628 | \&\fIgvpe\fR\|(5), \fIgvpe\fR\|(8), \fIgvpectrl\fR\|(8). |
552 | .SH "AUTHOR" |
629 | .SH "AUTHOR" |
553 | .IX Header "AUTHOR" |
630 | .IX Header "AUTHOR" |
554 | Marc Lehmann <gvpe@plan9.de> |
631 | Marc Lehmann <gvpe@schmorp.de> |