sniffit(5)

NAME

   sniffit - configuration file for sniffit (name arbitrary)

DESCRIPTION

   This  page  describes  the  format for the config file for sniffit (see
   sniffit(8) ). This file allows you to specify  in  great  detail  witch
   packets  should  be  processed by sniffit.  This file also controls (or
   will control) some functions for the continuous logging ('-L' option).

   A sniffit config file might look like (Be sure to end it with  a  BLANK
   line):

          # Sniffit Sample Config file -- Brecht Claerhout

          logfile /var/log/sniffit.today.log

          # First select all packets!
          select both mhosts 1
          select both mhosts 2

          # Now deselect all packets from/to those damn 'surfers'
          deselect both port 80
          deselect both port 8001

   This file will tell sniffit to process all packets on the subnet except
   those FROM/TO ports 80 and 8001 (thus we don't want logs of those  mass
   WWW connections witch turn our logs unreadable).

GLOBAL FORMAT

   The  file  consists  of  lines,  lines are formed by fields, fields are
   separated with SPACES (NO TABS).  Unix comment lines (starting with '#'
   are allowed).  So this gives us:

          <field1> <field2> <field3> <field4> <field5>

FIELD FORMAT

   <field1>
          select  - Sniffit will look for packets that match the following
          description (other fields)

          deselect  -  Sniffit  will  ignore  packets   that   match   the
          description

          logfile  -  change  the  logfile name to <field2> instead of the
          default 'sniffit.log'

   <field2>
          from - Packets FROM the host matching the  following  desc.  are
          considered.

          to - similar, Packets TO the....

          both - similar, Packets FROM or TO the....

          a filename - as an argument of 'logfile' in <field1>

   <field3>
          host - The (de)selection criteria involves a hostname.

          port - similar, ... a portnumber

          mhosts  -  The  (de)selection  criteria involves multiple-hosts,
          like with the wildcards in 0.3.0, but without the 'x'

   <field4>
          Either a hostname, a portnumber, a service name or a  number-dot
          partial notation indicating multiple hosts depending on <field3>
          (service names like 'ftp' are resolved as the services available
          present  on  the  host  that runs Sniffit, and translated into a
          port nr)

   <field5>
          A portnumber, if <field3> was 'host' or 'mhosts'  (optional,  if
          not filled in, all ports are going to be (de)selected)

FILE INTERPRETING

   The config file is interpreted SEQUENTIAL, so watch it, don't mix lines
   in a file. Example:

                select both mhosts 100.100.12.
                deselect both port 80
                select both host 100.100.12.2

          This file will get you the packets:
                a) Send by hosts '100.100.12.*'
                b) EXCEPT the WWW packets
                c) BUT showing the WWW packets concerning
                   100.100.12.2

                select both mhosts 100.100.12.
                select both host 100.100.12.2
                deselect both port 80

          Will give you the packets (probably unwanted result):
                a) Send by hosts '100.100.12.*'
                b) Send from/to 100.100.12.2 (useless line)
                c) deselecting all WWW packets on the subnet

AUTHOR

   Brecht Claerhout <[email protected]>

SEE ALSO

   sniffit(8)

                                                                SNIFFIT(5)

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