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shorewall6-tunnels(5)

NAME

   tunnels - Shorewall6 VPN definition file

SYNOPSIS

   /etc/shorewall6/tunnels

DESCRIPTION

   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
   http://www.shorewall.net/VPNBasics.html[1] for details.

   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).

   TYPE -
   {ipsec[:{noah|ah}]|ipsecnat|gre|l2tp|pptpclient|pptpserver|?COMMENT|{openvpn|openvpnclient|openvpnserver}[:{tcp|udp}][:port]|generic:protocol[:port]}
       Types are as follows:

                   ipsec         - IPv6 IPSEC
                   ipsecnat      - IPv6 IPSEC with NAT Traversal (UDP port 4500 encapsulation)
                   gre           - Generalized Routing Encapsulation (Protocol 47)
                   l2tp          - Layer 2 Tunneling Protocol (UDP port 1701)
                   openvpn       - OpenVPN in point-to-point mode
                   openvpnclient - OpenVPN client runs on the firewall
                   openvpnserver - OpenVPN server runs on the firewall
                   generic       - Other tunnel type
                   tinc          - TINC (added in Shorewall 4.6.6)

       If the type is ipsec, it may be followed by :ah to indicate that
       the Authentication Headers protocol (51) is used by the tunnel (the
       default is :noah which means that protocol 51 is not used). NAT
       traversal is only supported with ESP (protocol 50) so ipsecnat
       tunnels don't allow the ah option (ipsecnat:noah may be specified
       but is redundant).

       If type is openvpn, openvpnclient or openvpnserver it may
       optionally be followed by ":" and tcp or udp to specify the
       protocol to be used. If not specified, udp is assumed. Note: At
       this writing, OpenVPN does not support IPv6.

       If type is openvpn, openvpnclient or openvpnserver 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).

       If type is generic, it must be followed by ":" and a protocol name
       (from /etc/protocols) or a protocol number. If the protocol is tcp
       or udp (6 or 17), then it may optionally be followed by ":" and a
       port number.

       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.

   ZONE - zone
       The zone of the physical interface through which tunnel traffic
       passes. This is normally your internet zone.

   GATEWAY(S) (gateway or gateways) - address-or-range [ , ... ]
       The IP address of the remote tunnel gateway. If the remote gateway
       has no fixed address (Road Warrior) then specify the gateway as
       ::/0. May be specified as a network address and if your kernel and
       ip6tables include iprange match support then IP address ranges are
       also allowed.

       Beginning with Shorewall 4.5.3, a list of addresses or ranges may
       be given. Exclusion (shorewall6-exclusion[2] (5) ) is not
       supported.

   GATEWAY ZONE(S) (gateway_zone or gateway_zones) - [zone[,zone]...]
       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).

EXAMPLE

   Example 1:
       IPSec tunnel.

       The remote gateway is 2001:cec792b4:1::44. The tunnel does not use
       the AH protocol

                   #TYPE           ZONE    GATEWAY
                   ipsec:noah      net     2002:cec792b4:1::44

   Example 2:
       Road Warrior (LapTop that may connect from anywhere) where the "gw"
       zone is used to represent the remote LapTop

                   #TYPE           ZONE    GATEWAY                 GATEWAY ZONES
                   ipsec           net     ::/0                    gw

   Example 3:
       Host 2001:cec792b4:1::44 is a standalone system connected via an
       ipsec tunnel to the firewall system. The host is in zone gw.

                   #TYPE           ZONE    GATEWAY                 GATEWAY ZONES
                   ipsec           net     2001:cec792b4:1::44     gw

   Example 4:
       OPENVPN tunnel. The remote gateway is 2001:cec792b4:1::44 and
       openvpn uses port 7777.

                   #TYPE           ZONE    GATEWAY                 GATEWAY ZONES
                   openvpn:7777    net     2001:cec792b4:1::44

   Example 8:
       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.

                   #TYPE            ZONE    GATEWAY                GATEWAY ZONES
                   generic:udp:4444 net     2001:cec792b4:1::44

   Example 9:
       TINC tunnel where the remote gateways are not specified. If you
       wish to specify a list of gateways, you can do so in the GATEWAY
       column.

                   #TYPE            ZONE    GATEWAY          GATEWAY ZONES
                   tinc             net     ::/0

FILES

   /etc/shorewall6/tunnels

SEE ALSO

   http://www.shorewall.net/configuration_file_basics.htm#Pairs[3]

   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)

NOTES

    1. http://www.shorewall.net/VPNBasics.html
       http://www.shorewall.net/VPNBasics.html

    2. shorewall6-exclusion
       http://www.shorewall.net/manpages6/shorewall6-exclusion.html

    3. http://www.shorewall.net/configuration_file_basics.htm#Pairs
       http://www.shorewall.net/configuration_file_basics.htm#Pairs



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