Manual: nfnl_osf

NFNL_OSF(8)					       iptables 1.8.11						 NFNL_OSF(8)

NAME
       nfnl_osf — OS fingerprint loader utility

SYNOPSIS
       nfnl_osf -f fingerprints [ -d ]

DESCRIPTION
       The nfnl_osf utility allows one to load a set of operating system signatures into the kernel for later matching
       against using iptables' osf match.

OPTIONS
       -f fingerprints
	      Read signatures from file fingerprints.

       -d     Instead of adding the signatures from fingerprints into the kernel, remove them.

EXIT STATUS
       Exit status is 0 if command succeeded, otherwise a negative return code indicates the type of error which happened:

       -1     Illegal arguments passed, fingerprints file not readable or failure in netlink communication.

       -ENOENT
	      Fingerprints file not specified.

       -EINVAL
	      Netlink handle initialization failed or fingerprints file format invalid.

FILES
       An   up	 to   date   set   of  operating  system  signatures  can  be  downloaded  from	 http://www.openbsd.org/cgi-
       bin/cvsweb/src/etc/pf.os .

SEE ALSO
       The description of osf match in iptables-extensions(8) contains further information about the topic as well as  exam‐
       ple nfnl_osf invocations.

iptables 1.8.11													 NFNL_OSF(8)