and they only ConnectTo a third node outside the NAT,
which normally would prevent the peers from learning each other's LAN address.
-Currently, local discovery is implemented by sending broadcast packets to the LAN during path MTU discovery.
-This feature may not work in all possible situations.
+Currently, local discovery is implemented by sending some packets to the local address of the node during UDP discovery.
+This will not work with old nodes that don't transmit their local address.
@cindex LocalDiscoveryAddress
@item LocalDiscoveryAddress <@var{address}>
tinc always assumes a node is reachable over UDP.
Note that tinc will never use UDP with nodes that have TCPOnly enabled.
+@cindex UDPDiscoveryKeepaliveInterval
+@item UDPDiscoveryKeepaliveInterval = <seconds> (9)
+The minimum amount of time between sending UDP ping datagrams to check UDP connectivity once it has been established.
+Note that these pings are large, since they are used to verify link MTU as well.
+
@cindex UDPDiscoveryInterval
-@item UDPDiscoveryInterval = <seconds> (9)
-The minimum amount of time between sending UDP ping datagrams to test UDP connectivity.
+@item UDPDiscoveryInterval = <seconds> (2)
+The minimum amount of time between sending UDP ping datagrams to try to establish UDP connectivity.
@cindex UDPDiscoveryTimeout
@item UDPDiscoveryTimeout = <seconds> (30)
If unspecified, the default is
@file{@value{localstatedir}/run/tinc.@var{netname}.pid}.
+@item --force
+Force some commands to work despite warnings.
+
@item --help
Display a short reminder of runtime options and commands, then terminate.
@cindex add
@item add @var{variable} @var{value}
As above, but without removing any previously existing configuration variables.
+If the variable already exists with the given value, nothing happens.
@cindex del
@item del @var{variable} [@var{value}]
Export all host configuration files to standard output.
@cindex import
-@item import [--force]
+@item import
Import host configuration file(s) generated by the tinc export command from standard input.
Already existing host configuration files are not overwritten unless the option --force is used.
@cindex exchange
-@item exchange [--force]
+@item exchange
The same as export followed by import.
@cindex exchange-all
-@item exchange-all [--force]
+@item exchange-all
The same as export-all followed by import.
@cindex invite
from where it can be redirected to a file or piped through a program that can parse it directly,
such as tcpdump.
-@cindex network [@var{netname}]
-@item network
+@cindex network
+@item network [@var{netname}]
If @var{netname} is given, switch to that network.
Otherwise, display a list of all networks for which configuration files exist.
+@cindex fsck
+@item fsck
+This will check the configuration files for possible problems,
+such as unsafe file permissions, missing executable bit on script,
+unknown and obsolete configuration variables, wrong public and/or private keys, and so on.
+
+When problems are found, this will be printed on a line with WARNING or ERROR in front of it.
+Most problems must be corrected by the user itself, however in some cases (like file permissions and missing public keys),
+tinc will ask if it should fix the problem.
+
@end table
@c ==================================================================