shorewall_code/STABLE/documentation/shorewall_prerequisites.htm
teastep dbfc838988 Shorewall 1.4.8
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<title>Shorewall Prerequisites</title>
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<h1 style="text-align: center;">Shorewall Requirements</h1>
Shorewall Requires:<br>
<ul>
<li>A kernel that supports netfilter. I've tested with 2.4.2 -
2.4.20. With current releases of Shorewall, Traffic Shaping/Control
requires at least 2.4.18.&nbsp; <a href="kernel.htm"> Check here for
kernel configuration information.</a> If you are looking for a firewall
for use with 2.2 kernels, <a href="http://seawall.sf.net"> see the
Seattle
Firewall site</a> .</li>
<li>iptables 1.2 or later but beware version 1.2.3 -- see the <a
href="errata.htm">Errata</a>. <font color="#ff0000"><b>WARNING: </b></font>The
buggy iptables version 1.2.3 is included in RedHat 7.2 and you should
upgrade to iptables 1.2.4 prior to installing Shorewall. Version 1.2.4
is available <a
href="http://www.redhat.com/support/errata/RHSA-2001-144.html">from
RedHat</a> and in the <a href="errata.htm">Shorewall Errata</a>. </li>
<li>Iproute ("ip" utility). The iproute package is included with most
distributions but may not be installed by default. The official
download site is <a href="ftp://ftp.inr.ac.ru/ip-routing"
target="_blank"> <font face="Century Gothic, Arial, Helvetica">f</font>tp://ftp.inr.ac.ru/ip-routing</a>.
</li>
<li>A Bourne shell or derivative such as bash or ash. This shell must
have correct support for variable expansion formats ${<i>variable</i>%<i>pattern</i>
}, ${<i>variable</i>%%<i>pattern</i>}, ${<i>variable</i>#<i>pattern</i>
} and ${<i>variable</i>##<i>pattern</i>}.</li>
<li>Your shell must produce a sensible result when a number n (128
&lt;= n &lt;= 255) is left shifted by 24 bits. You can check this at a
shell prompt by:</li>
<ul>
<li>echo $((128 &lt;&lt; 24))<br>
</li>
<li>The result must be either 2147483648 or -2147483648.<br>
</li>
</ul>
<li>The firewall monitoring display is greatly improved if you have
awk (gawk) installed.</li>
</ul>
<p align="left"><font size="2">Last updated 7/8/2003 - <a
href="support.htm">Tom Eastep</a></font></p>
<p align="left"><font face="Trebuchet MS"><a href="copyright.htm"> <font
size="2">Copyright</font> <20> <font size="2">2001, 2002, 2003 Thomas M.
Eastep.</font></a></font></p>
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