shorewall_code/manpages/shorewall-blacklist.xml
2008-07-04 14:16:40 +00:00

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<?xml version="1.0" encoding="UTF-8"?>
<refentry>
<refmeta>
<refentrytitle>shorewall-blacklist</refentrytitle>
<manvolnum>5</manvolnum>
</refmeta>
<refnamediv>
<refname>blacklist</refname>
<refpurpose>Shorewall Blacklist file</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>/etc/shorewall/blacklist</command>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>The blacklist file is used to perform static blacklisting. You can
blacklist by source address (IP or MAC), or by application.</para>
<para>The columns in the file are as follows.</para>
<variablelist>
<varlistentry>
<term><emphasis role="bold">ADDRESS/SUBNET</emphasis> — {<emphasis
role="bold">-</emphasis>|<emphasis
role="bold">~</emphasis><emphasis>mac-address</emphasis>|<emphasis>ip-address</emphasis>|<emphasis>address-range</emphasis>|<emphasis
role="bold">+</emphasis><emphasis>ipset</emphasis>}</term>
<listitem>
<para>Host address, network address, MAC address, IP address range
(if your kernel and iptables contain iprange match support) or ipset
name prefaced by "+" (if your kernel supports ipset match).</para>
<para>MAC addresses must be prefixed with "~" and use "-" as a
separator.</para>
<para>Example: ~00-A0-C9-15-39-78</para>
<para>A dash ("-") in this column means that any source address will
match. This is useful if you want to blacklist a particular
application using entries in the PROTOCOL and PORTS columns.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">PROTOCOL</emphasis> (Optional) —
{<emphasis
role="bold">-</emphasis>|<emphasis>protocol-number</emphasis>|<emphasis>protocol-name</emphasis>}</term>
<listitem>
<para>If specified, must be a protocol number or a protocol name
from protocols(5).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">PORTS</emphasis> (Optional) — {<emphasis
role="bold">-</emphasis>|<emphasis>port-name-or-number</emphasis>[,<emphasis>port-name-or-number</emphasis>]...}</term>
<listitem>
<para>May only be specified if the protocol is TCP (6) or UDP (17).
A comma-separated list of destination port numbers or service names
from services(5).</para>
</listitem>
</varlistentry>
</variablelist>
<para>When a packet arrives on an interface that has the <emphasis
role="bold">blacklist</emphasis> option specified in <ulink
url="shorewall-interfaces.html">shorewall-interfaces</ulink>(5), its
source IP address and MAC address is checked against this file and
disposed of according to the <emphasis
role="bold">BLACKLIST_DISPOSITION</emphasis> and <emphasis
role="bold">BLACKLIST_LOGLEVEL</emphasis> variables in <ulink
url="shorewall.conf.html">shorewall.conf</ulink>(5). If <emphasis
role="bold">PROTOCOL</emphasis> or <emphasis
role="bold">PROTOCOL</emphasis> and <emphasis role="bold">PORTS</emphasis>
are supplied, only packets matching the protocol (and one of the ports if
<emphasis role="bold">PORTS</emphasis> supplied) are blocked.</para>
</refsect1>
<refsect1>
<title>Example</title>
<variablelist>
<varlistentry>
<term>Example 1:</term>
<listitem>
<para>To block DNS queries from address 192.0.2.126:</para>
<programlisting> #ADDRESS/SUBNET PROTOCOL PORT
192.0.2.126 udp 53</programlisting>
</listitem>
</varlistentry>
<varlistentry>
<term>Example 2:</term>
<listitem>
<para>To block some of the nuisance applications:</para>
<programlisting> #ADDRESS/SUBNET PROTOCOL PORT
- udp 1024:1033,1434
- tcp 57,1433,1434,2401,2745,3127,3306,3410,4899,5554,6101,8081,9898</programlisting>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>FILES</title>
<para>/etc/shorewall/blacklist</para>
</refsect1>
<refsect1>
<title>See ALSO</title>
<para><ulink
url="http://shorewall.net/blacklisting_support.htm">http://shorewall.net/blacklisting_support.htm</ulink></para>
<para>shorewall(8), shorewall-accounting(5), shorewall-actions(5),
shorewall-hosts(5), shorewall-interfaces(5), shorewall-ipsec(5),
shorewall-maclist(5), shorewall-masq(5), shorewall-nat(5),
shorewall-netmap(5), shorewall-params(5), shorewall-policy(5),
shorewall-providers(5), shorewall-proxyarp(5), shorewall-route_routes(5),
shorewall-routestopped(5), shorewall-rules(5), shorewall.conf(5),
shorewall-tcclasses(5), shorewall-tcdevices(5), shorewall-tcrules(5),
shorewall-tos(5), shorewall-tunnels(5), shorewall-zones(5)</para>
</refsect1>
</refentry>