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Add connection-limiting per-IP example

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git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@3040 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
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teastep 2005-11-20 21:23:05 +00:00
parent a70b5432ff
commit 16d7c6da44
2 changed files with 42 additions and 2 deletions
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3
Shorewall-docs2/Documentation_Index.xml
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@ -476,7 +476,8 @@
</listitem> </listitem>
<listitem> <listitem>
<para><ulink url="PortKnocking.html">Port Knocking</ulink></para> <para><ulink url="PortKnocking.html">Port Knocking and Other Uses of the
'Recent Match'</ulink></para>
</listitem> </listitem>
<listitem> <listitem>

41
Shorewall-docs2/PortKnocking.xml
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@ -5,7 +5,7 @@
<!--$Id$--> <!--$Id$-->
<articleinfo> <articleinfo>
<title>Port Knocking</title> <title>Port Knocking and Other Uses of 'Recent Match' </title>
<authorgroup> <authorgroup>
<author> <author>
@ -127,4 +127,43 @@ SSHKnock net loc:192.168.1.5 tcp 22 -
</listitem> </listitem>
</orderedlist> </orderedlist>
</section> </section>
<section>
<title>Limiting Per-IP Connection Rate</title>
<para>Suppose that you wish to limit the number of connections to port 22
to 3/minute from internet host.</para>
<orderedlist>
<listitem>
<para>Add an action named SSHLimit (see the <ulink
url="Actions.html">Action documentation</ulink>). Leave the
<filename>action.SSHLimit</filename> file empty.</para>
</listitem>
<listitem>
<para>Create /etc/shorewall/SSLimit with the following
contents:</para>
<programlisting>run_iptables -A $CHAIN -m recent --name SSHA --set
if [ -n "$LEVEL" ]; then
log_rule_limit $LEVEL $CHAIN SSHLimit REJECT "" "$TAG" -A -m recent --name SSHA --seconds 60 --hitcount 3
fi
run_iptables -A $CHAIN -m recent --name SSHA --seconds 60 --hitcount 3 -j reject</programlisting>
</listitem>
<listitem>
<para>Add this rule to /etc/shorewall/rules:</para>
<programlisting>#ACTION SOURCE DEST PROTO DEST PORT(S)
SSHLimit net all tcp 22</programlisting>
<para>If you wish to log the rejects at the 'info' level then use this
rule instead:</para>
<programlisting>#ACTION SOURCE DEST PROTO DEST PORT(S)
SSHLimit:info net all tcp 22</programlisting>
</listitem>
</orderedlist>
</section>
</article> </article>