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 signa-
tures 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 ker-
nel, 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 fail-
ure 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 example nfnl_osf invocations.
iptables 1.8.11 NFNL_OSF(8)
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