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shorewall_code/Shorewall6/manpages/shorewall6-tunnels.xml
Tom Eastep 44e0d48fc5 Add <refmiscinfo>...</refmiscinfo> to remaining manpages
Signed-off-by: Tom Eastep <teastep@shorewall.net>
2014-01-16 08:32:57 -08:00

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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>shorewall6-tunnels</refentrytitle>
<manvolnum>5</manvolnum>
<refmiscinfo>Configuration Files</refmiscinfo>
</refmeta>
<refnamediv>
<refname>tunnels</refname>
<refpurpose>Shorewall6 VPN definition file</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>/etc/shorewall6/tunnels</command>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>The tunnels file is used to define rules for encapsulated (usually
encrypted) traffic to pass between the Shorewall6 system and a remote
gateway. Traffic flowing through the tunnel is handled using the normal
zone/policy/rule mechanism. See <ulink
url="/VPNBasics.html">http://www.shorewall.net/VPNBasics.html</ulink> for
details.</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">TYPE</emphasis> - {<emphasis
role="bold">ipsec</emphasis>[<emphasis
role="bold">:{noah</emphasis>|ah}]|<emphasis
role="bold">ipsecnat</emphasis>|<emphasis
role="bold">gre</emphasis>|l2tp|<emphasis
role="bold">pptpclient</emphasis>|<emphasis
role="bold">pptpserver</emphasis>|{<emphasis
role="bold">openvpn</emphasis>|<emphasis
role="bold">openvpnclient</emphasis>|<emphasis
role="bold">openvpnserver</emphasis>}[:{<emphasis
role="bold">tcp</emphasis>|<emphasis
role="bold">udp</emphasis>}]<emphasis
role="bold">[</emphasis>:<emphasis>port</emphasis>]|<emphasis
role="bold">generic</emphasis><emphasis
role="bold">:</emphasis><emphasis>protocol</emphasis>[<emphasis
role="bold">:</emphasis><emphasis>port</emphasis>]}</term>
<listitem>
<para>Types are as follows:</para>
<programlisting> <emphasis role="bold">ipsec</emphasis> - IPv6 IPSEC
<emphasis role="bold">ipsecnat</emphasis> - IPv6 IPSEC with NAT Traversal (UDP port 4500 encapsulation)
<emphasis role="bold">gre</emphasis> - Generalized Routing Encapsulation (Protocol 47)
<emphasis role="bold">l2tp</emphasis> - Layer 2 Tunneling Protocol (UDP port 1701)
<emphasis role="bold">openvpn</emphasis> - OpenVPN in point-to-point mode
<emphasis role="bold">openvpnclient</emphasis> - OpenVPN client runs on the firewall
<emphasis role="bold">openvpnserver</emphasis> - OpenVPN server runs on the firewall
<emphasis role="bold">generic</emphasis> - Other tunnel type</programlisting>
<para>If the type is <emphasis role="bold">ipsec</emphasis>, it may
be followed by <emphasis role="bold">:ah</emphasis> to indicate that
the Authentication Headers protocol (51) is used by the tunnel (the
default is <option>:noah</option> which means that protocol 51 is
not used). NAT traversal is only supported with ESP (protocol 50) so
<emphasis role="bold">ipsecnat</emphasis> tunnels don't allow the
<emphasis role="bold">ah</emphasis> option (<emphasis
role="bold">ipsecnat:noah</emphasis> may be specified but is
redundant).</para>
<para>If type is <emphasis role="bold">openvpn</emphasis>, <emphasis
role="bold">openvpnclient</emphasis> or <emphasis
role="bold">openvpnserver</emphasis> it may optionally be followed
by ":" and <emphasis role="bold">tcp</emphasis> or <emphasis
role="bold">udp</emphasis> to specify the protocol to be used. If
not specified, <emphasis role="bold">udp</emphasis> is assumed.
Note: At this writing, OpenVPN does not support IPv6.</para>
<para>If type is <emphasis role="bold">openvpn</emphasis>, <emphasis
role="bold">openvpnclient</emphasis> or <emphasis
role="bold">openvpnserver</emphasis> it may optionally be followed
by ":" and the port number used by the tunnel. if no ":" and port
number are included, then the default port of 1194 will be used. .
Where both the protocol and port are specified, the protocol must be
given first (e.g., openvpn:tcp:4444).</para>
<para>If type is <emphasis role="bold">generic</emphasis>, it must
be followed by ":" and a protocol name (from /etc/protocols) or a
protocol number. If the protocol is <emphasis
role="bold">tcp</emphasis> or <emphasis role="bold">udp</emphasis>
(6 or 17), then it may optionally be followed by ":" and a port
number.</para>
<para>Comments may be attached to Netfilter rules generated from
entries in this file through the use of COMMENT lines. These lines
begin with the word COMMENT; 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>
<note>
<para>Beginning with Shorewall 4.5.11, ?COMMENT is a synonym for
COMMENT and is preferred.</para>
</note>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">ZONE</emphasis> -
<emphasis>zone</emphasis></term>
<listitem>
<para>The <emphasis>zone</emphasis> of the physical interface
through which tunnel traffic passes. This is normally your internet
zone.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">GATEWAY</emphasis>(S) (gateway or
gateways) - <emphasis>address-or-range</emphasis> <emphasis
role="bold">[ , ... ]</emphasis></term>
<listitem>
<para>The IP address of the remote tunnel gateway. If the remote
gateway has no fixed address (Road Warrior) then specify the gateway
as <emphasis role="bold">::/0</emphasis>. May be specified as a
network address and if your kernel and ip6tables include iprange
match support then IP address ranges are also allowed.</para>
<para>Beginning with Shorewall 4.5.3, a list of addresses or ranges
may be given. Exclusion (<ulink
url="/manpages6/shorewall6-exclusion.html">shorewall6-exclusion</ulink>
(5) ) is not supported.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">GATEWAY ZONE(S)</emphasis> (gateway_zone
or gateway_zones) - [<emphasis>zone</emphasis>[<emphasis
role="bold">,</emphasis><emphasis>zone</emphasis>]...]</term>
<listitem>
<para>Optional. If the gateway system specified in the third column
is a standalone host then this column should contain a
comma-separated list of the names of the zones that the host might
be in. This column only applies to IPSEC tunnels where it enables
ISAKMP traffic to flow through the tunnel to the remote
gateway(s).</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Example</title>
<variablelist>
<varlistentry>
<term>Example 1:</term>
<listitem>
<para>IPSec tunnel.</para>
<para>The remote gateway is 2001:cec792b4:1::44. The tunnel does not
use the AH protocol</para>
<programlisting> #TYPE ZONE GATEWAY
ipsec:noah net 2002:cec792b4:1::44</programlisting>
</listitem>
</varlistentry>
<varlistentry>
<term>Example 2:</term>
<listitem>
<para>Road Warrior (LapTop that may connect from anywhere) where the
"gw" zone is used to represent the remote LapTop</para>
<programlisting> #TYPE ZONE GATEWAY GATEWAY ZONES
ipsec net ::/0 gw</programlisting>
</listitem>
</varlistentry>
<varlistentry>
<term>Example 3:</term>
<listitem>
<para>Host 2001:cec792b4:1::44 is a standalone system connected via
an ipsec tunnel to the firewall system. The host is in zone
gw.</para>
<programlisting> #TYPE ZONE GATEWAY GATEWAY ZONES
ipsec net 2001:cec792b4:1::44 gw</programlisting>
</listitem>
</varlistentry>
<varlistentry>
<term>Example 4:</term>
<listitem>
<para>OPENVPN tunnel. The remote gateway is 2001:cec792b4:1::44 and
openvpn uses port 7777.</para>
<programlisting> #TYPE ZONE GATEWAY GATEWAY ZONES
openvpn:7777 net 2001:cec792b4:1::44</programlisting>
</listitem>
</varlistentry>
<varlistentry>
<term>Example 8:</term>
<listitem>
<para>You have a tunnel that is not one of the supported types. Your
tunnel uses UDP port 4444. The other end of the tunnel is
2001:cec792b4:1::44.</para>
<programlisting> #TYPE ZONE GATEWAY GATEWAY ZONES
generic:udp:4444 net 2001:cec792b4:1::44</programlisting>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>FILES</title>
<para>/etc/shorewall6/tunnels</para>
</refsect1>
<refsect1>
<title>See ALSO</title>
<para><ulink
url="/configuration_file_basics.htm#Pairs">http://www.shorewall.net/configuration_file_basics.htm#Pairs</ulink></para>
<para>shorewall6(8), shorewall6-accounting(5), shorewall6-actions(5),
shorewall6-blacklist(5), shorewall6-hosts(5), shorewall6-interfaces(5),
shorewall6-maclist(5), shorewall6-netmap(5),shorewall6-params(5),
shorewall6-policy(5), shorewall6-providers(5), shorewall6-rtrules(5),
shorewall6-routestopped(5), shorewall6-rules(5), shorewall6.conf(5),
shorewall6-secmarks(5), shorewall6-tcclasses(5), shorewall6-tcdevices(5),
shorewall6-mangle(5), shorewall6-tos(5), shorewall6-zones(5)</para>
</refsect1>
</refentry>