mirror of
https://gitlab.com/shorewall/code.git
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44e0d48fc5
Signed-off-by: Tom Eastep <teastep@shorewall.net>
428 lines
16 KiB
XML
428 lines
16 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-secmarks</refentrytitle>
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<manvolnum>5</manvolnum>
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<refmiscinfo>Configuration Files</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>secmarks</refname>
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<refpurpose>Shorewall6 file</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>/etc/shorewall6/secmarks</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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<important>
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<para>Unlike rules in the <ulink
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url="/manpages6/shorewall6-rules.html">shorewall6-rules</ulink>(5) file,
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evaluation of rules in this file will continue after a match. So the
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final secmark for each packet will be the one assigned by the LAST rule
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that matches.</para>
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</important>
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<para>The secmarks file is used to associate an SELinux context with
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packets. It was added in Shorewall6 version 4.4.13.</para>
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<para>The columns in the file are as follows (where the column name is
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followed by a different name in parentheses, the different name is used in
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the alternate specification syntax).</para>
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<variablelist>
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<varlistentry>
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<term><emphasis role="bold">SECMARK -
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{SAVE|RESTORE|<replaceable>context</replaceable>|[?]COMMENT
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<replaceable>comment</replaceable>}</emphasis></term>
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<listitem>
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<variablelist>
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<varlistentry>
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<term><emphasis role="bold">SAVE</emphasis></term>
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<listitem>
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<para>If an SELinux context is associated with the packet, the
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context is saved in the connection. Normally, the remaining
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columns should be left blank.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">RESTORE</emphasis></term>
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<listitem>
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<para>If an SELinux context is not currently associated with
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the packet, then the saved context (if any) is associated with
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the packet. Normally, the remaining columns should be left
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blank.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable role="bold">context</replaceable></term>
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<listitem>
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<para>An SELinux context.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>[?]COMMENT</term>
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<listitem>
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<para>The remainder of the line is treated as a comment which
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is attached to subsequent rules until another COMMENT line is
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found or until the end of the file is reached. To stop adding
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comments to rules, use a line with only the word
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COMMENT.</para>
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<note>
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<para>Beginning with Shorewall 4.5.11, ?COMMENT is a synonym
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for COMMENT and is preferred.</para>
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</note>
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</listitem>
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</varlistentry>
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</variablelist>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">CHAIN:STATE (chain) -
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{P|I|F|O|T}[:{N|I|U|IU|NI|NU|NIU|NUI:E|ER}]</emphasis></term>
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<listitem>
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<para>This column determines the CHAIN where the SELinux context is
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to be applied:</para>
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<simplelist>
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<member>P - PREROUTING</member>
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<member>I - INPUT</member>
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<member>F - FORWARD</member>
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<member>O - OUTPUT</member>
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<member>T - POSTROUTING</member>
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</simplelist>
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<para>It may be optionally followed by a colon and an indication of
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the Netfilter connection state(s) at which the context is to be
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applied:</para>
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<simplelist>
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<member>:N - NEW connection</member>
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<member>:I - INVALID connection</member>
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<member>:NI - NEW or INVALID connection</member>
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<member>:E - ESTABLISHED connection</member>
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<member>:ER - ESTABLISHED or RELATED connection</member>
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</simplelist>
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<para>Beginning with Shorewall 4.5.10, the following additional
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options are available</para>
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<simplelist>
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<member>:U - UNTRACKED connection</member>
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<member>:IU - INVALID or UNTRACKED connection</member>
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<member>:NU - NEW or UNTRACKED connection</member>
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<member>:NIU - NEW, INVALID or UNTRACKED connection.</member>
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</simplelist>
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</listitem>
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</varlistentry>
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</variablelist>
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<variablelist>
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<varlistentry>
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<term><emphasis role="bold">SOURCE</emphasis> - {<emphasis
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role="bold">-</emphasis><emphasis>interface</emphasis>|[<emphasis>interface</emphasis>:]<emphasis>address-or-range</emphasis>[<emphasis
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role="bold">,</emphasis><emphasis>address-or-range</emphasis>]...}[<emphasis>exclusion</emphasis>]</term>
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<listitem>
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<para>May be:</para>
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<orderedlist>
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<listitem>
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<para>An interface name - matches traffic entering the firewall
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on the specified interface. May not be used in classify rules or
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in rules using the T in the CHAIN column.</para>
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</listitem>
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<listitem>
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<para>A comma-separated list of host or network IP addresses or
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MAC addresses.</para>
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</listitem>
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<listitem>
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<para>An interface name followed by a colon (":") followed by a
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comma-separated list of host or network IP addresses or MAC
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addresses.</para>
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</listitem>
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</orderedlist>
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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>You may exclude certain hosts from the set already defined
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through use of an <emphasis>exclusion</emphasis> (see <ulink
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url="/manpages6/shorewall6-exclusion.html">shorewall6-exclusion</ulink>(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">DEST</emphasis> - {<emphasis
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role="bold">-</emphasis>|{<emphasis>interface</emphasis>|[<emphasis>interface</emphasis>:]<emphasis>address-or-range</emphasis>[<emphasis
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role="bold">,</emphasis><emphasis>address-or-range</emphasis>]...}[<emphasis>exclusion</emphasis>]</term>
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<listitem>
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<para>May be:</para>
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<orderedlist>
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<listitem>
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<para>An interface name. May not be used in the PREROUTING or
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INPUT chains. The interface name may be optionally followed by a
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colon (":") and an IP address list.</para>
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</listitem>
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<listitem>
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<para>A comma-separated list of host or network IP addresses.
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The list may include ip address ranges if your kernel and
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iptables include iprange support.</para>
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</listitem>
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</orderedlist>
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<para>You may exclude certain hosts from the set already defined
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through use of an <emphasis>exclusion</emphasis> (see <ulink
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url="/manpages6/shorewall6-exclusion.html">shorewall6-exclusion</ulink>(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">PROTO</emphasis> - {<emphasis
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role="bold">-</emphasis>|<emphasis
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role="bold">tcp:syn</emphasis>|<emphasis
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role="bold">ipp2p</emphasis>|<emphasis
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role="bold">ipp2p:udp</emphasis>|<emphasis
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role="bold">ipp2p:all</emphasis>|<emphasis>protocol-number</emphasis>|<emphasis>protocol-name</emphasis>|<emphasis
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role="bold">all}</emphasis></term>
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<listitem>
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<para>Protocol - <emphasis role="bold">ipp2p</emphasis> requires
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ipp2p match support in your kernel and iptables.</para>
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<para>Beginning with Shorewall 4.5.12, this column can accept a
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comma-separated list of protocols.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">PORT(S)</emphasis> (dport) - [<emphasis
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role="bold">-</emphasis>|<emphasis>port-name-number-or-range</emphasis>[<emphasis
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role="bold">,</emphasis><emphasis>port-name-number-or-range</emphasis>]...]</term>
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<listitem>
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<para>Optional destination Ports. A comma-separated list of Port
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names (from services(5)), <emphasis>port number</emphasis>s or
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<emphasis>port range</emphasis>s; if the protocol is <emphasis
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role="bold">icmp</emphasis>, this column is interpreted as the
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destination icmp-type(s). ICMP types may be specified as a numeric
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type, a numeric type and code separated by a slash (e.g., 3/4), or a
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typename. See <ulink
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url="/configuration_file_basics.htm#ICMP">http://www.shorewall.net/configuration_file_basics.htm#ICMP</ulink>.</para>
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<para>If the protocol is <emphasis role="bold">ipp2p</emphasis>,
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this column is interpreted as an ipp2p option without the leading
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"--" (example <emphasis role="bold">bit</emphasis> for bit-torrent).
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If no PORT is given, <emphasis role="bold">ipp2p</emphasis> is
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assumed.</para>
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<para>This column is ignored if PROTOCOL = all but must be entered
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if any of the following field is supplied. In that case, it is
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suggested that this field contain "-"</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">SOURCE PORT(S)</emphasis> (sport) -
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[<emphasis
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role="bold">-</emphasis>|<emphasis>port-name-number-or-range</emphasis>[<emphasis
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role="bold">,</emphasis><emphasis>port-name-number-or-range</emphasis>]...]</term>
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<listitem>
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<para>Optional source port(s). If omitted, any source port is
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acceptable. Specified as a comma-separated list of port names, port
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numbers or port ranges.</para>
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<para>Beginning with Shorewall 4.5.15, you may place '=' in this
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column, provided that the DEST PORT(S) column is non-empty. This
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causes the rule to match when either the source port or the
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destination port in a packet matches one of the ports specified in
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DEST PORTS(S). Use of '=' requires multi-port match in your iptables
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and kernel.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">USER</emphasis> - [<emphasis
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role="bold">!</emphasis>][<emphasis>user-name-or-number</emphasis>][<emphasis
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role="bold">:</emphasis><emphasis>group-name-or-number</emphasis>]</term>
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<listitem>
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<para>This optional column may only be non-empty if the SOURCE is
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the firewall itself.</para>
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<para>When this column is non-empty, the rule applies only if the
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program generating the output is running under the effective
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<emphasis>user</emphasis> and/or <emphasis>group</emphasis>
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specified (or is NOT running under that id if "!" is given).</para>
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<para>Examples:</para>
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<variablelist>
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<varlistentry>
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<term>joe</term>
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<listitem>
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<para>program must be run by joe</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>:kids</term>
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<listitem>
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<para>program must be run by a member of the 'kids'
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group</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>!:kids</term>
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<listitem>
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<para>program must not be run by a member of the 'kids'
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group</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">MARK</emphasis> - [<emphasis
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role="bold">!</emphasis>]<emphasis>value</emphasis>[/<emphasis>mask</emphasis>][<emphasis
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role="bold">:C</emphasis>]</term>
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<listitem>
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<para>Defines a test on the existing packet or connection mark. The
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rule will match only if the test returns true.</para>
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<para>If you don't want to define a test but need to specify
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anything in the following columns, place a "-" in this field.</para>
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<variablelist>
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<varlistentry>
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<term>!</term>
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<listitem>
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<para>Inverts the test (not equal)</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis>value</emphasis></term>
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<listitem>
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<para>Value of the packet or connection mark.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis>mask</emphasis></term>
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<listitem>
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<para>A mask to be applied to the mark before testing.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">:C</emphasis></term>
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<listitem>
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<para>Designates a connection mark. If omitted, the packet
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mark's value is tested.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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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>EXAMPLE</title>
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<para>Mark the first incoming packet of a connection on the loopback
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interface and destined for address ::1 and tcp port 3306 with context
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system_u:object_r:mysqld_t:s0 and save that context in the conntrack
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table. On subsequent input packets in the connection, set the context from
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the conntrack table.</para>
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<para><filename>/etc/shorewall6/interfaces</filename>:</para>
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<programlisting>#ZONE INTERFACE BROADCAST OPTIONS
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- lo - ignore</programlisting>
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<para><filename>/etc/shorewall6/secmarks</filename>:</para>
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<programlisting>#SECMARK CHAIN: SOURCE DEST PROTO DEST SOURCE USER/ MARK
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# STATE PORT(S) PORT(S) GROUP
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system_u:object_r:mysqld_packet_t:s0 I:N lo ::1 tcp 3306
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SAVE I:N
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RESTORE I:ER</programlisting>
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</refsect1>
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<refsect1>
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<title>FILES</title>
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<para>/etc/shorewall6/secmarks</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://james-morris.livejournal.com/11010.html">http://james-morris.livejournal.com/11010.html</ulink></para>
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<para><ulink
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url="/configuration_file_basics.htm#Pairs">http://www.shorewall.net/configuration_file_basics.htm#Pairs</ulink></para>
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<para>shorewall6(8), shorewall6-actions(5), shorewall6-blacklist(5),
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shorewall6-hosts(5), shorewall6-interfaces(5), shorewall6-maclist(5),
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shorewall6-netmap(5),shorewall6-params(5), shorewall6-policy(5),
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shorewall6-providers(5), shorewall6-rtrules(5),
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shorewall6-routestopped(5), shorewall6-rules(5), shorewall6.conf(5),
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shorewall6-tcclasses(5), shorewall6-tcdevices(5), shorewall6-mangle(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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