mirror of
https://gitlab.com/shorewall/code.git
synced 2024-11-30 11:33:28 +01:00
351 lines
13 KiB
XML
351 lines
13 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
|
|
<refentry>
|
|
<refmeta>
|
|
<refentrytitle>shorewall-zones</refentrytitle>
|
|
|
|
<manvolnum>5</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>zones</refname>
|
|
|
|
<refpurpose>Shorewall zone declaration file</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<cmdsynopsis>
|
|
<command>/etc/shorewall/zones</command>
|
|
</cmdsynopsis>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para>The /etc/shorewall/zones file declares your network zones. You
|
|
specify the hosts in each zone through entries in
|
|
<filename>/etc/shorewall/interfaces</filename> or
|
|
<filename>/etc/shorewall/hosts</filename>.</para>
|
|
|
|
<para>The columns in the file are as follows.</para>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><emphasis role="bold">ZONE</emphasis> -
|
|
<emphasis>zone</emphasis>[<emphasis
|
|
role="bold">:</emphasis><emphasis>parent-zone</emphasis>[<emphasis
|
|
role="bold">,</emphasis><emphasis>parent-zone</emphasis>]...]</term>
|
|
|
|
<listitem>
|
|
<para>Name of the <emphasis>zone</emphasis>. Must start with a
|
|
letter and consist of letters, digits or '_'. The names "all",
|
|
"none", "any", "SOURCE" and "DEST" are reserved and may not be used
|
|
as zone names. The maximum length of a zone name is determined by
|
|
the setting of the LOGFORMAT option in <ulink
|
|
url="shorewall.conf.html">shorewall.conf</ulink>(5). With the
|
|
default LOGFORMAT, zone names can be at most 5 characters
|
|
long.</para>
|
|
|
|
<blockquote>
|
|
<para>The maximum length of an iptables log prefix is 29 bytes. As
|
|
explained in <ulink
|
|
url="shorewall.conf.html">shorewall.conf</ulink> (5), the default
|
|
LOGPREFIX formatting string is “Shorewall:%s:%s:” where the first
|
|
%s is replaced by the chain name and the second is replaced by the
|
|
disposition.</para>
|
|
|
|
<itemizedlist>
|
|
<listitem>
|
|
<para>The default formatting string has 12 fixed characters
|
|
("Shorewall" and three colons).</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>The longest of the standard dispositions are ACCEPT and
|
|
REJECT which have 6 characters each.</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>The canonical name for the chain containing the rules
|
|
for traffic going from zone 1 to zone 2 is "<zone
|
|
1>2<zone 2>" or "<zone 1>-<zone
|
|
2>".</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>So if M is the maximum zone name length, such chains can
|
|
have length 2*M + 1.</para>
|
|
|
|
<simplelist>
|
|
<member>12 + 6 + 2*M + 1 = 29 which reduces to</member>
|
|
|
|
<member>2*M = 29 - 12 - 6 - 1 = 10 or</member>
|
|
|
|
<member>M = 5</member>
|
|
</simplelist>
|
|
</listitem>
|
|
</itemizedlist>
|
|
</blockquote>
|
|
|
|
<para>The order in which Shorewall matches addresses from packets to
|
|
zones is determined by the order of zone declarations. Where a zone
|
|
is nested in one or more other zones, you may either ensure that the
|
|
nested zone precedes its parents in this file, or you may follow the
|
|
(sub)zone name by ":" and a comma-separated list of the parent
|
|
zones. The parent zones must have been declared in earlier records
|
|
in this file. See <ulink
|
|
url="shorewall-nesting.html">shorewall-nesting</ulink>(5) for
|
|
additional information.</para>
|
|
|
|
<para>Example:</para>
|
|
|
|
<programlisting>#ZONE TYPE OPTIONS IN OPTIONS OUT OPTIONS
|
|
a ipv4
|
|
b ipv4
|
|
c:a,b ipv4</programlisting>
|
|
|
|
<para>Currently, Shorewall uses this information to reorder the zone
|
|
list so that parent zones appear after their subzones in the list.
|
|
The IMPLICIT_CONTINUE option in <ulink
|
|
url="shorewall.conf.html">shorewall.conf</ulink>(5) can also create
|
|
implicit CONTINUE policies to/from the subzone.</para>
|
|
|
|
<para>Where an <emphasis role="bold">ipsec</emphasis> zone is
|
|
explicitly included as a child of an <emphasis
|
|
role="bold">ipv4</emphasis> zone, the ruleset allows CONTINUE
|
|
policies (explicit or implicit) to work as expected.</para>
|
|
|
|
<para>In the future, Shorewall may make additional use of nesting
|
|
information.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis role="bold">TYPE</emphasis></term>
|
|
|
|
<listitem>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><emphasis role="bold">ipv4</emphasis></term>
|
|
|
|
<listitem>
|
|
<para>This is the standard Shorewall zone type and is the
|
|
default if you leave this column empty or if you enter "-" in
|
|
the column. Communication with some zone hosts may be
|
|
encrypted. Encrypted hosts are designated using the
|
|
'ipsec'option in <ulink
|
|
url="shorewall-hosts.html">shorewall-hosts</ulink>(5).</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis role="bold">ipsec</emphasis> (or <emphasis
|
|
role="bold">ipsec4</emphasis>)</term>
|
|
|
|
<listitem>
|
|
<para>Communication with all zone hosts is encrypted. Your
|
|
kernel and iptables must include policy match support.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis role="bold">firewall</emphasis></term>
|
|
|
|
<listitem>
|
|
<para>Designates the firewall itself. You must have exactly
|
|
one 'firewall' zone. No options are permitted with a
|
|
'firewall' zone. The name that you enter in the ZONE column
|
|
will be stored in the shell variable $FW which you may use in
|
|
other configuration files to designate the firewall
|
|
zone.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis role="bold">bport</emphasis> (or <emphasis
|
|
role="bold">bport4</emphasis>)</term>
|
|
|
|
<listitem>
|
|
<para>The zone is associated with one or more ports on a
|
|
single bridge.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis role="bold">vserver</emphasis></term>
|
|
|
|
<listitem>
|
|
<para>Added in Shorewall 4.4.11 Beta 2 - A zone composed of
|
|
Linux-vserver guests. The zone contents must be defined in
|
|
<ulink url="shorewall-hosts.html">shorewall-hosts</ulink>
|
|
(5).</para>
|
|
|
|
<para>Vserver zones are implicitly handled as subzones of the
|
|
firewall zone.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis role="bold">OPTIONS, IN OPTIONS and OUT
|
|
OPTIONS</emphasis> - [<emphasis>option</emphasis>[<emphasis
|
|
role="bold">,</emphasis><emphasis>option</emphasis>]...]</term>
|
|
|
|
<listitem>
|
|
<para>A comma-separated list of options. With the exception of the
|
|
<option>mss</option> and <option>blacklist</option> options, these
|
|
only apply to TYPE <option>ipsec</option> zones.</para>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><emphasis role="bold">blacklist</emphasis></term>
|
|
|
|
<listitem>
|
|
<para>Added in Shorewall 4.4.13. May not be specified for
|
|
<emphasis role="bold">firewall</emphasis> or <emphasis
|
|
role="bold">vserver</emphasis> zones.</para>
|
|
|
|
<para>When specified in the IN_OPTIONS column, causes all
|
|
traffic from this zone to be passed against the <emphasis
|
|
role="bold">src</emphasis> entries in s<ulink
|
|
url="shorewall-blacklist.html">horewall-blacklist</ulink>(5).</para>
|
|
|
|
<para>When specified in the OUT_OPTIONS column, causes all
|
|
traffic to this zone to be passed against the <emphasis
|
|
role="bold">dst</emphasis> entries in s<ulink
|
|
url="shorewall-blacklist.html">horewall-blacklist</ulink>(5).</para>
|
|
|
|
<para>Specifying this option in the OPTIONS column is
|
|
equivalent to entering it in both of the IN_OPTIONS and
|
|
OUT_OPTIONS column.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis
|
|
role="bold">reqid=</emphasis><emphasis>number</emphasis></term>
|
|
|
|
<listitem>
|
|
<para>where <emphasis>number</emphasis> is specified using
|
|
setkey(8) using the 'unique:<emphasis>number</emphasis> option
|
|
for the SPD level.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis role="bold">spi=</emphasis><number></term>
|
|
|
|
<listitem>
|
|
<para>where <emphasis>number</emphasis> is the SPI of the SA
|
|
used to encrypt/decrypt packets.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis role="bold">proto=</emphasis><emphasis
|
|
role="bold">ah</emphasis>|<emphasis
|
|
role="bold">esp</emphasis>|<emphasis
|
|
role="bold">ipcomp</emphasis></term>
|
|
|
|
<listitem>
|
|
<para>IPSEC Encapsulation Protocol</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis
|
|
role="bold">mss=</emphasis><emphasis>number</emphasis></term>
|
|
|
|
<listitem>
|
|
<para>sets the MSS field in TCP packets. If you supply this
|
|
option, you should also set FASTACCEPT=No in <ulink
|
|
url="shorewall.conf.html">shorewall.conf</ulink>(5) to insure
|
|
that both the SYN and SYN,ACK packets have their MSS field
|
|
adjusted.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis role="bold">mode=</emphasis><emphasis
|
|
role="bold">transport</emphasis>|<emphasis
|
|
role="bold">tunnel</emphasis></term>
|
|
|
|
<listitem>
|
|
<para>IPSEC mode</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis
|
|
role="bold">tunnel-src=</emphasis><emphasis>address</emphasis>[/<emphasis>mask</emphasis>]</term>
|
|
|
|
<listitem>
|
|
<para>only available with mode=tunnel</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis
|
|
role="bold">tunnel-dst=</emphasis><emphasis>address</emphasis>[/<emphasis>mask</emphasis>]</term>
|
|
|
|
<listitem>
|
|
<para>only available with mode=tunnel</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis role="bold">strict</emphasis></term>
|
|
|
|
<listitem>
|
|
<para>Means that packets must match all rules.</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><emphasis role="bold">next</emphasis></term>
|
|
|
|
<listitem>
|
|
<para>Separates rules; can only be used with strict</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
|
|
<para>The options in the OPTIONS column are applied to both incoming
|
|
and outgoing traffic. The IN OPTIONS are applied to incoming traffic
|
|
(in addition to OPTIONS) and the OUT OPTIONS are applied to outgoing
|
|
traffic.</para>
|
|
|
|
<para>If you wish to leave a column empty but need to make an entry
|
|
in a following column, use "-".</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>FILES</title>
|
|
|
|
<para>/etc/shorewall/zones</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See ALSO</title>
|
|
|
|
<para><ulink
|
|
url="http://www.shorewall.net/Multiple_Zones.html">http://www.shorewall.net/Multiple_Zones.html</ulink>.</para>
|
|
|
|
<para>shorewall(8), shorewall-accounting(5), shorewall-actions(5),
|
|
shorewall-blacklist(5), shorewall-hosts(5), shorewall_interfaces(5),
|
|
shorewall-ipsets(5), shorewall-maclist(5), shorewall-masq(5),
|
|
shorewall-nat(5), shorewall-nesting(8), shorewall-netmap(5),
|
|
shorewall-params(5), shorewall-policy(5), shorewall-providers(5),
|
|
shorewall-proxyarp(5), shorewall-route_rules(5),
|
|
shorewall-routestopped(5), shorewall-rules(5), shorewall.conf(5),
|
|
shorewall-secmarks(5), shorewall-tcclasses(5), shorewall-tcdevices(5),
|
|
shorewall-tcrules(5), shorewall-tos(5), shorewall-tunnels(5)</para>
|
|
</refsect1>
|
|
</refentry>
|