Man page - nfnl_osf(8)

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Package: iptables
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Manual

NFNL_OSF

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
EXIT STATUS
FILES
SEE ALSO

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 .