1NFNL_OSF(8)                     iptables 1.8.7                     NFNL_OSF(8)
2
3
4

NAME

6       nfnl_osf - OS fingerprint loader utility
7

SYNOPSIS

9       nfnl_osf -f fingerprints [ -d ]
10
11

DESCRIPTION

13       The nfnl_osf utility allows to load a set of operating system signa‐
14       tures into the kernel for later matching against using iptables' osf
15       match.
16
17

OPTIONS

19       -f fingerprints
20              Read signatures from file fingerprints.
21
22
23       -d     Instead of adding the signatures from fingerprints into the ker‐
24              nel, remove them.
25
26

EXIT STATUS

28       Exit status is 0 if command succeeded, otherwise a negative return code
29       indicates the type of error which happened:
30
31
32       -1     Illegal arguments passed, fingerprints file not readable or
33              failure in netlink communication.
34
35
36       -ENOENT
37              Fingerprints file not specified.
38
39
40       -EINVAL
41              Netlink handle initialization failed or fingerprints file format
42              invalid.
43
44

FILES

46       An up to date set of operating system signatures can be downloaded from
47       http://www.openbsd.org/cgi-bin/cvsweb/src/etc/pf.os .
48
49

SEE ALSO

51       The description of osf match in iptables-extensions(8) contains further
52       information about the topic as well as example nfnl_osf invocations.
53
54
55
56iptables 1.8.7                                                     NFNL_OSF(8)