CONFIG_IP_NF_MATCH_TOS
OSF match support
CONFIG_IP_NF_MATCH_OSF

  The idea of passive OS fingerprint matching exists for quite a long time,
  but was created as extension fo OpenBSD pf only some weeks ago.
  Original idea was lurked in some OpenBSD mailing list (thanks
  grange@open...) and than adopted for Linux netfilter in form of this code.

  Original table was created by Michal Zalewski <lcamtuf@coredump.cx> for
  his excellent p0f and than changed a bit for more convenience.

  This module compares some data(WS, MSS, options and it's order, ttl,
  df and others) from first SYN packet (actually from packets with SYN
  bit set) with hardcoded in fingers[] table ones.

  If you say Y here, try iptables -m osf --help for more information.
 
  If you want to compile it as a module, say M here and read
  Documentation/modules.txt.  If unsure, say `N'.
