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shorewall_code/Shorewall/manpages/shorewall-secmarks.xml
Tuomo Soini be924ff765
Fix http links to point to current project website 
Also removes deprecated Shorewall6/configfiles/masq

Signed-off-by: Tuomo Soini <tis@foobar.fi>
Signed-off-by: Tom Eastep <teastep@shorewall.net>
2020-03-27 14:24:37 -07:00

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<?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-secmarks</refentrytitle>
<manvolnum>5</manvolnum>
<refmiscinfo>Configuration Files</refmiscinfo>
</refmeta>
<refnamediv>
<refname>secmarks</refname>
<refpurpose>Shorewall file</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>/etc/shorewall[6]/secmarks</command>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<important>
<para>Unlike rules in the <ulink
url="shorewall-rules.html">shorewall-rules</ulink>(5) file,
evaluation of rules in this file will continue after a match. So the
final secmark for each packet will be the one assigned by the LAST rule
that matches.</para>
</important>
<para>The secmarks file is used to associate an SELinux context with
packets. It was added in Shorewall version 4.4.13.</para>
<para>The columns in the file are as follows (where the column name is
followed by a different name in parentheses, the different name is used in
the alternate specification syntax).</para>
<variablelist>
<varlistentry>
<term><emphasis role="bold">SECMARK -
{SAVE|RESTORE|<replaceable>context</replaceable>|?COMMENT
<replaceable>comment</replaceable>}</emphasis></term>
<listitem>
<variablelist>
<varlistentry>
<term><emphasis role="bold">SAVE</emphasis></term>
<listitem>
<para>If an SELinux context is associated with the packet, the
context is saved in the connection. Normally, the remaining
columns should be left blank.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">RESTORE</emphasis></term>
<listitem>
<para>If an SELinux context is not currently associated with
the packet, then the saved context (if any) is associated with
the packet. Normally, the remaining columns should be left
blank.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable role="bold">context</replaceable></term>
<listitem>
<para>An SELinux context.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>?COMMENT</term>
<listitem>
<para>The remainder of the line is treated as a comment which
is attached to subsequent rules until another ?COMMENT line is
found or until the end of the file is reached. To stop adding
comments to rules, use a line with only the word
?COMMENT.</para>
</listitem>
</varlistentry>
</variablelist>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">CHAIN -
{P|I|F|O|T}[:{N|I|U|IU|NI|NU|NIU|NUI:E|ER}]</emphasis></term>
<listitem>
<para>This column determines the CHAIN where the SELinux context is
to be applied:</para>
<simplelist>
<member>P - PREROUTING</member>
<member>I - INPUT</member>
<member>F - FORWARD</member>
<member>O - OUTPUT</member>
<member>T - POSTROUTING</member>
</simplelist>
<para>It may be optionally followed by a colon and an indication of
the Netfilter connection state(s) at which the context is to be
applied:</para>
<simplelist>
<member>:N - NEW connection</member>
<member>:I - INVALID connection</member>
<member>:NI - NEW or INVALID connection</member>
<member>:E - ESTABLISHED connection</member>
<member>:ER - ESTABLISHED or RELATED connection</member>
</simplelist>
<para>Beginning with Shorewall 4.5.10, the following additional
options are available</para>
<simplelist>
<member>:U - UNTRACKED connection</member>
<member>:IU - INVALID or UNTRACKED connection</member>
<member>:NU - NEW or UNTRACKED connection</member>
<member>:NIU - NEW, INVALID or UNTRACKED connection.</member>
</simplelist>
<para>This column was formerly labelled CHAIN:STATE.</para>
</listitem>
</varlistentry>
</variablelist>
<variablelist>
<varlistentry>
<term><emphasis role="bold">SOURCE</emphasis> - {<emphasis
role="bold">-</emphasis><emphasis>interface</emphasis>|[<emphasis>interface</emphasis>:]<emphasis>address-or-range</emphasis>[<emphasis
role="bold">,</emphasis><emphasis>address-or-range</emphasis>]...}[<emphasis>exclusion</emphasis>]</term>
<listitem>
<para>May be:</para>
<orderedlist>
<listitem>
<para>An interface name - matches traffic entering the firewall
on the specified interface. May not be used in classify rules or
in rules using the T in the CHAIN column.</para>
</listitem>
<listitem>
<para>A comma-separated list of host or network IP addresses or
MAC addresses.</para>
</listitem>
<listitem>
<para>An interface name followed by a colon (":") followed by a
comma-separated list of host or network IP addresses or MAC
addresses.</para>
</listitem>
</orderedlist>
<para>MAC addresses must be prefixed with "~" and use "-" as a
separator.</para>
<para>Example: ~00-A0-C9-15-39-78</para>
<para>You may exclude certain hosts from the set already defined
through use of an <emphasis>exclusion</emphasis> (see <ulink
url="shorewall-exclusion.html">shorewall-exclusion</ulink>(5)).</para>
<para>Addresses may be specified using an ipset name preceded by
'+'.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">DEST</emphasis> - {<emphasis
role="bold">-</emphasis>|{<emphasis>interface</emphasis>|[<emphasis>interface</emphasis>:]<emphasis>address-or-range</emphasis>[<emphasis
role="bold">,</emphasis><emphasis>address-or-range</emphasis>]...}[<emphasis>exclusion</emphasis>]</term>
<listitem>
<para>May be:</para>
<orderedlist>
<listitem>
<para>An interface name. May not be used in the PREROUTING or
INPUT chains. The interface name may be optionally followed by a
colon (":") and an IP address list.</para>
</listitem>
<listitem>
<para>A comma-separated list of host or network IP addresses.
The list may include ip address ranges if your kernel and
iptables include iprange support.</para>
</listitem>
</orderedlist>
<para>You may exclude certain hosts from the set already defined
through use of an <emphasis>exclusion</emphasis> (see <ulink
url="shorewall-exclusion.html">shorewall-exclusion</ulink>(5)).</para>
<para>Addresses may be specified using an ipset name preceded by
'+'.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">PROTO</emphasis> - {<emphasis
role="bold">-</emphasis>|<emphasis
role="bold">tcp:syn</emphasis>|<emphasis
role="bold">ipp2p</emphasis>|<emphasis
role="bold">ipp2p:udp</emphasis>|<emphasis
role="bold">ipp2p:all</emphasis>|<emphasis>protocol-number</emphasis>|<emphasis>protocol-name</emphasis>|<emphasis
role="bold">all}[,...]</emphasis></term>
<listitem>
<para>See <ulink
url="shorewall-rules.html">shorewall-rules(5)</ulink> for
details.</para>
<para>Beginning with Shorewall 4.5.12, this column can accept a
comma-separated list of protocols.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">DPORT</emphasis> - [<emphasis
role="bold">-</emphasis>|<emphasis>port-name-number-or-range</emphasis>[<emphasis
role="bold">,</emphasis><emphasis>port-name-number-or-range</emphasis>]...]</term>
<listitem>
<para>Optional destination Ports. A comma-separated list of Port
names (from services(5)), <emphasis>port number</emphasis>s or
<emphasis>port range</emphasis>s; if the protocol is <emphasis
role="bold">icmp</emphasis>, this column is interpreted as the
destination icmp-type(s). ICMP types may be specified as a numeric
type, a numeric type and code separated by a slash (e.g., 3/4), or a
typename. See <ulink
url="../configuration_file_basics.htm#ICMP">https://shorewall.org/configuration_file_basics.htm#ICMP</ulink>.</para>
<para>If the protocol is <emphasis role="bold">ipp2p</emphasis>,
this column is interpreted as an ipp2p option without the leading
"--" (example <emphasis role="bold">bit</emphasis> for bit-torrent).
If no PORT is given, <emphasis role="bold">ipp2p</emphasis> is
assumed.</para>
<para>This column is ignored if PROTOCOL = all but must be entered
if any of the following field is supplied. In that case, it is
suggested that this field contain "-"</para>
<para>This column was formerly labelled DEST PORT(S).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">SPORT</emphasis> - [<emphasis
role="bold">-</emphasis>|<emphasis>port-name-number-or-range</emphasis>[<emphasis
role="bold">,</emphasis><emphasis>port-name-number-or-range</emphasis>]...]</term>
<listitem>
<para>Optional source port(s). If omitted, any source port is
acceptable. Specified as a comma-separated list of port names, port
numbers or port ranges.</para>
<para>This column was formerly labelled SOURCE PORT(S).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">USER</emphasis> - [<emphasis
role="bold">!</emphasis>][<emphasis>user-name-or-number</emphasis>][<emphasis
role="bold">:</emphasis><emphasis>group-name-or-number</emphasis>]</term>
<listitem>
<para>This optional column may only be non-empty if the SOURCE is
the firewall itself.</para>
<para>When this column is non-empty, the rule applies only if the
program generating the output is running under the effective
<emphasis>user</emphasis> and/or <emphasis>group</emphasis>
specified (or is NOT running under that id if "!" is given).</para>
<para>Examples:</para>
<variablelist>
<varlistentry>
<term>joe</term>
<listitem>
<para>program must be run by joe</para>
</listitem>
</varlistentry>
<varlistentry>
<term>:kids</term>
<listitem>
<para>program must be run by a member of the 'kids'
group</para>
</listitem>
</varlistentry>
<varlistentry>
<term>!:kids</term>
<listitem>
<para>program must not be run by a member of the 'kids'
group</para>
</listitem>
</varlistentry>
</variablelist>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">MARK</emphasis> - [<emphasis
role="bold">!</emphasis>]<emphasis>value</emphasis>[/<emphasis>mask</emphasis>][<emphasis
role="bold">:C</emphasis>]</term>
<listitem>
<para>Defines a test on the existing packet or connection mark. The
rule will match only if the test returns true.</para>
<para>If you don't want to define a test but need to specify
anything in the following columns, place a "-" in this field.</para>
<variablelist>
<varlistentry>
<term>!</term>
<listitem>
<para>Inverts the test (not equal)</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis>value</emphasis></term>
<listitem>
<para>Value of the packet or connection mark.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis>mask</emphasis></term>
<listitem>
<para>A mask to be applied to the mark before testing.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">:C</emphasis></term>
<listitem>
<para>Designates a connection mark. If omitted, the packet
mark's value is tested.</para>
</listitem>
</varlistentry>
</variablelist>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>EXAMPLE</title>
<para>Mark the first incoming packet of a connection on the loopback
interface and destined for address 127.0.0.1 and tcp port 3306 with
context system_u:object_r:mysqld_t:s0 and save that context in the
conntrack table. On subsequent input packets in the connection, set the
context from the conntrack table.</para>
<para><filename>/etc/shorewall/interfaces</filename>:</para>
<programlisting>#ZONE INTERFACE BROADCAST OPTIONS
- lo - ignore</programlisting>
<para><filename>/etc/shorewall/secmarks</filename>:</para>
<programlisting>#SECMARK CHAIN SOURCE DEST PROTO DPORT SPORT USER MARK
system_u:object_r:mysqld_packet_t:s0 I:N lo 127.0.0.1 tcp 3306
SAVE I:N lo 127.0.0.1 tcp 3306
RESTORE I:ER</programlisting>
</refsect1>
<refsect1>
<title>FILES</title>
<para>/etc/shorewall/secmarks</para>
<para>/etc/shorewall6/secmarks</para>
</refsect1>
<refsect1>
<title>See ALSO</title>
<para><ulink
url="http://james-morris.livejournal.com/11010.html">http://james-morris.livejournal.com/11010.html</ulink></para>
<para><ulink
url="../configuration_file_basics.htm#Pairs">https://shorewall.org/configuration_file_basics.htm#Pairs</ulink></para>
<para>shorewall(8)</para>
</refsect1>
</refentry>
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