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.\" ======================================================================== |
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.\" |
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.IX Title "GVPE.CONF 5" |
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pcg |
1.17 |
.TH GVPE.CONF 5 "2006-08-02" "2.0" "GNU Virtual Private Ethernet" |
133 |
pcg |
1.1 |
.SH "NAME" |
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gvpe.conf \- configuration file for the GNU VPE daemon |
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.SH "SYNOPSIS" |
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.IX Header "SYNOPSIS" |
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pcg |
1.6 |
.Vb 3 |
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1.1 |
\& udp-port = 407 |
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\& mtu = 1492 |
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\& ifname = vpn0 |
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.Ve |
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.Vb 2 |
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\& node = branch1 |
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\& hostname = 1.2.3.4 |
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.Vb 3 |
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\& node = branch2 |
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\& hostname = www.example.net |
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\& udp-port = 500 # this host uses a different udp-port |
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.Ve |
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.PP |
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.Vb 2 |
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\& node = branch3 |
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\& connect = ondemand |
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.Ve |
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.SH "DESCRIPTION" |
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.IX Header "DESCRIPTION" |
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The gvpe config file consists of a series of lines that contain \f(CW\*(C`variable |
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= value\*(C'\fR pairs. Empty lines are ignored. Comments start with a \f(CW\*(C`#\*(C'\fR and |
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extend to the end of the line. They can be used on their own lines, or |
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pcg |
1.14 |
after any directives. Whitespace is allowed around the \f(CW\*(C`=\*(C'\fR sign or after |
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values, but not within the variable names or values themselves. |
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1.1 |
.PP |
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The only exception to the above is the \*(L"on\*(R" directive that can prefix any |
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\&\f(CW\*(C`name = value\*(C'\fR setting and will only \*(L"execute\*(R" it on the named node, or |
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(if the nodename starts with \*(L"!\*(R") on all nodes except the named one. |
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.PP |
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.Vb 3 |
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\& name = value |
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\& on branch1 loglevel = noise |
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\& on !branch2 connect = ondemand |
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.Ve |
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.PP |
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All settings are executed \*(L"in order\*(R", that is, later settings of the same |
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variable overwrite earlier ones. |
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.SH "ANATOMY OF A CONFIG FILE" |
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.IX Header "ANATOMY OF A CONFIG FILE" |
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Usually, a config file starts with global settings (like the udp port to |
181 |
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listen on), followed by node-specific sections that begin with a \f(CW\*(C`node = |
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nickname\*(C'\fR line. |
183 |
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.PP |
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Every node that is part of the network must have a section that starts |
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with \f(CW\*(C`node = nickname\*(C'\fR. The number and order of the nodes is important |
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and must be the same on all hosts. It is not uncommon for node sections to |
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be completely empty \- if the default values are right. |
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.PP |
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Node-specific settings can be used at any time. If used before the first |
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node section they will set the default values for all following nodes. |
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.SH "CONFIG VARIABLES" |
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.IX Header "CONFIG VARIABLES" |
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.Sh "\s-1GLOBAL\s0 \s-1SETTINGS\s0" |
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.IX Subsection "GLOBAL SETTINGS" |
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Global settings will affect the behaviour of the running gvpe daemon, that |
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is, they are in some sense node-specific (config files can set different |
197 |
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values on different nodes using \f(CW\*(C`on\*(C'\fR), but will affect the behaviour of |
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the gvpe daemon and all connections it creates. |
199 |
pcg |
1.7 |
.IP "dns-forw-host = hostname/ip" 4 |
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.IX Item "dns-forw-host = hostname/ip" |
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The dns server to forward dns requests to for the \s-1DNS\s0 tunnel protocol |
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(default: \f(CW127.0.0.1\fR, changing it is highly recommended). |
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.IP "dns-forw-port = port-number" 4 |
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.IX Item "dns-forw-port = port-number" |
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The port where the \f(CW\*(C`dns\-forw\-host\*(C'\fR is to be contacted (default: \f(CW53\fR, |
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which is fine in most cases). |
207 |
pcg |
1.12 |
.IP "dns-max-outstanding = integer-number-of-requests" 4 |
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.IX Item "dns-max-outstanding = integer-number-of-requests" |
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The maximum number of outstanding \s-1DNS\s0 transport requests |
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(default: \f(CW100\fR). \s-1GVPE\s0 will never issue more requests then the given |
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limit without receiving replies. In heavily overloaded situations it might |
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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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number of parallel requests. |
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.Sp |
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The default should be working ok for most links. |
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.IP "dns-overlap-factor = float" 4 |
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.IX Item "dns-overlap-factor = float" |
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The \s-1DNS\s0 transport uses the minimum request latency (\fBmin_latency\fR) seen |
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during a connection as it's timing base. This factor (default: \f(CW0.5\fR, |
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must be > 0) is multiplied by \fBmin_latency\fR to get the maximum sending |
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rate (= minimum send interval), i.e. a factor of \f(CW1\fR means that a new |
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request might be generated every \fBmin_latency\fR seconds, which means on |
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average there should only ever be one outstanding request. A factor of |
224 |
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\&\f(CW0.5\fR means that \s-1GVPE\s0 will send requests twice as often as the minimum |
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latency measured. |
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.Sp |
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For congested or picky dns forwarders you could use a value nearer to or |
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exceeding \f(CW1\fR. |
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.Sp |
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The default should be working ok for most links. |
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.IP "dns-send-interval = send-interval-in-seconds" 4 |
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.IX Item "dns-send-interval = send-interval-in-seconds" |
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The minimum send interval (= maximum rate) that the \s-1DNS\s0 transport will |
234 |
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use to send new \s-1DNS\s0 requests. \s-1GVPE\s0 will not exceed this rate even when |
235 |
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the latency is very low. The default is \f(CW0.01\fR, which means \s-1GVPE\s0 will |
236 |
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not send more than 100 \s-1DNS\s0 requests per connection per second. For |
237 |
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high-bandwidth links you could go lower, e.g. to \f(CW0.001\fR or so. For |
238 |
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congested or rate-limited links, you might want to go higher, say \f(CW0.1\fR, |
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\&\f(CW0.2\fR or even higher. |
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.Sp |
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The default should be working ok for most links. |
242 |
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.IP "dns-timeout-factor = float" 4 |
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.IX Item "dns-timeout-factor = float" |
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Factor to multiply the \f(CW\*(C`min_latency\*(C'\fR (see \f(CW\*(C`dns\-overlap\-factor\*(C'\fR) by to |
245 |
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get request timeouts. The default of \f(CW8\fR means that the \s-1DNS\s0 transport |
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will resend the request when no reply has been received for longer than |
247 |
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eight times the minimum (= expected) latency, assuming the request or |
248 |
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reply has been lost. |
249 |
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.Sp |
250 |
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For congested links a higher value might be necessary (e.g. \f(CW30\fR). If the |
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link is very stable lower values (e.g. \f(CW2\fR) might work nicely. Values |
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near or below \f(CW1\fR makes no sense whatsoever. |
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.Sp |
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The default should be working ok for most links. |
255 |
pcg |
1.1 |
.IP "if-up = relative-or-absolute-path" 4 |
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.IX Item "if-up = relative-or-absolute-path" |
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Sets the path of a script that should be called immediately after the |
258 |
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network interface is initialized (but not neccessarily up). The following |
259 |
pcg |
1.14 |
environment variables are passed to it (the values are just examples). |
260 |
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.Sp |
261 |
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Variables that have the same value on all nodes: |
262 |
pcg |
1.1 |
.RS 4 |
263 |
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.IP "CONFBASE=/etc/gvpe" 4 |
264 |
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.IX Item "CONFBASE=/etc/gvpe" |
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The configuration base directory. |
266 |
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.IP "IFNAME=vpn0" 4 |
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.IX Item "IFNAME=vpn0" |
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pcg |
1.14 |
The network interface to initialize. |
269 |
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.IP "IFTYPE=native # or tincd" 4 |
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.IX Item "IFTYPE=native # or tincd" |
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.PD 0 |
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.IP "IFSUBTYPE=linux # or freebsd, darwin etc.." 4 |
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.IX Item "IFSUBTYPE=linux # or freebsd, darwin etc.." |
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.PD |
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The interface type (\f(CW\*(C`native\*(C'\fR or \f(CW\*(C`tincd\*(C'\fR) and the subtype (usually the |
276 |
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\&\s-1OS\s0 name in lowercase) that this \s-1GVPE\s0 was configured for. Can be used to |
277 |
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select the correct syntax to use for network-related commands. |
278 |
pcg |
1.1 |
.IP "MTU=1436" 4 |
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.IX Item "MTU=1436" |
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The \s-1MTU\s0 to set the interface to. You can use lower values (if done |
281 |
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consistently on all hosts), but this is usually ineffective. |
282 |
pcg |
1.14 |
.IP "NODES=5" 4 |
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.IX Item "NODES=5" |
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The number of nodes in this \s-1GVPE\s0 network. |
285 |
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.RE |
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.RS 4 |
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.Sp |
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Variables that are node-specific and with values pertaining to the node |
289 |
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running this \s-1GVPE:\s0 |
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.IP "IFUPDATA=string" 4 |
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.IX Item "IFUPDATA=string" |
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The value of the configuration directive \f(CW\*(C`if\-up\-data\*(C'\fR. |
293 |
pcg |
1.1 |
.IP "MAC=fe:fd:80:00:00:01" 4 |
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.IX Item "MAC=fe:fd:80:00:00:01" |
295 |
pcg |
1.14 |
The \s-1MAC\s0 address the network interface has to use. |
296 |
pcg |
1.1 |
.Sp |
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pcg |
1.14 |
Might be used to initialize interfaces on platforms where \s-1GVPE\s0 does not |
298 |
|
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do this automatically. Please see the \f(CW\*(C`gvpe.osdep(5)\*(C'\fR manpage for |
299 |
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platform-specific information. |
300 |
pcg |
1.1 |
.IP "NODENAME=branch1" 4 |
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.IX Item "NODENAME=branch1" |
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pcg |
1.14 |
The nickname of the node. |
303 |
pcg |
1.1 |
.IP "NODEID=1" 4 |
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.IX Item "NODEID=1" |
305 |
pcg |
1.14 |
The numerical node \s-1ID\s0 of the node running this instance of \s-1GVPE\s0. The first |
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node mentioned in the config file gets \s-1ID\s0 1, the second \s-1ID\s0 2 and so on. |
307 |
pcg |
1.1 |
.RE |
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.RS 4 |
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.Sp |
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pcg |
1.14 |
In addition, all node-specific variables (except \f(CW\*(C`NODEID\*(C'\fR) will be |
311 |
|
|
available with a postfix of \f(CW\*(C`_nodeid\*(C'\fR, which contains the value for that |
312 |
|
|
node, e.g. the \f(CW\*(C`MAC_1\*(C'\fR variable contains the \s-1MAC\s0 address of node #1, while |
313 |
|
|
the \f(CW\*(C`NODENAME_22\*(C'\fR variable contains the name of node #22. |
314 |
|
|
.Sp |
315 |
pcg |
1.1 |
Here is a simple if-up script: |
316 |
|
|
.Sp |
317 |
|
|
.Vb 5 |
318 |
|
|
\& #!/bin/sh |
319 |
pcg |
1.14 |
\& ip link set $IFNAME up |
320 |
pcg |
1.1 |
\& [ $NODENAME = branch1 ] && ip addr add 10.0.0.1 dev $IFNAME |
321 |
|
|
\& [ $NODENAME = branch2 ] && ip addr add 10.1.0.1 dev $IFNAME |
322 |
|
|
\& ip route add 10.0.0.0/8 dev $IFNAME |
323 |
|
|
.Ve |
324 |
|
|
.Sp |
325 |
|
|
More complicated examples (using routing to reduce arp traffic) can be |
326 |
|
|
found in the etc/ subdirectory of the distribution. |
327 |
|
|
.RE |
328 |
pcg |
1.7 |
.IP "ifname = devname" 4 |
329 |
|
|
.IX Item "ifname = devname" |
330 |
|
|
Sets the tun interface name to the given name. The default is OS-specific |
331 |
|
|
and most probably something like \f(CW\*(C`tun0\*(C'\fR. |
332 |
|
|
.IP "ifpersist = yes|true|on | no|false|off" 4 |
333 |
|
|
.IX Item "ifpersist = yes|true|on | no|false|off" |
334 |
|
|
Should the tun/tap device be made persistent, that is, should the device |
335 |
|
|
stay up even when gvpe exits? Some versions of the tunnel device have |
336 |
|
|
problems sending packets when gvpe is restarted in persistent mode, so |
337 |
|
|
if the connections can be established but you cannot send packets from |
338 |
|
|
the local node, try to set this to \f(CW\*(C`off\*(C'\fR and do an ifconfig down on the |
339 |
|
|
device. |
340 |
|
|
.IP "ip-proto = numerical-ip-protocol" 4 |
341 |
|
|
.IX Item "ip-proto = numerical-ip-protocol" |
342 |
|
|
Sets the protocol number to be used for the rawip protocol. This is a |
343 |
|
|
global option because all hosts must use the same protocol, and since |
344 |
|
|
there are no port numbers, you cannot easily run more than one gvpe |
345 |
|
|
instance using the same protocol, nor can you share the protocol with |
346 |
|
|
other programs. |
347 |
|
|
.Sp |
348 |
|
|
The default is 47 (\s-1GRE\s0), which has a good chance of tunneling through |
349 |
|
|
firewalls (but note that the rawip protocol is not \s-1GRE\s0 compatible). Other |
350 |
|
|
common choices are 50 (\s-1IPSEC\s0, \s-1ESP\s0), 51 (\s-1IPSEC\s0, \s-1AH\s0), 4 (\s-1IPIP\s0 tunnels) or 98 |
351 |
|
|
(\s-1ENCAP\s0, rfc1241) |
352 |
|
|
.IP "http-proxy-host = hostname/ip" 4 |
353 |
|
|
.IX Item "http-proxy-host = hostname/ip" |
354 |
|
|
The \f(CW\*(C`http\-proxy\-*\*(C'\fR family of options are only available if gvpe was |
355 |
|
|
compiled with the \f(CW\*(C`\-\-enable\-http\-proxy\*(C'\fR option and enable tunneling of |
356 |
|
|
tcp connections through a http proxy server. |
357 |
|
|
.Sp |
358 |
|
|
\&\f(CW\*(C`http\-proxy\-host\*(C'\fR and \f(CW\*(C`http\-proxy\-port\*(C'\fR should specify the hostname and |
359 |
|
|
port number of the proxy server. See \f(CW\*(C`http\-proxy\-loginpw\*(C'\fR if your proxy |
360 |
|
|
requires authentication. |
361 |
|
|
.Sp |
362 |
|
|
Please note that gvpe will still try to resolve all hostnames in the |
363 |
|
|
configuration file, so if you are behind a proxy without access to a dns |
364 |
|
|
server better use numerical \s-1IP\s0 addresses. |
365 |
|
|
.Sp |
366 |
|
|
To make best use of this option disable all protocols except tcp in your |
367 |
|
|
config file and make sure your routers (or all other hosts) are listening |
368 |
|
|
on a port that the proxy allows (443, https, is a common choice). |
369 |
|
|
.Sp |
370 |
|
|
If you have a router, connecting to it will suffice. Otherwise tcp must be |
371 |
|
|
enabled on all hosts. |
372 |
|
|
.Sp |
373 |
|
|
Example: |
374 |
|
|
.Sp |
375 |
|
|
.Vb 3 |
376 |
|
|
\& http-proxy-host = proxy.example.com |
377 |
|
|
\& http-proxy-port = 3128 # 8080 is another common choice |
378 |
|
|
\& http-proxy-auth = schmorp:grumbeere |
379 |
|
|
.Ve |
380 |
|
|
.IP "http-proxy-port = proxy-tcp-port" 4 |
381 |
|
|
.IX Item "http-proxy-port = proxy-tcp-port" |
382 |
|
|
The port where your proxy server listens. |
383 |
|
|
.IP "http-proxy-auth = login:password" 4 |
384 |
|
|
.IX Item "http-proxy-auth = login:password" |
385 |
|
|
The optional login and password used to authenticate to the proxy server, |
386 |
|
|
seperated by a literal colon (\f(CW\*(C`:\*(C'\fR). Only basic authentication is |
387 |
|
|
currently supported. |
388 |
|
|
.IP "keepalive = seconds" 4 |
389 |
|
|
.IX Item "keepalive = seconds" |
390 |
|
|
Sets the keepalive probe interval in seconds (default: \f(CW60\fR). After this |
391 |
|
|
many seconds of inactivity the daemon will start to send keepalive probe |
392 |
|
|
every 5 seconds until it receives a reply from the other end. If no reply |
393 |
|
|
is received within 30 seconds, the peer is considered unreachable and the |
394 |
|
|
connection is closed. |
395 |
|
|
.IP "loglevel = noise|trace|debug|info|notice|warn|error|critical" 4 |
396 |
|
|
.IX Item "loglevel = noise|trace|debug|info|notice|warn|error|critical" |
397 |
|
|
Set the logging level. Connection established messages are logged at level |
398 |
|
|
\&\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. |
399 |
|
|
.IP "mtu = bytes" 4 |
400 |
|
|
.IX Item "mtu = bytes" |
401 |
|
|
Sets the maximum \s-1MTU\s0 that should be used on outgoing packets (basically |
402 |
|
|
the \s-1MTU\s0 of the outgoing interface) The daemon will automatically calculate |
403 |
|
|
maximum overhead (e.g. udp header size, encryption blocksize...) and pass |
404 |
|
|
this information to the \f(CW\*(C`if\-up\*(C'\fR script. |
405 |
|
|
.Sp |
406 |
|
|
Recommended values are 1500 (ethernet), 1492 (pppoe), 1472 (pptp). |
407 |
|
|
.Sp |
408 |
|
|
This value must be the minimum of the mtu values of all hosts. |
409 |
|
|
.IP "node = nickname" 4 |
410 |
|
|
.IX Item "node = nickname" |
411 |
|
|
Not really a config setting but introduces a node section. The nickname is |
412 |
|
|
used to select the right configuration section and must be passed as an |
413 |
|
|
argument to the gvpe daemon. |
414 |
pcg |
1.1 |
.IP "node-up = relative-or-absolute-path" 4 |
415 |
|
|
.IX Item "node-up = relative-or-absolute-path" |
416 |
|
|
Sets a command (default: no script) that should be called whenever a |
417 |
pcg |
1.14 |
connection is established (even on rekeying operations). In addition to |
418 |
|
|
all the variables passed to \f(CW\*(C`if\-up\*(C'\fR scripts, the following environment |
419 |
pcg |
1.1 |
variables will be set: |
420 |
|
|
.RS 4 |
421 |
|
|
.IP "DESTNODE=branch2" 4 |
422 |
|
|
.IX Item "DESTNODE=branch2" |
423 |
|
|
The name of the remote node. |
424 |
|
|
.IP "DESTID=2" 4 |
425 |
|
|
.IX Item "DESTID=2" |
426 |
|
|
The node id of the remote node. |
427 |
|
|
.IP "DESTIP=188.13.66.8" 4 |
428 |
|
|
.IX Item "DESTIP=188.13.66.8" |
429 |
|
|
The numerical \s-1IP\s0 address of the remote host (gvpe accepts connections from |
430 |
|
|
everywhere, as long as the other host can authenticate itself). |
431 |
|
|
.IP "DESTPORT=655 # deprecated" 4 |
432 |
|
|
.IX Item "DESTPORT=655 # deprecated" |
433 |
|
|
The \s-1UDP\s0 port used by the other side. |
434 |
|
|
.IP "STATE=UP" 4 |
435 |
|
|
.IX Item "STATE=UP" |
436 |
|
|
Node-up scripts get called with STATE=UP, node-down scripts get called |
437 |
|
|
with STATE=DOWN. |
438 |
|
|
.RE |
439 |
|
|
.RS 4 |
440 |
|
|
.Sp |
441 |
|
|
Here is a nontrivial example that uses nsupdate to update the name => ip |
442 |
|
|
mapping in some dns zone: |
443 |
|
|
.Sp |
444 |
|
|
.Vb 6 |
445 |
|
|
\& #!/bin/sh |
446 |
|
|
\& { |
447 |
|
|
\& echo update delete $DESTNODE.lowttl.example.net. a |
448 |
|
|
\& echo update add $DESTNODE.lowttl.example.net. 1 in a $DESTIP |
449 |
|
|
\& echo |
450 |
|
|
\& } | nsupdate -d -k $CONFBASE:key.example.net. |
451 |
|
|
.Ve |
452 |
|
|
.RE |
453 |
|
|
.IP "node-down = relative-or-absolute-path" 4 |
454 |
|
|
.IX Item "node-down = relative-or-absolute-path" |
455 |
|
|
Same as \f(CW\*(C`node\-up\*(C'\fR, but gets called whenever a connection is lost. |
456 |
|
|
.IP "pid-file = path" 4 |
457 |
|
|
.IX Item "pid-file = path" |
458 |
pcg |
1.7 |
The path to the pid file to check and create |
459 |
|
|
(default: \f(CW\*(C`LOCALSTATEDIR/run/gvpe.pid\*(C'\fR). |
460 |
|
|
.IP "private-key = relative-path-to-key" 4 |
461 |
|
|
.IX Item "private-key = relative-path-to-key" |
462 |
|
|
Sets the path (relative to the config directory) to the private key |
463 |
|
|
(default: \f(CW\*(C`hostkey\*(C'\fR). This is a printf format string so every \f(CW\*(C`%\*(C'\fR must |
464 |
|
|
be doubled. A single \f(CW%s\fR is replaced by the hostname, so you could |
465 |
|
|
use paths like \f(CW\*(C`hostkeys/%s\*(C'\fR to fetch the files at the location where |
466 |
|
|
\&\f(CW\*(C`gvpectrl\*(C'\fR puts them. |
467 |
|
|
.Sp |
468 |
|
|
Since only the private key file of the current node is used and the |
469 |
|
|
private key file should be kept secret per-host to avoid spoofings, it is |
470 |
|
|
not recommended to use this feature. |
471 |
|
|
.IP "rekey = seconds" 4 |
472 |
|
|
.IX Item "rekey = seconds" |
473 |
|
|
Sets the rekeying interval in seconds (default: \f(CW3600\fR). Connections are |
474 |
|
|
reestablished every \f(CW\*(C`rekey\*(C'\fR seconds. |
475 |
pcg |
1.1 |
.Sh "\s-1NODE\s0 \s-1SPECIFIC\s0 \s-1SETTINGS\s0" |
476 |
|
|
.IX Subsection "NODE SPECIFIC SETTINGS" |
477 |
|
|
The following settings are node\-specific, that is, every node can have |
478 |
|
|
different settings, even within the same gvpe instance. Settings that are |
479 |
pcg |
1.16 |
set before the first node section set the defaults, settings that are |
480 |
|
|
set within a node section only apply to the given node. |
481 |
|
|
.IP "allow-direct = nodename" 4 |
482 |
|
|
.IX Item "allow-direct = nodename" |
483 |
|
|
Allow direct connections to this node. See \f(CW\*(C`deny\-direct\*(C'\fR for more info. |
484 |
pcg |
1.7 |
.IP "compress = yes|true|on | no|false|off" 4 |
485 |
|
|
.IX Item "compress = yes|true|on | no|false|off" |
486 |
|
|
Wether to compress data packets sent to this host (default: \f(CW\*(C`yes\*(C'\fR). |
487 |
|
|
Compression is really cheap even on slow computers and has no size |
488 |
|
|
overhead at all, so enabling this is a good idea. |
489 |
|
|
.IP "connect = ondemand | never | always | disabled" 4 |
490 |
|
|
.IX Item "connect = ondemand | never | always | disabled" |
491 |
|
|
Sets the connect mode (default: \f(CW\*(C`always\*(C'\fR). It can be \f(CW\*(C`always\*(C'\fR (always |
492 |
|
|
try to establish and keep a connection to the given host), \f(CW\*(C`never\*(C'\fR |
493 |
|
|
(never initiate a connection to the given host, but accept connections), |
494 |
|
|
\&\f(CW\*(C`ondemand\*(C'\fR (try to establish a connection on the first packet sent, and |
495 |
|
|
take it down after the keepalive interval) or \f(CW\*(C`disabled\*(C'\fR (node is bad, |
496 |
|
|
don't talk to it). |
497 |
pcg |
1.16 |
.IP "deny-direct = nodename | *" 4 |
498 |
|
|
.IX Item "deny-direct = nodename | *" |
499 |
|
|
Deny direct connections to the specified node (or all nodes when \f(CW\*(C`*\*(C'\fR |
500 |
|
|
is given). Only one node can be specified, but you can use multiple |
501 |
|
|
\&\f(CW\*(C`allow\-direct\*(C'\fR and \f(CW\*(C`deny\-direct\*(C'\fR statements. This only makes sense in |
502 |
|
|
networks with routers, as routers are required for indirect connections. |
503 |
|
|
.Sp |
504 |
|
|
Sometimes, a node cannot reach some other nodes for reasons of network |
505 |
|
|
connectivity. For example, a node behind a firewall that only allows |
506 |
|
|
conenctions to/from a single other node in the network. In this case one |
507 |
|
|
should specify \f(CW\*(C`deny\-direct = *\*(C'\fR and \f(CW\*(C`allow\-direct = othernodename\*(C'\fR (the other |
508 |
|
|
node \fImust\fR be a router for this to work). |
509 |
|
|
.Sp |
510 |
|
|
The algorithm to check wether a connection may be direct is as follows: |
511 |
|
|
.Sp |
512 |
|
|
1. Other node mentioned in a \f(CW\*(C`allow\-direct\*(C'\fR? If yes, allow the connection. |
513 |
|
|
.Sp |
514 |
|
|
2. Other node mentioned in a \f(CW\*(C`deny\-direct\*(C'\fR? If yes, deny direct connections. |
515 |
|
|
.Sp |
516 |
|
|
3. Allow the connection. |
517 |
|
|
.Sp |
518 |
pcg |
1.17 |
That is, \f(CW\*(C`allow\-direct\*(C'\fR takes precedence over \f(CW\*(C`deny\-direct\*(C'\fR. |
519 |
pcg |
1.16 |
.Sp |
520 |
|
|
The check is done in both directions, i.e. both nodes must allow a direct |
521 |
|
|
connection before one is attempted, so you only need to specify connect |
522 |
|
|
limitations on one node. |
523 |
pcg |
1.7 |
.IP "dns-domain = domain-suffix" 4 |
524 |
|
|
.IX Item "dns-domain = domain-suffix" |
525 |
pcg |
1.8 |
The \s-1DNS\s0 domain suffix that points to the \s-1DNS\s0 tunnel server for this node. |
526 |
pcg |
1.7 |
.Sp |
527 |
|
|
The domain must point to a \s-1NS\s0 record that points to the \fIdns-hostname\fR, |
528 |
|
|
i.e. |
529 |
|
|
.Sp |
530 |
|
|
.Vb 2 |
531 |
|
|
\& dns-domainname = tunnel.example.net |
532 |
|
|
\& dns-hostname = tunnel-server.example.net |
533 |
|
|
.Ve |
534 |
|
|
.Sp |
535 |
|
|
Corresponds to the following \s-1DNS\s0 entries in the \f(CW\*(C`example.net\*(C'\fR domain: |
536 |
|
|
.Sp |
537 |
|
|
.Vb 2 |
538 |
|
|
\& tunnel.example.net. NS tunnel-server.example.net. |
539 |
|
|
\& tunnel-server.example.net. A 13.13.13.13 |
540 |
|
|
.Ve |
541 |
|
|
.IP "dns-hostname = hostname/ip" 4 |
542 |
|
|
.IX Item "dns-hostname = hostname/ip" |
543 |
|
|
The address to bind the \s-1DNS\s0 tunnel socket to, similar to the \f(CW\*(C`hostname\*(C'\fR, |
544 |
|
|
but for the \s-1DNS\s0 tunnel protocol only. Default: \f(CW0.0.0.0\fR, but that might |
545 |
|
|
change. |
546 |
|
|
.IP "dns-port = port-number" 4 |
547 |
|
|
.IX Item "dns-port = port-number" |
548 |
pcg |
1.8 |
The port to bind the \s-1DNS\s0 tunnel socket to. Must be \f(CW53\fR on \s-1DNS\s0 tunnel servers. |
549 |
|
|
.IP "enable-dns = yes|true|on | no|false|off" 4 |
550 |
|
|
.IX Item "enable-dns = yes|true|on | no|false|off" |
551 |
pcg |
1.10 |
See \fIgvpe.protocol\fR\|(7) for a description of the \s-1DNS\s0 transport |
552 |
|
|
protocol. Avoid this protocol if you can. |
553 |
|
|
.Sp |
554 |
pcg |
1.8 |
Enable the \s-1DNS\s0 tunneling protocol on this node, either as server or as |
555 |
pcg |
1.10 |
client. Support for this transport protocol is only available when gvpe |
556 |
|
|
was compiled using the \f(CW\*(C`\-\-enable\-dns\*(C'\fR option. |
557 |
|
|
.IP "enable-icmp = yes|true|on | no|false|off" 4 |
558 |
|
|
.IX Item "enable-icmp = yes|true|on | no|false|off" |
559 |
|
|
See \fIgvpe.protocol\fR\|(7) for a description of the \s-1ICMP\s0 transport protocol. |
560 |
pcg |
1.8 |
.Sp |
561 |
pcg |
1.10 |
Enable the \s-1ICMP\s0 transport using icmp packets of type \f(CW\*(C`icmp\-type\*(C'\fR on this |
562 |
|
|
node. |
563 |
pcg |
1.1 |
.IP "enable-rawip = yes|true|on | no|false|off" 4 |
564 |
|
|
.IX Item "enable-rawip = yes|true|on | no|false|off" |
565 |
pcg |
1.10 |
See \fIgvpe.protocol\fR\|(7) for a description of the \s-1RAW\s0 \s-1IP\s0 transport protocol. |
566 |
|
|
.Sp |
567 |
pcg |
1.1 |
Enable the \s-1RAW\s0 IPv4 transport using the \f(CW\*(C`ip\-proto\*(C'\fR protocol |
568 |
pcg |
1.10 |
(default: \f(CW\*(C`no\*(C'\fR). |
569 |
pcg |
1.7 |
.IP "enable-tcp = yes|true|on | no|false|off" 4 |
570 |
|
|
.IX Item "enable-tcp = yes|true|on | no|false|off" |
571 |
pcg |
1.10 |
See \fIgvpe.protocol\fR\|(7) for a description of the \s-1TCP\s0 transport protocol. |
572 |
|
|
.Sp |
573 |
pcg |
1.7 |
Enable the TCPv4 transport using the \f(CW\*(C`tcp\-port\*(C'\fR port |
574 |
pcg |
1.10 |
(default: \f(CW\*(C`no\*(C'\fR). Support for this transport protocol is only available |
575 |
|
|
when gvpe was compiled using the \f(CW\*(C`\-\-enable\-tcp\*(C'\fR option. |
576 |
pcg |
1.1 |
.IP "enable-udp = yes|true|on | no|false|off" 4 |
577 |
|
|
.IX Item "enable-udp = yes|true|on | no|false|off" |
578 |
pcg |
1.10 |
See \fIgvpe.protocol\fR\|(7) for a description of the \s-1UDP\s0 transport protocol. |
579 |
|
|
.Sp |
580 |
pcg |
1.6 |
Enable the UDPv4 transport using the \f(CW\*(C`udp\-port\*(C'\fR port (default: \f(CW\*(C`no\*(C'\fR, |
581 |
|
|
unless no other protocol is enabled for a node, in which case this |
582 |
pcg |
1.10 |
protocol is enabled automatically). |
583 |
pcg |
1.6 |
.Sp |
584 |
|
|
\&\s-1NOTE:\s0 Please specify \f(CW\*(C`enable\-udp = yes\*(C'\fR if you want t use it even though |
585 |
|
|
it might get switched on automatically, as some future version might |
586 |
|
|
default to another default protocol. |
587 |
pcg |
1.16 |
.IP "hostname = hostname | ip [can not be defaulted]" 4 |
588 |
|
|
.IX Item "hostname = hostname | ip [can not be defaulted]" |
589 |
|
|
Forces the address of this node to be set to the given dns hostname or ip |
590 |
|
|
address. It will be resolved before each connect request, so dyndns should |
591 |
|
|
work fine. If this setting is not specified and a router is available, |
592 |
|
|
then the router will be queried for the address of this node. Otherwise, |
593 |
|
|
the connection attempt will fail. |
594 |
pcg |
1.11 |
.IP "icmp-type = integer" 4 |
595 |
|
|
.IX Item "icmp-type = integer" |
596 |
|
|
Sets the type value to be used for outgoing (and incoming) packets sent |
597 |
|
|
via the \s-1ICMP\s0 transport. |
598 |
|
|
.Sp |
599 |
|
|
The default is \f(CW0\fR (which is \f(CW\*(C`echo\-reply\*(C'\fR, also known as |
600 |
|
|
\&\*(L"ping\-replies\*(R"). Other useful values include \f(CW8\fR (\f(CW\*(C`echo\-request\*(C'\fR, a.k.a. |
601 |
|
|
\&\*(L"ping\*(R") and \f(CW11\fR (\f(CW\*(C`time\-exceeded\*(C'\fR), but any 8\-bit value can be used. |
602 |
pcg |
1.14 |
.IP "if-up-data = value" 4 |
603 |
|
|
.IX Item "if-up-data = value" |
604 |
|
|
The value specified using this directive will be passed to the \f(CW\*(C`if\-up\*(C'\fR |
605 |
|
|
script in the environment variable \f(CW\*(C`IFUPDATA\*(C'\fR. |
606 |
pcg |
1.7 |
.IP "inherit-tos = yes|true|on | no|false|off" 4 |
607 |
|
|
.IX Item "inherit-tos = yes|true|on | no|false|off" |
608 |
|
|
Wether to inherit the \s-1TOS\s0 settings of packets sent to the tunnel when |
609 |
|
|
sending packets to this node (default: \f(CW\*(C`yes\*(C'\fR). If set to \f(CW\*(C`yes\*(C'\fR then |
610 |
|
|
outgoing tunnel packets will have the same \s-1TOS\s0 setting as the packets sent |
611 |
|
|
to the tunnel device, which is usually what you want. |
612 |
|
|
.IP "max-retry = positive-number" 4 |
613 |
|
|
.IX Item "max-retry = positive-number" |
614 |
pcg |
1.8 |
The maximum interval in seconds (default: \f(CW3600\fR, one hour) between |
615 |
pcg |
1.7 |
retries to establish a connection to this node. When a connection cannot |
616 |
|
|
be established, gvpe uses exponential backoff capped at this value. It's |
617 |
|
|
sometimes useful to set this to a much lower value (e.g. \f(CW120\fR) on |
618 |
|
|
connections to routers that usually are stable but sometimes are down, to |
619 |
pcg |
1.8 |
assure quick reconnections even after longer downtimes. |
620 |
|
|
.IP "router-priority = 0 | 1 | positive\-number>=2" 4 |
621 |
|
|
.IX Item "router-priority = 0 | 1 | positive-number>=2" |
622 |
pcg |
1.1 |
Sets the router priority of the given host (default: \f(CW0\fR, disabled). If |
623 |
|
|
some host tries to connect to another host without a hostname, it asks |
624 |
|
|
the router host for it's \s-1IP\s0 address. The router host is the one with the |
625 |
pcg |
1.2 |
highest priority larger than \f(CW1\fR that is currently reachable. |
626 |
|
|
.Sp |
627 |
|
|
Make sure all hosts always connect (\f(CW\*(C`connect = always\*(C'\fR) to the router |
628 |
|
|
hosts, otherwise connecting to them might be impossible. |
629 |
|
|
.Sp |
630 |
|
|
The special value \f(CW1\fR allows other hosts to route through the router |
631 |
|
|
host, but they will never route through it by default. The value \f(CW0\fR |
632 |
|
|
disables routing. The idea behind this is that some hosts can, if |
633 |
|
|
required, bump the \f(CW\*(C`router\-priority\*(C'\fR setting to higher than \f(CW1\fR in their |
634 |
|
|
local config to route through specific hosts. If \f(CW\*(C`router\-priority\*(C'\fR is |
635 |
|
|
\&\f(CW0\fR, then routing will be refused, so \f(CW1\fR serves as a \*(L"enable, but do |
636 |
|
|
not use by default\*(R" switch. |
637 |
pcg |
1.7 |
.IP "tcp-port = port-number" 4 |
638 |
|
|
.IX Item "tcp-port = port-number" |
639 |
|
|
Similar to \f(CW\*(C`udp\-port\*(C'\fR (default: \f(CW655\fR), but sets the \s-1TCP\s0 port number. |
640 |
|
|
.IP "udp-port = port-number" 4 |
641 |
|
|
.IX Item "udp-port = port-number" |
642 |
|
|
Sets the port number used by the \s-1UDP\s0 protocol (default: \f(CW655\fR, not |
643 |
|
|
officially assigned by \s-1IANA\s0!). |
644 |
pcg |
1.1 |
.SH "CONFIG DIRECTORY LAYOUT" |
645 |
|
|
.IX Header "CONFIG DIRECTORY LAYOUT" |
646 |
|
|
The default (or recommended) directory layout for the config directory is: |
647 |
pcg |
1.4 |
.IP "\(bu" 4 |
648 |
|
|
.IX Xref "gvpe.conf" |
649 |
pcg |
1.1 |
The config file. |
650 |
pcg |
1.4 |
.IP "\(bu" 4 |
651 |
|
|
.IX Xref "if-up" |
652 |
pcg |
1.1 |
The if-up script |
653 |
pcg |
1.4 |
.IP "," 4 |
654 |
|
|
.IX Xref "node-up node-down" |
655 |
pcg |
1.1 |
If used the node up or node-down scripts. |
656 |
pcg |
1.4 |
.IP "\(bu" 4 |
657 |
|
|
.IX Xref "hostkey" |
658 |
pcg |
1.1 |
The private key (taken from \f(CW\*(C`hostkeys/nodename\*(C'\fR) of the current host. |
659 |
pcg |
1.4 |
.IP "\(bu" 4 |
660 |
|
|
.IX Xref "pubkey nodename" |
661 |
pcg |
1.1 |
The public keys of the other nodes, one file per node. |
662 |
|
|
.SH "SEE ALSO" |
663 |
|
|
.IX Header "SEE ALSO" |
664 |
|
|
\&\fIgvpe\fR\|(5), \fIgvpe\fR\|(8), \fIgvpectrl\fR\|(8). |
665 |
|
|
.SH "AUTHOR" |
666 |
|
|
.IX Header "AUTHOR" |
667 |
pcg |
1.15 |
Marc Lehmann <gvpe@schmorp.de> |