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<H1>NFNL_OSF</H1>
Section: iptables 1.8.4 (8)<BR>Updated: <BR><A HREF="#index">Index</A>
<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
<P>
<A NAME="lbAB">&nbsp;</A>
<H2>NAME</H2>
nfnl_osf - OS fingerprint loader utility
<A NAME="lbAC">&nbsp;</A>
<H2>SYNOPSIS</H2>
<P>
<BR>
<B>nfnl_osf</B>
<B>-f</B><I> fingerprints</I>
[
<B>-d</B>
]
<P>
<A NAME="lbAD">&nbsp;</A>
<H2>DESCRIPTION</H2>
The
<B>nfnl_osf</B>
utility allows to load a set of operating system signatures into the kernel for
later matching against using iptables'
<B>osf</B>
match.
<P>
<A NAME="lbAE">&nbsp;</A>
<H2>OPTIONS</H2>
<P>
<DL COMPACT>
<DT id="1"><B>-f</B><I> fingerprints</I>
<DD>
Read signatures from file
<I>fingerprints</I>.
<P>
<DT id="2"><B>-d</B>
<DD>
Instead of adding the signatures from
<I>fingerprints</I>
into the kernel, remove them.
<P>
</DL>
<A NAME="lbAF">&nbsp;</A>
<H2>EXIT STATUS</H2>
Exit status is 0 if command succeeded, otherwise a negative return code
indicates the type of error which happened:
<P>
<DL COMPACT>
<DT id="3"><B>-1</B>
<DD>
Illegal arguments passed, fingerprints file not readable or failure in netlink
communication.
<P>
<DT id="4"><B>-ENOENT</B>
<DD>
Fingerprints file not specified.
<P>
<DT id="5"><B>-EINVAL</B>
<DD>
Netlink handle initialization failed or fingerprints file format invalid.
<P>
</DL>
<A NAME="lbAG">&nbsp;</A>
<H2>FILES</H2>
<P>
An up to date set of operating system signatures can be downloaded from
<A HREF="http://www.openbsd.org/cgi-bin/cvsweb/src/etc/pf.os">http://www.openbsd.org/cgi-bin/cvsweb/src/etc/pf.os</A> .
<P>
<A NAME="lbAH">&nbsp;</A>
<H2>SEE ALSO</H2>
<P>
The description of
<B>osf</B>
match in
<B><A HREF="/cgi-bin/man/man2html?8+iptables-extensions">iptables-extensions</A></B>(8)
contains further information about the topic as well as example
<B>nfnl_osf</B>
invocations.
<P>
<HR>
<A NAME="index">&nbsp;</A><H2>Index</H2>
<DL>
<DT id="6"><A HREF="#lbAB">NAME</A><DD>
<DT id="7"><A HREF="#lbAC">SYNOPSIS</A><DD>
<DT id="8"><A HREF="#lbAD">DESCRIPTION</A><DD>
<DT id="9"><A HREF="#lbAE">OPTIONS</A><DD>
<DT id="10"><A HREF="#lbAF">EXIT STATUS</A><DD>
<DT id="11"><A HREF="#lbAG">FILES</A><DD>
<DT id="12"><A HREF="#lbAH">SEE ALSO</A><DD>
</DL>
<HR>
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