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Comparing gvpe/doc/gvpe.conf.5.pod (file contents):
Revision 1.23 by pcg, Mon Mar 23 15:22:00 2009 UTC vs.
Revision 1.28 by root, Sun Mar 6 19:40:27 2011 UTC

28= value> pairs. Empty lines are ignored. Comments start with a C<#> and 28= value> pairs. Empty lines are ignored. Comments start with a C<#> and
29extend to the end of the line. They can be used on their own lines, or 29extend to the end of the line. They can be used on their own lines, or
30after any directives. Whitespace is allowed around the C<=> sign or after 30after any directives. Whitespace is allowed around the C<=> sign or after
31values, but not within the variable names or values themselves. 31values, but not within the variable names or values themselves.
32 32
33The only exception to the above is the "on" directive that can prefix any 33All settings are applied "in order", that is, later settings of the same
34C<name = value> setting and will only "execute" it on the named node, or 34variable overwrite earlier ones.
35(if the nodename starts with "!") on all nodes except the named one.
36 35
36The only exceptions to the above are the "on" and "include" directives:
37
38=over 4
39
40=item on nodename ...
41
42=item on !nodename ...
43
44You can prefix any configuration directive with C<on> and a nodename. GVPE
45will will only "execute" it on the named node, or (if the nodename starts
46with C<!>) on all nodes except the named one.
47
37For example, set the MTU to C<1450> everywhere, loglevel to C<noise> on 48Example: set the MTU to C<1450> everywhere, C<loglevel> to C<noise> on
38branch1, and connect to C<ondemand> everywhere but on branch2: 49C<branch1>, and C<connect> to C<ondemand> everywhere but on branch2.
39 50
40 mtu = 1450 51 mtu = 1450
41 on branch1 loglevel = noise 52 on branch1 loglevel = noise
42 on !branch2 connect = ondemand 53 on !branch2 connect = ondemand
43 54
44All settings are applied "in order", that is, later settings of the same 55=item include relative-or-absolute-path
45variable overwrite earlier ones. 56
57Reads the specified file (the path must not contain whitespace or C<=>
58characters) and evaluate all config directives in it as if they were
59spelled out in place of the C<include> directive.
60
61The path is a printf format string, that is, you must escape any C<%>
62by doubling it, and you can have a single C<%s> inside, which will be
63replaced by the current nodename.
64
65Relative paths are interpreted relative to the GVPE config directory.
66
67Example: include the file F<local.conf> in the config directory on every
68node.
69
70 include local.conf
71
72Example: include a file F<conf/>nodenameF<.conf>
73
74 include conf/%s.conf
75
76=back
46 77
47=head1 ANATOMY OF A CONFIG FILE 78=head1 ANATOMY OF A CONFIG FILE
48 79
49Usually, a config file starts with a few global settings (like the UDP 80Usually, a config file starts with a few global settings (like the UDP
50port to listen on), followed by node-specific sections that begin with a 81port to listen on), followed by node-specific sections that begin with a
76 107
77=item dns-forw-port = port-number 108=item dns-forw-port = port-number
78 109
79The port where the C<dns-forw-host> is to be contacted (default: C<53>, 110The port where the C<dns-forw-host> is to be contacted (default: C<53>,
80which is fine in most cases). 111which is fine in most cases).
112
113=item dns-case-preserving = yes|true|on | no|false|off
114
115Sets whether the DNS transport forwarding server preserves case (DNS
116servers have to, but some access systems are even more broken than others)
117(default: true).
118
119Normally, when the forwarding server changes the case of domain names then
120GVPE will automatically set this to false.
81 121
82=item dns-max-outstanding = integer-number-of-requests 122=item dns-max-outstanding = integer-number-of-requests
83 123
84The maximum number of outstanding DNS transport requests 124The maximum number of outstanding DNS transport requests
85(default: C<100>). GVPE will never issue more requests then the given 125(default: C<100>). GVPE will never issue more requests then the given
237other programs. 277other programs.
238 278
239The default is 47 (GRE), which has a good chance of tunneling 279The default is 47 (GRE), which has a good chance of tunneling
240through firewalls (but note that gvpe's rawip protocol is not GRE 280through firewalls (but note that gvpe's rawip protocol is not GRE
241compatible). Other common choices are 50 (IPSEC, ESP), 51 (IPSEC, AH), 4 281compatible). Other common choices are 50 (IPSEC, ESP), 51 (IPSEC, AH), 4
242(IPIP tunnels) or 98 (ENCAP, rfc1241) 282(IPIP tunnels) or 98 (ENCAP, rfc1241).
283
284Many versions of Linux seem to have a bug that causes them to reorder
285packets for some ip protocols (GRE, ESP) but not for others (AH), so
286choose wisely (that is, use 51, AH).
243 287
244=item http-proxy-host = hostname/ip 288=item http-proxy-host = hostname/ip
245 289
246The C<http-proxy-*> family of options are only available if gvpe was 290The C<http-proxy-*> family of options are only available if gvpe was
247compiled with the C<--enable-http-proxy> option and enable tunneling of 291compiled with the C<--enable-http-proxy> option and enable tunneling of
314is established (even on rekeying operations). Note that node-up/down 358is established (even on rekeying operations). Note that node-up/down
315scripts will be run asynchronously, but execution is serialised, so there 359scripts will be run asynchronously, but execution is serialised, so there
316will only ever be one such script running. 360will only ever be one such script running.
317 361
318In addition to all the variables passed to C<if-up> scripts, the following 362In addition to all the variables passed to C<if-up> scripts, the following
319environment variables will be set: 363environment variables will be set (values are just examples):
320 364
321=over 4 365=over 4
322 366
323=item DESTNODE=branch2 367=item DESTNODE=branch2
324 368
325The name of the remote node. 369The name of the remote node.
326 370
327=item DESTID=2 371=item DESTID=2
328 372
329The node id of the remote node. 373The node id of the remote node.
374
375=item DESTSI=rawip/88.99.77.55:0
376
377The "socket info" of the target node, protocol dependent but usually in
378the format protocol/ip:port.
330 379
331=item DESTIP=188.13.66.8 380=item DESTIP=188.13.66.8
332 381
333The numerical IP address of the remote node (gvpe accepts connections from 382The numerical IP address of the remote node (gvpe accepts connections from
334everywhere, as long as the other node can authenticate itself). 383everywhere, as long as the other node can authenticate itself).
335 384
336=item DESTPORT=655 # deprecated 385=item DESTPORT=655 # deprecated
337 386
338The UDP port used by the other side. 387The protocol port used by the other side, if applicable.
339 388
340=item STATE=UP 389=item STATE=up
341 390
342Node-up scripts get called with STATE=UP, node-down scripts get called 391Node-up scripts get called with STATE=up, node-change scripts get called
343with STATE=DOWN. 392with STATE=change and node-down scripts get called with STATE=down.
344 393
345=back 394=back
346 395
347Here is a nontrivial example that uses nsupdate to update the name => ip 396Here is a nontrivial example that uses nsupdate to update the name => ip
348mapping in some DNS zone: 397mapping in some DNS zone:
352 echo update delete $DESTNODE.lowttl.example.net. a 401 echo update delete $DESTNODE.lowttl.example.net. a
353 echo update add $DESTNODE.lowttl.example.net. 1 in a $DESTIP 402 echo update add $DESTNODE.lowttl.example.net. 1 in a $DESTIP
354 echo 403 echo
355 } | nsupdate -d -k $CONFBASE:key.example.net. 404 } | nsupdate -d -k $CONFBASE:key.example.net.
356 405
406=item node-change = relative-or-absolute-path
407
408Same as C<node-change>, but gets called whenever something about a
409connection changes (such as the source IP address).
410
357=item node-down = relative-or-absolute-path 411=item node-down = relative-or-absolute-path
358 412
359Same as C<node-up>, but gets called whenever a connection is lost. 413Same as C<node-up>, but gets called whenever a connection is lost.
360 414
361=item pid-file = path 415=item pid-file = path
410 464
411Allow direct connections to this node. See C<deny-direct> for more info. 465Allow direct connections to this node. See C<deny-direct> for more info.
412 466
413=item compress = yes|true|on | no|false|off 467=item compress = yes|true|on | no|false|off
414 468
469For the current node, this specified whether it will accept compressed
470packets, and for all other nodes, this specifies whether to try to
415Wether to compress data packets sent to this node (default: C<yes>). 471compress data packets sent to this node (default: C<yes>). Compression is
416Compression is really cheap even on slow computers and has no size 472really cheap even on slow computers, has no size overhead at all and will
417overhead at all, so enabling this is often a good idea. 473only be used when the other side supports compression, so enabling this is
474often a good idea.
418 475
419=item connect = ondemand | never | always | disabled 476=item connect = ondemand | never | always | disabled
420 477
421Sets the connect mode (default: C<always>). It can be C<always> (always 478Sets the connect mode (default: C<always>). It can be C<always> (always
422try to establish and keep a connection to the given node), C<never> 479try to establish and keep a connection to the given node), C<never>
513 570
514=item enable-udp = yes|true|on | no|false|off 571=item enable-udp = yes|true|on | no|false|off
515 572
516See gvpe.protocol(7) for a description of the UDP transport protocol. 573See gvpe.protocol(7) for a description of the UDP transport protocol.
517 574
518Enable the UDPv4 transport using the C<udp-port> port (default: C<no>, 575Enable the UDPv4 transport using the C<udp-port> port (default: C<no>).
519unless no other protocol is enabled for a node, in which case this
520protocol is enabled automatically).
521
522NOTE: Please specify C<enable-udp = yes> if you want to use it even though
523it might get switched on automatically, as some future version might
524default to another default protocol.
525 576
526=item hostname = hostname | ip [can not be defaulted] 577=item hostname = hostname | ip [can not be defaulted]
527 578
528Forces the address of this node to be set to the given DNS hostname or IP 579Forces the address of this node to be set to the given DNS hostname or IP
529address. It will be resolved before each connect request, so dyndns should 580address. It will be resolved before each connect request, so dyndns should
548The value specified using this directive will be passed to the C<if-up> 599The value specified using this directive will be passed to the C<if-up>
549script in the environment variable C<IFUPDATA>. 600script in the environment variable C<IFUPDATA>.
550 601
551=item inherit-tos = yes|true|on | no|false|off 602=item inherit-tos = yes|true|on | no|false|off
552 603
553Wether to inherit the TOS settings of packets sent to the tunnel when 604Whether to inherit the TOS settings of packets sent to the tunnel when
554sending packets to this node (default: C<yes>). If set to C<yes> then 605sending packets to this node (default: C<yes>). If set to C<yes> then
555outgoing tunnel packets will have the same TOS setting as the packets sent 606outgoing tunnel packets will have the same TOS setting as the packets sent
556to the tunnel device, which is usually what you want. 607to the tunnel device, which is usually what you want.
557 608
558=item max-retry = positive-number 609=item max-retry = positive-number

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