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       anytun-config - anycast tunneling configuration utility


         [ -h|--help ]
         [ -L|--log <target>:<level>[,<param1>[,<param2>[..]]]
         [ -U|--debug ]
         [ -r|--remote-host <hostname|ip> ]
         [ -o|--remote-port <port> ]
         [ -4|--ipv4-only ]
         [ -6|--ipv6-only ]
         [ -R|--route <net>/<prefix length> ]
         [ -m|--mux <mux-id> ]
         [ -w|--window-size <window size> ]
         [ -k|--kd-prf <kd-prf type> ]
         [ -e|--role <role> ]
         [ -E|--passphrase <pass phrase> ]
         [ -K|--key <master key> ]
         [ -A|--salt <master salt> ]


       anytun-config writes routing/connection table entries, that can be read
       by anytun-controld.


       -L, --log <target>:<level>[,<param1>[,<param2>[..]]]
           add log target to logging system. This can be invoked several times
           in order to log to different targets at the same time. Every target
           hast its own log level which is a number between 0 and 5. Where 0
           means disabling log and 5 means debug messages are enabled.

           The file target can be used more the once with different levels. If
           no target is provided at the command line a single target with the
           config syslog:3,anytun-config,daemon is added.

           The following targets are supported:

               log to syslog daemon, parameters

               log to file, parameters <level>[,<path>]

               log to standard output, parameters <level>

               log to standard error, parameters <level>

       -U, --debug
           This option instructs Anytun to run in debug mode. It implicits -D
           (don’t daemonize) and adds a log target with the configuration
           stdout:5 (logging with maximum level). In future releases there
           might be additional output when this option is supplied.

       -r, --remote-host <hostname|ip>
           This option can be used to specify the remote tunnel endpoint. In
           case of anycast tunnel endpoints, the anycast IP address has to be
           used. If you do not specify an address, it is automatically
           determined after receiving the first data packet.

       -o, --remote-port <port>
           The UDP port used for payload data by the remote host (specified
           with -p on the remote host). If you do not specify a port, it is
           automatically determined after receiving the first data packet.

       -4, --ipv4-only
           Resolv to IPv4 addresses only. The default is to resolv both IPv4
           and IPv6 addresses.

       -6, --ipv6-only
           Resolv to IPv6 addresses only. The default is to resolv both IPv4
           and IPv6 addresses.

       -R, --route <net>/<prefix length>
           add a route to connection. This can be invoked several times.

       -m, --mux <mux-id>
           the multiplex id to use. default: 0

       -w, --window-size <window size>
           seqence window size

           Sometimes, packets arrive out of order on the receiver side. This
           option defines the size of a list of received packets´ sequence
           numbers. If, according to this list, a received packet has been
           previously received or has been transmitted in the past, and is
           therefore not in the list anymore, this is interpreted as a replay
           attack and the packet is dropped. A value of 0 deactivates this
           list and, as a consequence, the replay protection employed by
           filtering packets according to their secuence number. By default
           the sequence window is disabled and therefore a window size of 0 is

       -k, --kdprf <kd-prf type>
           key derivation pseudo random function

           The pseudo random function which is used for calculating the
           session keys and session salt.

           Possible values:

               no random function, keys and salt are set to 0..00

               AES in counter mode with 128 Bits, default value

               AES in counter mode with 128 Bits

               AES in counter mode with 192 Bits

               AES in counter mode with 256 Bits

       -e, --role <role>
           SATP uses different session keys for inbound and outbound traffic.
           The role parameter is used to determine which keys to use for
           outbound or inbound packets. On both sides of a vpn connection
           different roles have to be used. Possible values are left and
           right. You may also use alice or server as a replacement for left
           and bob or client as a replacement for right. By default left is

       -E, --passphrase <pass phrase>
           This passphrase is used to generate the master key and master salt.
           For the master key the last n bits of the SHA256 digest of the
           passphrase (where n is the length of the master key in bits) is
           used. The master salt gets generated with the SHA1 digest. You may
           force a specific key and or salt by using --key and --salt.

       -K, --key <master key>
           master key to use for key derivation

           Master key in hexadecimal notation, e.g.
           01a2b3c4d5e6f708a9b0cadbecfd0fa1, with a mandatory length of 32, 48
           or 64 characters (128, 192 or 256 bits).

       -A, --salt <master salt>
           master salt to use for key derivation

           Master salt in hexadecimal notation, e.g.
           01a2b3c4d5e6f708a9b0cadbecfd, with a mandatory length of 28
           characters (14 bytes).


       Add a client with Connection ID (Mux) 12 and add 2 Routes to this

           # anytun-config -w 0 -m 12 -K 0123456789ABCDEFFEDCBA9876543210 -A 0123456789ABCDDCBA9876543210 \
                           -R -R -e server >> routingtable


       Most likely there are some bugs in Anytun. If you find a bug, please
       let the developers know at Of course, patches are


       anytun(8), anytun-controld(8), anytun-showtables(8)


       Othmar Gsenger <> Erwin Nindl <>
       Christian Pointner <>


       Main web site:


       Copyright (C) 2007-2009 Othmar Gsenger, Erwin Nindl and Christian
       Pointner. This program is free software: you can redistribute it and/or
       modify it under the terms of the GNU General Public License as
       published by the Free Software Foundation, either version 3 of the
       License, or any later version.