NAME

       guessnet-scan - guess network configuration data by looking at network traffic

SYNOPSIS

       guessnet-scan [options] [ethernet_interface]

DESCRIPTION

       Guessnet-scan  tries to deduce network configuration data by watching network traffic at a given Ethernet
       interface.

       After scanning network traffic for some time, guessnet-scan prints a configuration  string  suitable  for
       inclusion in /etc/network/interfaces.

       Note that guessnet-scan uses heuristics and wild guesses and that the resulting data is not guaranteed to
       be accurate.  The program is intended to be used as a first try at  getting  network  configuration  data
       without bothering anyone.

OPTIONS

       Options follow the usual GNU conventions,

       --debug
              Print debugging messages.

       --help Show a brief summary of commandline options.

       --init-time=int
              Time in seconds to wait for the interface to initialize when it is not found already up at program
              startup.  Default: 3 seconds.

       -t, --timeout=int
              Time in seconds to watch for network traffic.  Default: 5 seconds.

       -v, --verbose
              Operate verbosely.

       --version
              Show the version number of the program.

SCANNING REQUIREMENTS

       To correctly identify all data of the local network, guessnet-scan needs to see traffic related to a host
       in the local network and to the local gateway, if any.

       To  be able to identify the network gateway, guessnet-scan also needs to see some traffic directed to the
       external network: you can help the detection by generating some outbound IP traffic during the scan,  for
       example by browsing a web page (without proxy) or using telnet to open a connection to some remote host.

       Note  that  if  you  are  connected  to a switch, guessnet-scan won't probably be able to work, since the
       switch will isolate it from the network traffic that the other machines are generating.

SEE ALSO

       guessnet(8), interfaces(5).

AUTHOR

       Guessnet-scan was written by Enrico Zini <enrico@debian.org>.

                                                 10 October 2004                                GUESSNET-SCAN(8)