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206 lines
8.1 KiB
XML
206 lines
8.1 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
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"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
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<refentry>
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<refmeta>
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<refentrytitle>shorewall6-blacklist</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>blacklist</refname>
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<refpurpose>shorewall6 Blacklist file</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>/etc/shorewall6/blacklist</command>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>The blacklist file is used to perform static blacklisting. You can
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blacklist by source address (IP or MAC), or by application.</para>
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<para>The columns in the file are as follows.</para>
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<variablelist>
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<varlistentry>
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<term><emphasis role="bold">ADDRESS/SUBNET</emphasis> - {<emphasis
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role="bold">-</emphasis>|<emphasis
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role="bold">~</emphasis><emphasis>mac-address</emphasis>|<emphasis>ip-address</emphasis>|<emphasis>address-range</emphasis>|<emphasis
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role="bold">+</emphasis><emphasis>ipset</emphasis>}</term>
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<listitem>
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<para>Host address, network address, MAC address, IP address range
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(if your kernel and ip6tables contain iprange match support) or
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ipset name prefaced by "+" (if your kernel supports ipset match).
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Exclusion (<ulink
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url="shorewall6-exclusion.html">shorewall6-exclusion</ulink>(5)) is
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supported.</para>
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<para>MAC addresses must be prefixed with "~" and use "-" as a
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separator.</para>
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<para>Example: ~00-A0-C9-15-39-78</para>
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<para>A dash ("-") in this column means that any source address will
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match. This is useful if you want to blacklist a particular
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application using entries in the PROTOCOL and PORTS columns.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">PROTOCOL</emphasis> (Optional) -
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{<emphasis
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role="bold">-</emphasis>|<emphasis>protocol-number</emphasis>|<emphasis>protocol-name</emphasis>}</term>
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<listitem>
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<para>If specified, must be a protocol number or a protocol name
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from protocols(5).</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">PORTS</emphasis> (Optional) - {<emphasis
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role="bold">-</emphasis>|<emphasis>port-name-or-number</emphasis>[,<emphasis>port-name-or-number</emphasis>]...}</term>
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<listitem>
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<para>May only be specified if the protocol is TCP (6), UDP (17),
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DCCP (33), SCTP (132) or UDPLITE (136). A comma-separated list of
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destination port numbers or service names from services(5).</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>OPTIONS (Optional - Added in 4.4.12) -
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{-|{dst|src|whitelist|audit}[,...]}</term>
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<listitem>
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<para>If specified, indicates whether traffic
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<emphasis>from</emphasis> ADDRESS/SUBNET (<emphasis
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role="bold">src</emphasis>) or traffic <emphasis>to</emphasis>
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ADDRESS/SUBNET (<emphasis role="bold">dst</emphasis>) should be
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blacklisted. The default is <emphasis role="bold">src</emphasis>. If
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the ADDRESS/SUBNET column is empty, then this column has no effect
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on the generated rule.</para>
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<note>
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<para>In Shorewall 4.4.12, the keywords from and to were used in
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place of src and dst respectively. Blacklisting was still
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restricted to traffic <emphasis>arriving</emphasis> on an
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interface that has the 'blacklist' option set. So to block traffic
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from your local network to an internet host, you had to specify
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<option>blacklist</option> on your internal interface in <ulink
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url="shorewall6-interfaces.html">shorewall6-interfaces</ulink>
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(5).</para>
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</note>
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<note>
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<para>Beginning with Shorewall 4.4.13, entries are applied based
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on the <emphasis role="bold">blacklist</emphasis> setting in
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<ulink
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url="shorewall-zones.html">shorewall6-zones</ulink>(5):</para>
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<orderedlist>
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<listitem>
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<para>'blacklist' in the OPTIONS or IN_OPTIONS column. Traffic
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from this zone is passed against the entries in this file that
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have the <emphasis role="bold">src</emphasis> option
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(specified or defaulted).</para>
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</listitem>
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<listitem>
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<para>'blacklist' in the OPTIONS or OUT_OPTIONS column.
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Traffic to this zone is passed against the entries in this
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file that have the <emphasis role="bold">dst</emphasis>
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option.</para>
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</listitem>
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</orderedlist>
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</note>
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<para>In Shorewall 4.4.20, the <emphasis
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role="bold">whitelist</emphasis> option was added. When <emphasis
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role="bold">whitelist</emphasis> is specified, packets/connections
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that match the entry are not matched against the remaining entries
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in the file.</para>
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<para>The <emphasis role="bold">audit</emphasis> option was also
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added in 4.4.20 and causes packets matching the entry to be audited.
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The <emphasis role="bold">audit</emphasis> option may not be
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specified in whitelist entries and require AUDIT_TARGET support in
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the kernel and ip6tables.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>When a packet arrives on an interface that has the <emphasis
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role="bold">blacklist</emphasis> option specified in <ulink
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url="shorewall-interfaces.html">shorewall6-interfaces</ulink>(5), its
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source IP address and MAC address is checked against this file and
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disposed of according to the <emphasis
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role="bold">BLACKLIST_DISPOSITION</emphasis> and <emphasis
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role="bold">BLACKLIST_LOGLEVEL</emphasis> variables in <ulink
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url="shorewall.conf.html">shorewall6.conf</ulink>(5). If <emphasis
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role="bold">PROTOCOL</emphasis> or <emphasis
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role="bold">PROTOCOL</emphasis> and <emphasis role="bold">PORTS</emphasis>
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are supplied, only packets matching the protocol (and one of the ports if
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<emphasis role="bold">PORTS</emphasis> supplied) are blocked.</para>
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</refsect1>
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<refsect1>
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<title>Example</title>
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<variablelist>
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<varlistentry>
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<term>Example 1:</term>
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<listitem>
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<para>To block DNS queries from address
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fe80::2a0:ccff:fedb:31c4:</para>
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<programlisting> #ADDRESS/SUBNET PROTOCOL PORT
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fe80::2a0:ccff:fedb:31c4/ udp 53</programlisting>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>Example 2:</term>
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<listitem>
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<para>To block some of the nuisance applications:</para>
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<programlisting> #ADDRESS/SUBNET PROTOCOL PORT
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- udp 1024:1033,1434
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- tcp 57,1433,1434,2401,2745,3127,3306,3410,4899,5554,6101,8081,9898</programlisting>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>FILES</title>
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<para>/etc/shorewall6/blacklist</para>
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</refsect1>
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<refsect1>
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<title>See ALSO</title>
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<para><ulink
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url="http://shorewall.net/blacklisting_support.htm">http://shorewall.net/blacklisting_support.htm</ulink></para>
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<para>shorewall6(8), shorewall6-accounting(5), shorewall6-actions(5),
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shorewall6-hosts(5), shorewall6-interfaces(5), shorewall6-maclist(5),
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shorewall6-params(5), shorewall6-policy(5), shorewall6-providers(5),
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shorewall6-route_rules(5), shorewall6-routestopped(5),
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shorewall6-rules(5), shorewall6.conf(5), shorewall6-secmarks(5),
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shorewall6-tcclasses(5), shorewall6-tcdevices(5), shorewall6-tcrules(5),
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shorewall6-tos(5), shorewall6-tunnels(5), shorewall6-zones(5)</para>
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</refsect1>
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</refentry>
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