… | |
… | |
2 | |
2 | |
3 | gvpe.conf - configuration file for the GNU VPE daemon |
3 | gvpe.conf - configuration file for the GNU VPE daemon |
4 | |
4 | |
5 | =head1 SYNOPSIS |
5 | =head1 SYNOPSIS |
6 | |
6 | |
7 | enable-udp = yes |
|
|
8 | udp-port = 407 |
7 | udp-port = 407 |
9 | mtu = 1492 |
8 | mtu = 1492 |
10 | ifname = vpn0 |
9 | ifname = vpn0 |
11 | |
10 | |
12 | node = branch1 |
11 | node = branch1 |
… | |
… | |
22 | =head1 DESCRIPTION |
21 | =head1 DESCRIPTION |
23 | |
22 | |
24 | The gvpe config file consists of a series of lines that contain C<variable |
23 | The gvpe config file consists of a series of lines that contain C<variable |
25 | = value> pairs. Empty lines are ignored. Comments start with a C<#> and |
24 | = value> pairs. Empty lines are ignored. Comments start with a C<#> and |
26 | extend to the end of the line. They can be used on their own lines, or |
25 | extend to the end of the line. They can be used on their own lines, or |
27 | after any directives. Spaces are allowed before or after the C<=> sign or |
26 | after any directives. Whitespace is allowed around the C<=> sign or after |
28 | after values, but not within the variable names or values themselves. |
27 | values, but not within the variable names or values themselves. |
29 | |
28 | |
30 | The only exception to the above is the "on" directive that can prefix any |
29 | The only exception to the above is the "on" directive that can prefix any |
31 | C<name = value> setting and will only "execute" it on the named node, or |
30 | C<name = value> setting and will only "execute" it on the named node, or |
32 | (if the nodename starts with "!") on all nodes except the named one. |
31 | (if the nodename starts with "!") on all nodes except the named one. |
33 | |
32 | |
… | |
… | |
61 | values on different nodes using C<on>), but will affect the behaviour of |
60 | values on different nodes using C<on>), but will affect the behaviour of |
62 | the gvpe daemon and all connections it creates. |
61 | the gvpe daemon and all connections it creates. |
63 | |
62 | |
64 | =over 4 |
63 | =over 4 |
65 | |
64 | |
66 | =item loglevel = noise|trace|debug|info|notice|warn|error|critical |
65 | =item dns-forw-host = hostname/ip |
67 | |
66 | |
68 | Set the logging level. Connection established messages are logged at level |
67 | The dns server to forward dns requests to for the DNS tunnel protocol |
69 | C<info>, notable errors are logged with C<error>. Default is C<info>. |
68 | (default: C<127.0.0.1>, changing it is highly recommended). |
70 | |
69 | |
71 | =item node = nickname |
70 | =item dns-forw-port = port-number |
72 | |
71 | |
73 | Not really a config setting but introduces a node section. The nickname is |
72 | The port where the C<dns-forw-host> is to be contacted (default: C<53>, |
74 | used to select the right configuration section and must be passed as an |
73 | which is fine in most cases). |
75 | argument to the gvpe daemon. |
|
|
76 | |
74 | |
77 | =item private-key = relative-path-to-key |
75 | =item dns-max-outstanding = integer-number-of-requests |
78 | |
76 | |
79 | Sets the path (relative to the config directory) to the private key |
77 | The maximum number of outstanding DNS transport requests |
80 | (default: C<hostkey>). This is a printf format string so every C<%> must |
78 | (default: C<100>). GVPE will never issue more requests then the given |
81 | be doubled. A single C<%s> is replaced by the hostname, so you could |
79 | limit without receiving replies. In heavily overloaded situations it might |
82 | use paths like C<hostkeys/%s> to fetch the files at the location where |
80 | help to set this to a low number (e.g. C<3> or even C<1>) to limit the |
83 | C<gvpectrl> puts them. |
81 | number of parallel requests. |
84 | |
82 | |
85 | Since only the private key file of the current node is used and the |
83 | The default should be working ok for most links. |
86 | private key file should be kept secret per-host to avoid spoofings, it is |
84 | |
87 | not recommended to use this feature. |
85 | =item dns-overlap-factor = float |
|
|
86 | |
|
|
87 | The DNS transport uses the minimum request latency (B<min_latency>) seen |
|
|
88 | during a connection as it's timing base. This factor (default: C<0.5>, |
|
|
89 | must be > 0) is multiplied by B<min_latency> to get the maximum sending |
|
|
90 | rate (= minimum send interval), i.e. a factor of C<1> means that a new |
|
|
91 | request might be generated every B<min_latency> seconds, which means on |
|
|
92 | average there should only ever be one outstanding request. A factor of |
|
|
93 | C<0.5> means that GVPE will send requests twice as often as the minimum |
|
|
94 | latency measured. |
|
|
95 | |
|
|
96 | For congested or picky dns forwarders you could use a value nearer to or |
|
|
97 | exceeding C<1>. |
|
|
98 | |
|
|
99 | The default should be working ok for most links. |
|
|
100 | |
|
|
101 | =item dns-send-interval = send-interval-in-seconds |
|
|
102 | |
|
|
103 | The minimum send interval (= maximum rate) that the DNS transport will |
|
|
104 | use to send new DNS requests. GVPE will not exceed this rate even when |
|
|
105 | the latency is very low. The default is C<0.01>, which means GVPE will |
|
|
106 | not send more than 100 DNS requests per connection per second. For |
|
|
107 | high-bandwidth links you could go lower, e.g. to C<0.001> or so. For |
|
|
108 | congested or rate-limited links, you might want to go higher, say C<0.1>, |
|
|
109 | C<0.2> or even higher. |
|
|
110 | |
|
|
111 | The default should be working ok for most links. |
|
|
112 | |
|
|
113 | =item dns-timeout-factor = float |
|
|
114 | |
|
|
115 | Factor to multiply the C<min_latency> (see C<dns-overlap-factor>) by to |
|
|
116 | get request timeouts. The default of C<8> means that the DNS transport |
|
|
117 | will resend the request when no reply has been received for longer than |
|
|
118 | eight times the minimum (= expected) latency, assuming the request or |
|
|
119 | reply has been lost. |
|
|
120 | |
|
|
121 | For congested links a higher value might be necessary (e.g. C<30>). If the |
|
|
122 | link is very stable lower values (e.g. C<2>) might work nicely. Values |
|
|
123 | near or below C<1> makes no sense whatsoever. |
|
|
124 | |
|
|
125 | The default should be working ok for most links. |
|
|
126 | |
|
|
127 | =item if-up = relative-or-absolute-path |
|
|
128 | |
|
|
129 | Sets the path of a script that should be called immediately after the |
|
|
130 | network interface is initialized (but not neccessarily up). The following |
|
|
131 | environment variables are passed to it (the values are just examples). |
|
|
132 | |
|
|
133 | Variables that have the same value on all nodes: |
|
|
134 | |
|
|
135 | =over 4 |
|
|
136 | |
|
|
137 | =item CONFBASE=/etc/gvpe |
|
|
138 | |
|
|
139 | The configuration base directory. |
|
|
140 | |
|
|
141 | =item IFNAME=vpn0 |
|
|
142 | |
|
|
143 | The network interface to initialize. |
|
|
144 | |
|
|
145 | =item IFTYPE=native # or tincd |
|
|
146 | |
|
|
147 | =item IFSUBTYPE=linux # or freebsd, darwin etc.. |
|
|
148 | |
|
|
149 | The interface type (C<native> or C<tincd>) and the subtype (usually the |
|
|
150 | OS name in lowercase) that this GVPE was configured for. Can be used to |
|
|
151 | select the correct syntax to use for network-related commands. |
|
|
152 | |
|
|
153 | =item MTU=1436 |
|
|
154 | |
|
|
155 | The MTU to set the interface to. You can use lower values (if done |
|
|
156 | consistently on all hosts), but this is usually ineffective. |
|
|
157 | |
|
|
158 | =item NODES=5 |
|
|
159 | |
|
|
160 | The number of nodes in this GVPE network. |
|
|
161 | |
|
|
162 | =back |
|
|
163 | |
|
|
164 | Variables that are node-specific and with values pertaining to the node |
|
|
165 | running this GVPE: |
|
|
166 | |
|
|
167 | =over 4 |
|
|
168 | |
|
|
169 | =item IFUPDATA=string |
|
|
170 | |
|
|
171 | The value of the configuration directive C<if-up-data>. |
|
|
172 | |
|
|
173 | =item MAC=fe:fd:80:00:00:01 |
|
|
174 | |
|
|
175 | The MAC address the network interface has to use. |
|
|
176 | |
|
|
177 | Might be used to initialize interfaces on platforms where GVPE does not |
|
|
178 | do this automatically. Please see the C<gvpe.osdep(5)> manpage for |
|
|
179 | platform-specific information. |
|
|
180 | |
|
|
181 | =item NODENAME=branch1 |
|
|
182 | |
|
|
183 | The nickname of the node. |
|
|
184 | |
|
|
185 | =item NODEID=1 |
|
|
186 | |
|
|
187 | The numerical node ID of the node running this instance of GVPE. The first |
|
|
188 | node mentioned in the config file gets ID 1, the second ID 2 and so on. |
|
|
189 | |
|
|
190 | =back |
|
|
191 | |
|
|
192 | In addition, all node-specific variables (except C<NODEID>) will be |
|
|
193 | available with a postfix of C<_nodeid>, which contains the value for that |
|
|
194 | node, e.g. the C<MAC_1> variable contains the MAC address of node #1, while |
|
|
195 | the C<NODENAME_22> variable contains the name of node #22. |
|
|
196 | |
|
|
197 | Here is a simple if-up script: |
|
|
198 | |
|
|
199 | #!/bin/sh |
|
|
200 | ip link set $IFNAME up |
|
|
201 | [ $NODENAME = branch1 ] && ip addr add 10.0.0.1 dev $IFNAME |
|
|
202 | [ $NODENAME = branch2 ] && ip addr add 10.1.0.1 dev $IFNAME |
|
|
203 | ip route add 10.0.0.0/8 dev $IFNAME |
|
|
204 | |
|
|
205 | More complicated examples (using routing to reduce arp traffic) can be |
|
|
206 | found in the etc/ subdirectory of the distribution. |
|
|
207 | |
|
|
208 | =item ifname = devname |
|
|
209 | |
|
|
210 | Sets the tun interface name to the given name. The default is OS-specific |
|
|
211 | and most probably something like C<tun0>. |
88 | |
212 | |
89 | =item ifpersist = yes|true|on | no|false|off |
213 | =item ifpersist = yes|true|on | no|false|off |
90 | |
214 | |
91 | Should the tun/tap device be made persistent, that is, should the device |
215 | Should the tun/tap device be made persistent, that is, should the device |
92 | stay up even when gvpe exits? Some versions of the tunnel device have |
216 | stay up even when gvpe exits? Some versions of the tunnel device have |
93 | problems sending packets when gvpe is restarted in persistent mode, so |
217 | problems sending packets when gvpe is restarted in persistent mode, so |
94 | if the connections can be established but you cannot send packets from |
218 | if the connections can be established but you cannot send packets from |
95 | the local node, try to set this to C<off> and do an ifconfig down on the |
219 | the local node, try to set this to C<off> and do an ifconfig down on the |
96 | device. |
220 | device. |
97 | |
221 | |
98 | =item ifname = devname |
222 | =item ip-proto = numerical-ip-protocol |
99 | |
223 | |
100 | Sets the tun interface name to the given name. The default is OS-specific |
224 | Sets the protocol number to be used for the rawip protocol. This is a |
101 | and most probably something like C<tun0>. |
225 | global option because all hosts must use the same protocol, and since |
|
|
226 | there are no port numbers, you cannot easily run more than one gvpe |
|
|
227 | instance using the same protocol, nor can you share the protocol with |
|
|
228 | other programs. |
102 | |
229 | |
103 | =item rekey = seconds |
230 | The default is 47 (GRE), which has a good chance of tunneling through |
|
|
231 | firewalls (but note that the rawip protocol is not GRE compatible). Other |
|
|
232 | common choices are 50 (IPSEC, ESP), 51 (IPSEC, AH), 4 (IPIP tunnels) or 98 |
|
|
233 | (ENCAP, rfc1241) |
104 | |
234 | |
105 | Sets the rekeying interval in seconds (default: C<3600>). Connections are |
235 | =item http-proxy-host = hostname/ip |
106 | reestablished every C<rekey> seconds. |
236 | |
|
|
237 | The C<http-proxy-*> family of options are only available if gvpe was |
|
|
238 | compiled with the C<--enable-http-proxy> option and enable tunneling of |
|
|
239 | tcp connections through a http proxy server. |
|
|
240 | |
|
|
241 | C<http-proxy-host> and C<http-proxy-port> should specify the hostname and |
|
|
242 | port number of the proxy server. See C<http-proxy-loginpw> if your proxy |
|
|
243 | requires authentication. |
|
|
244 | |
|
|
245 | Please note that gvpe will still try to resolve all hostnames in the |
|
|
246 | configuration file, so if you are behind a proxy without access to a dns |
|
|
247 | server better use numerical IP addresses. |
|
|
248 | |
|
|
249 | To make best use of this option disable all protocols except tcp in your |
|
|
250 | config file and make sure your routers (or all other hosts) are listening |
|
|
251 | on a port that the proxy allows (443, https, is a common choice). |
|
|
252 | |
|
|
253 | If you have a router, connecting to it will suffice. Otherwise tcp must be |
|
|
254 | enabled on all hosts. |
|
|
255 | |
|
|
256 | Example: |
|
|
257 | |
|
|
258 | http-proxy-host = proxy.example.com |
|
|
259 | http-proxy-port = 3128 # 8080 is another common choice |
|
|
260 | http-proxy-auth = schmorp:grumbeere |
|
|
261 | |
|
|
262 | =item http-proxy-port = proxy-tcp-port |
|
|
263 | |
|
|
264 | The port where your proxy server listens. |
|
|
265 | |
|
|
266 | =item http-proxy-auth = login:password |
|
|
267 | |
|
|
268 | The optional login and password used to authenticate to the proxy server, |
|
|
269 | seperated by a literal colon (C<:>). Only basic authentication is |
|
|
270 | currently supported. |
107 | |
271 | |
108 | =item keepalive = seconds |
272 | =item keepalive = seconds |
109 | |
273 | |
110 | Sets the keepalive probe interval in seconds (default: C<60>). After this |
274 | Sets the keepalive probe interval in seconds (default: C<60>). After this |
111 | many seconds of inactivity the daemon will start to send keepalive probe |
275 | many seconds of inactivity the daemon will start to send keepalive probe |
112 | every 5 seconds until it receives a reply from the other end. If no reply |
276 | every 5 seconds until it receives a reply from the other end. If no reply |
113 | is received within 30 seconds, the peer is considered unreachable and the |
277 | is received within 30 seconds, the peer is considered unreachable and the |
114 | connection is closed. |
278 | connection is closed. |
115 | |
279 | |
|
|
280 | =item loglevel = noise|trace|debug|info|notice|warn|error|critical |
|
|
281 | |
|
|
282 | Set the logging level. Connection established messages are logged at level |
|
|
283 | C<info>, notable errors are logged with C<error>. Default is C<info>. |
|
|
284 | |
116 | =item mtu = bytes |
285 | =item mtu = bytes |
117 | |
286 | |
118 | Sets the maximum MTU that should be used on outgoing packets (basically |
287 | Sets the maximum MTU that should be used on outgoing packets (basically |
119 | the MTU of the outgoing interface) The daemon will automatically calculate |
288 | the MTU of the outgoing interface) The daemon will automatically calculate |
120 | maximum overhead (e.g. udp header size, encryption blocksize...) and pass |
289 | maximum overhead (e.g. udp header size, encryption blocksize...) and pass |
… | |
… | |
122 | |
291 | |
123 | Recommended values are 1500 (ethernet), 1492 (pppoe), 1472 (pptp). |
292 | Recommended values are 1500 (ethernet), 1492 (pppoe), 1472 (pptp). |
124 | |
293 | |
125 | This value must be the minimum of the mtu values of all hosts. |
294 | This value must be the minimum of the mtu values of all hosts. |
126 | |
295 | |
127 | =item ip-proto = numerical-ip-protocol |
296 | =item node = nickname |
128 | |
297 | |
129 | Sets the protocol number to be used for the rawip protocol. This is a |
298 | Not really a config setting but introduces a node section. The nickname is |
130 | global option because all hosts must use the same protocol, and since |
299 | used to select the right configuration section and must be passed as an |
131 | there are no port numbers, you cannot easily run more than one gvpe |
300 | argument to the gvpe daemon. |
132 | instance using the same protocol, nor can you share the protocol with |
|
|
133 | other programs. |
|
|
134 | |
|
|
135 | The default is 47 (GRE), which has a good chance of tunneling through |
|
|
136 | firewalls (but note that the rawip protocol is not GRE compatible). Other |
|
|
137 | common choices are 50 (IPSEC, ESP), 51 (IPSEC, AH), 4 (IPIP tunnels) or 98 |
|
|
138 | (ENCAP, rfc1241) |
|
|
139 | |
|
|
140 | =item if-up = relative-or-absolute-path |
|
|
141 | |
|
|
142 | Sets the path of a script that should be called immediately after the |
|
|
143 | network interface is initialized (but not neccessarily up). The following |
|
|
144 | environment variables are passed to it (the values are just examples): |
|
|
145 | |
|
|
146 | =over 4 |
|
|
147 | |
|
|
148 | =item CONFBASE=/etc/gvpe |
|
|
149 | |
|
|
150 | The configuration base directory. |
|
|
151 | |
|
|
152 | =item IFNAME=vpn0 |
|
|
153 | |
|
|
154 | The interface to initialize. |
|
|
155 | |
|
|
156 | =item MTU=1436 |
|
|
157 | |
|
|
158 | The MTU to set the interface to. You can use lower values (if done |
|
|
159 | consistently on all hosts), but this is usually ineffective. |
|
|
160 | |
|
|
161 | =item MAC=fe:fd:80:00:00:01 |
|
|
162 | |
|
|
163 | The MAC address to set the interface to. The script *must* set the |
|
|
164 | interface MAC to this value. You will most likely use one of these: |
|
|
165 | |
|
|
166 | ip link set $IFNAME address $MAC mtu $MTU up # GNU/Linux |
|
|
167 | ifconfig $IFNAME ether $MAC mtu $MTU up # FreeBSD |
|
|
168 | |
|
|
169 | Please see the C<gvpe.osdep(5)> manpage for platform-specific information. |
|
|
170 | |
|
|
171 | =item IFTYPE=native # or tincd |
|
|
172 | |
|
|
173 | =item IFSUBTYPE=linux # or freebsd, darwin etc.. |
|
|
174 | |
|
|
175 | The interface type (C<native> or C<tincd>) and the subtype (usually the os |
|
|
176 | name in lowercase) that this gvpe was configured for. Can be used to select |
|
|
177 | the correct syntax to use for network-related commands. |
|
|
178 | |
|
|
179 | =item NODENAME=branch1 |
|
|
180 | |
|
|
181 | The nickname of the current node, as passed to the gvpe daemon. |
|
|
182 | |
|
|
183 | =item NODEID=1 |
|
|
184 | |
|
|
185 | The numerical node id of the current node. The first node mentioned in the |
|
|
186 | config file gets ID 1, the second ID 2 and so on. |
|
|
187 | |
|
|
188 | =back |
|
|
189 | |
|
|
190 | Here is a simple if-up script: |
|
|
191 | |
|
|
192 | #!/bin/sh |
|
|
193 | ip link set $IFNAME address $MAC mtu $MTU up |
|
|
194 | [ $NODENAME = branch1 ] && ip addr add 10.0.0.1 dev $IFNAME |
|
|
195 | [ $NODENAME = branch2 ] && ip addr add 10.1.0.1 dev $IFNAME |
|
|
196 | ip route add 10.0.0.0/8 dev $IFNAME |
|
|
197 | |
|
|
198 | More complicated examples (using routing to reduce arp traffic) can be |
|
|
199 | found in the etc/ subdirectory of the distribution. |
|
|
200 | |
301 | |
201 | =item node-up = relative-or-absolute-path |
302 | =item node-up = relative-or-absolute-path |
202 | |
303 | |
203 | Sets a command (default: no script) that should be called whenever a |
304 | Sets a command (default: no script) that should be called whenever a |
204 | connection is established (even on rekeying operations). In addition |
305 | connection is established (even on rekeying operations). In addition to |
205 | to the variables passed to C<if-up> scripts, the following environment |
306 | all the variables passed to C<if-up> scripts, the following environment |
206 | variables will be set: |
307 | variables will be set: |
207 | |
308 | |
208 | =over 4 |
309 | =over 4 |
209 | |
310 | |
210 | =item DESTNODE=branch2 |
311 | =item DESTNODE=branch2 |
… | |
… | |
243 | |
344 | |
244 | =item node-down = relative-or-absolute-path |
345 | =item node-down = relative-or-absolute-path |
245 | |
346 | |
246 | Same as C<node-up>, but gets called whenever a connection is lost. |
347 | Same as C<node-up>, but gets called whenever a connection is lost. |
247 | |
348 | |
248 | =item http-proxy-host = hostname/ip |
|
|
249 | |
|
|
250 | The C<http-proxy-*> family of options are only available if gvpe was |
|
|
251 | compiled with the C<--enable-http-proxy> option and enable tunneling of |
|
|
252 | tcp connections through a http proxy server. |
|
|
253 | |
|
|
254 | C<http-proxy-host> and C<http-proxy-port> should specify the hostname and |
|
|
255 | port number of the proxy server. See C<http-proxy-loginpw> if your proxy |
|
|
256 | requires authentication. |
|
|
257 | |
|
|
258 | Please note that gvpe will still try to resolve all hostnames in the |
|
|
259 | configuration file, so if you are behind a proxy without access to a dns |
|
|
260 | server better use numerical IP addresses. |
|
|
261 | |
|
|
262 | To make best use of this option disable all protocols except tcp in your |
|
|
263 | config file and make sure your routers (or all other hosts) are listening |
|
|
264 | on a port that the proxy allows (443, https, is a common choice). |
|
|
265 | |
|
|
266 | If you have a router, connecting to it will suffice. Otherwise tcp must be |
|
|
267 | enabled on all hosts. |
|
|
268 | |
|
|
269 | Example: |
|
|
270 | |
|
|
271 | http-proxy-host = proxy.example.com |
|
|
272 | http-proxy-port = 3128 # 8080 is another common choice |
|
|
273 | http-proxy-auth = schmorp:grumbeere |
|
|
274 | |
|
|
275 | =item http-proxy-port = proxy-tcp-port |
|
|
276 | |
|
|
277 | The port where your proxy server listens. |
|
|
278 | |
|
|
279 | =item http-proxy-auth = login:password |
|
|
280 | |
|
|
281 | The optional login and password used to authenticate to the proxy server, |
|
|
282 | seperated by a literal colon (C<:>). Only basic authentication is |
|
|
283 | currently supported. |
|
|
284 | |
|
|
285 | =item pid-file = path |
349 | =item pid-file = path |
286 | |
350 | |
287 | The path to the pid file to check and create (Default: |
351 | The path to the pid file to check and create |
|
|
352 | (default: C<LOCALSTATEDIR/run/gvpe.pid>). |
|
|
353 | |
|
|
354 | =item private-key = relative-path-to-key |
|
|
355 | |
|
|
356 | Sets the path (relative to the config directory) to the private key |
|
|
357 | (default: C<hostkey>). This is a printf format string so every C<%> must |
|
|
358 | be doubled. A single C<%s> is replaced by the hostname, so you could |
|
|
359 | use paths like C<hostkeys/%s> to fetch the files at the location where |
|
|
360 | C<gvpectrl> puts them. |
|
|
361 | |
|
|
362 | Since only the private key file of the current node is used and the |
|
|
363 | private key file should be kept secret per-host to avoid spoofings, it is |
|
|
364 | not recommended to use this feature. |
|
|
365 | |
|
|
366 | =item rekey = seconds |
|
|
367 | |
|
|
368 | Sets the rekeying interval in seconds (default: C<3600>). Connections are |
|
|
369 | reestablished every C<rekey> seconds. |
288 | |
370 | |
289 | =back |
371 | =back |
290 | |
372 | |
291 | =head2 NODE SPECIFIC SETTINGS |
373 | =head2 NODE SPECIFIC SETTINGS |
292 | |
374 | |
… | |
… | |
295 | executed before the first node section set the defaults, settings that are |
377 | executed before the first node section set the defaults, settings that are |
296 | executed within a node section only apply to the given node. |
378 | executed within a node section only apply to the given node. |
297 | |
379 | |
298 | =over 4 |
380 | =over 4 |
299 | |
381 | |
|
|
382 | =item compress = yes|true|on | no|false|off |
|
|
383 | |
|
|
384 | Wether to compress data packets sent to this host (default: C<yes>). |
|
|
385 | Compression is really cheap even on slow computers and has no size |
|
|
386 | overhead at all, so enabling this is a good idea. |
|
|
387 | |
|
|
388 | =item connect = ondemand | never | always | disabled |
|
|
389 | |
|
|
390 | Sets the connect mode (default: C<always>). It can be C<always> (always |
|
|
391 | try to establish and keep a connection to the given host), C<never> |
|
|
392 | (never initiate a connection to the given host, but accept connections), |
|
|
393 | C<ondemand> (try to establish a connection on the first packet sent, and |
|
|
394 | take it down after the keepalive interval) or C<disabled> (node is bad, |
|
|
395 | don't talk to it). |
|
|
396 | |
|
|
397 | =item dns-domain = domain-suffix |
|
|
398 | |
|
|
399 | The DNS domain suffix that points to the DNS tunnel server for this node. |
|
|
400 | |
|
|
401 | The domain must point to a NS record that points to the I<dns-hostname>, |
|
|
402 | i.e. |
|
|
403 | |
|
|
404 | dns-domainname = tunnel.example.net |
|
|
405 | dns-hostname = tunnel-server.example.net |
|
|
406 | |
|
|
407 | Corresponds to the following DNS entries in the C<example.net> domain: |
|
|
408 | |
|
|
409 | tunnel.example.net. NS tunnel-server.example.net. |
|
|
410 | tunnel-server.example.net. A 13.13.13.13 |
|
|
411 | |
|
|
412 | =item dns-hostname = hostname/ip |
|
|
413 | |
|
|
414 | The address to bind the DNS tunnel socket to, similar to the C<hostname>, |
|
|
415 | but for the DNS tunnel protocol only. Default: C<0.0.0.0>, but that might |
|
|
416 | change. |
|
|
417 | |
300 | =item udp-port = port-number |
418 | =item dns-port = port-number |
301 | |
419 | |
302 | Sets the port number used by the UDP protocol (default: C<655>, not |
420 | The port to bind the DNS tunnel socket to. Must be C<53> on DNS tunnel servers. |
303 | officially assigned by IANA!). |
|
|
304 | |
421 | |
305 | =item tcp-port = port-number |
422 | =item enable-dns = yes|true|on | no|false|off |
306 | |
423 | |
307 | Similar to C<udp-port> (default: C<655>), but sets the TCP port number. |
424 | See gvpe.protocol(7) for a description of the DNS transport |
|
|
425 | protocol. Avoid this protocol if you can. |
|
|
426 | |
|
|
427 | Enable the DNS tunneling protocol on this node, either as server or as |
|
|
428 | client. Support for this transport protocol is only available when gvpe |
|
|
429 | was compiled using the C<--enable-dns> option. |
|
|
430 | |
|
|
431 | =item enable-icmp = yes|true|on | no|false|off |
|
|
432 | |
|
|
433 | See gvpe.protocol(7) for a description of the ICMP transport protocol. |
|
|
434 | |
|
|
435 | Enable the ICMP transport using icmp packets of type C<icmp-type> on this |
|
|
436 | node. |
308 | |
437 | |
309 | =item enable-rawip = yes|true|on | no|false|off |
438 | =item enable-rawip = yes|true|on | no|false|off |
310 | |
439 | |
|
|
440 | See gvpe.protocol(7) for a description of the RAW IP transport protocol. |
|
|
441 | |
311 | Enable the RAW IPv4 transport using the C<ip-proto> protocol |
442 | Enable the RAW IPv4 transport using the C<ip-proto> protocol |
312 | (default: C<no>). This is the best choice, since the overhead per packet |
443 | (default: C<no>). |
313 | is only 38 bytes, as opposed to UDP's 58 (or TCP's 60+). |
444 | |
|
|
445 | =item enable-tcp = yes|true|on | no|false|off |
|
|
446 | |
|
|
447 | See gvpe.protocol(7) for a description of the TCP transport protocol. |
|
|
448 | |
|
|
449 | Enable the TCPv4 transport using the C<tcp-port> port |
|
|
450 | (default: C<no>). Support for this transport protocol is only available |
|
|
451 | when gvpe was compiled using the C<--enable-tcp> option. |
314 | |
452 | |
315 | =item enable-udp = yes|true|on | no|false|off |
453 | =item enable-udp = yes|true|on | no|false|off |
316 | |
454 | |
|
|
455 | See gvpe.protocol(7) for a description of the UDP transport protocol. |
|
|
456 | |
317 | Enable the UDPv4 transport using the C<udp-port> port (default: C<yes>, |
457 | Enable the UDPv4 transport using the C<udp-port> port (default: C<no>, |
318 | but this will change!). This is a good general choice since UDP tunnels |
458 | unless no other protocol is enabled for a node, in which case this |
319 | well through many firewalls. |
459 | protocol is enabled automatically). |
320 | |
460 | |
321 | NOTE: Please specify C<enable-udp = yes> even though it is the default, as |
461 | NOTE: Please specify C<enable-udp = yes> if you want t use it even though |
322 | some future version will have all protocols disabled by default. |
462 | it might get switched on automatically, as some future version might |
|
|
463 | default to another default protocol. |
323 | |
464 | |
|
|
465 | =item icmp-type = integer |
|
|
466 | |
|
|
467 | Sets the type value to be used for outgoing (and incoming) packets sent |
|
|
468 | via the ICMP transport. |
|
|
469 | |
|
|
470 | The default is C<0> (which is C<echo-reply>, also known as |
|
|
471 | "ping-replies"). Other useful values include C<8> (C<echo-request>, a.k.a. |
|
|
472 | "ping") and C<11> (C<time-exceeded>), but any 8-bit value can be used. |
|
|
473 | |
|
|
474 | =item if-up-data = value |
|
|
475 | |
|
|
476 | The value specified using this directive will be passed to the C<if-up> |
|
|
477 | script in the environment variable C<IFUPDATA>. |
|
|
478 | |
324 | =item enable-tcp = yes|true|on | no|false|off |
479 | =item inherit-tos = yes|true|on | no|false|off |
325 | |
480 | |
326 | Enable the TCPv4 transport using the C<tcp-port> port |
481 | Wether to inherit the TOS settings of packets sent to the tunnel when |
327 | (default: C<no>). Support for this horribly unsuitable protocol is only |
482 | sending packets to this node (default: C<yes>). If set to C<yes> then |
328 | available when gvpe was compiled using the C<--enable-tcp> option. Never |
483 | outgoing tunnel packets will have the same TOS setting as the packets sent |
329 | use this transport unless you really must, it is horribly ineffiecent and |
484 | to the tunnel device, which is usually what you want. |
330 | resource-intensive compared to the other transports. |
|
|
331 | |
485 | |
|
|
486 | =item max-retry = positive-number |
|
|
487 | |
|
|
488 | The maximum interval in seconds (default: C<3600>, one hour) between |
|
|
489 | retries to establish a connection to this node. When a connection cannot |
|
|
490 | be established, gvpe uses exponential backoff capped at this value. It's |
|
|
491 | sometimes useful to set this to a much lower value (e.g. C<120>) on |
|
|
492 | connections to routers that usually are stable but sometimes are down, to |
|
|
493 | assure quick reconnections even after longer downtimes. |
|
|
494 | |
332 | =item router-priority = 0 | 1 | positive-number>2 |
495 | =item router-priority = 0 | 1 | positive-number>=2 |
333 | |
496 | |
334 | Sets the router priority of the given host (default: C<0>, disabled). If |
497 | Sets the router priority of the given host (default: C<0>, disabled). If |
335 | some host tries to connect to another host without a hostname, it asks |
498 | some host tries to connect to another host without a hostname, it asks |
336 | the router host for it's IP address. The router host is the one with the |
499 | the router host for it's IP address. The router host is the one with the |
337 | highest priority larger than C<1> that is currently reachable. |
500 | highest priority larger than C<1> that is currently reachable. |
… | |
… | |
345 | required, bump the C<router-priority> setting to higher than C<1> in their |
508 | required, bump the C<router-priority> setting to higher than C<1> in their |
346 | local config to route through specific hosts. If C<router-priority> is |
509 | local config to route through specific hosts. If C<router-priority> is |
347 | C<0>, then routing will be refused, so C<1> serves as a "enable, but do |
510 | C<0>, then routing will be refused, so C<1> serves as a "enable, but do |
348 | not use by default" switch. |
511 | not use by default" switch. |
349 | |
512 | |
350 | =item connect = ondemand | never | always | disabled |
513 | =item tcp-port = port-number |
351 | |
514 | |
352 | Sets the connect mode (default: C<always>). It can be C<always> (always |
515 | Similar to C<udp-port> (default: C<655>), but sets the TCP port number. |
353 | try to establish and keep a connection to the given host), C<never> |
|
|
354 | (never initiate a connection to the given host, but accept connections), |
|
|
355 | C<ondemand> (try to establish a connection on the first packet sent, and |
|
|
356 | take it down after the keepalive interval) or C<disabled> (node is bad, |
|
|
357 | don't talk to it). |
|
|
358 | |
516 | |
359 | =item inherit-tos = yes|true|on | no|false|off |
517 | =item udp-port = port-number |
360 | |
518 | |
361 | Wether to inherit the TOS settings of packets sent to the tunnel when |
519 | Sets the port number used by the UDP protocol (default: C<655>, not |
362 | sending packets to this node (default: C<yes>). If set to C<yes> then |
520 | officially assigned by IANA!). |
363 | outgoing tunnel packets will have the same TOS setting as the packets sent |
|
|
364 | to the tunnel device, which is usually what you want. |
|
|
365 | |
|
|
366 | =item compress = yes|true|on | no|false|off |
|
|
367 | |
|
|
368 | Wether to compress data packets sent to this host (default: C<yes>). |
|
|
369 | Compression is really cheap even on slow computers and has no size |
|
|
370 | overhead at all, so enabling this is a good idea. |
|
|
371 | |
|
|
372 | =item max-retry = positive-number |
|
|
373 | |
|
|
374 | The maximum interval in seconds (default: C<28800>, 8 hours) between |
|
|
375 | retries to establish a connection to this node. When a connection cannot |
|
|
376 | be established, gvpe uses exponential backoff capped at this value. It's |
|
|
377 | sometimes useful to set this to a much lower value (e.g. C<120>) on |
|
|
378 | connections to routers that usually are stable but sometimes are down, to |
|
|
379 | assure quick reconnections. |
|
|
380 | |
521 | |
381 | =back |
522 | =back |
382 | |
523 | |
383 | =head1 CONFIG DIRECTORY LAYOUT |
524 | =head1 CONFIG DIRECTORY LAYOUT |
384 | |
525 | |
385 | The default (or recommended) directory layout for the config directory is: |
526 | The default (or recommended) directory layout for the config directory is: |
386 | |
527 | |
387 | =over 4 |
528 | =over 4 |
388 | |
529 | |
389 | =item gvpe.conf |
530 | =item X<gvpe.conf> |
390 | |
531 | |
391 | The config file. |
532 | The config file. |
392 | |
533 | |
393 | =item if-up |
534 | =item X<if-up> |
394 | |
535 | |
395 | The if-up script |
536 | The if-up script |
396 | |
537 | |
397 | =item node-up, node-down |
538 | =item X<node-up>, X<node-down> |
398 | |
539 | |
399 | If used the node up or node-down scripts. |
540 | If used the node up or node-down scripts. |
400 | |
541 | |
401 | =item hostkey |
542 | =item X<hostkey> |
402 | |
543 | |
403 | The private key (taken from C<hostkeys/nodename>) of the current host. |
544 | The private key (taken from C<hostkeys/nodename>) of the current host. |
404 | |
545 | |
405 | =item pubkey/nodename |
546 | =item X<pubkey/nodename> |
406 | |
547 | |
407 | The public keys of the other nodes, one file per node. |
548 | The public keys of the other nodes, one file per node. |
408 | |
549 | |
409 | =back |
550 | =back |
410 | |
551 | |