NAME

       netmap - Shorewall NETMAP definition file

SYNOPSIS

       /etc/shorewall/netmap

DESCRIPTION

       This file is used to map addresses in one network to corresponding addresses in a second
       network.

           Warning
           To use this file, your kernel and iptables must have NETMAP support included.

       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 - {DNAT|SNAT}[:{P|O|T}]
           Must be DNAT or SNAT; beginning with Shorewall 4.4.23, may be optionally followed by
           :P, :O or :T to perform stateless NAT. Stateless NAT requires Rawpost Table support in
           your kernel and iptables (see the output of shorewall show capabilities).

           If DNAT or DNAT:P, traffic entering INTERFACE and addressed to NET1 has its
           destination address rewritten to the corresponding address in NET2.

           If SNAT or SNAT:T, traffic leaving INTERFACE with a source address in NET1 has it's
           source address rewritten to the corresponding address in NET2.

           If DNAT:O, traffic originating on the firewall and leaving via INTERFACE and addressed
           to NET1 has its destination address rewritten to the corresponding address in NET2.

           If DNAT:P, traffic entering via INTERFACE and addressed to NET1 has its destination
           address rewritten to the corresponding address in NET2.

           If SNAT:P, traffic entering via INTERFACE with a destination address in NET1 has it's
           source address rewritten to the corresponding address in NET2.

           If SNAT:O, traffic originating on the firewall and leaving via INTERFACE with a source
           address in NET1 has it's source address rewritten to the corresponding address in
           NET2.

       NET1 - network-address
           Network in CIDR format (e.g., 192.168.1.0/24). Beginning with Shorewall 4.4.24,
           exclusion[1] is supported.

       INTERFACE - interface
           The name of a network interface. The interface must be defined in
           shorewall-interfaces[2](5). Shorewall allows loose matches to wildcard entries in
           shorewall-interfaces[2](5). For example, ppp0 in this file will match a
           shorewall-interfaces[2](8) entry that defines ppp+.

       NET2 - network-address
           Network in CIDR format

       NET3 (Optional) - network-address
           Added in Shorewall 4.4.11. If specified, qualifies INTERFACE. It specifies a SOURCE
           network for DNAT rules and a DESTINATION network for SNAT rules.

       PROTO - protocol-number-or-name
           Optional -- added in Shorewall 4.4.23.2. Only packets specifying this protocol will
           have their IP header modified.

       DEST PORT(S) (dport) - port-number-or-name-list
           Optional - added in Shorewall 4.4.23.2. Destination Ports. A comma-separated list of
           Port names (from services(5)), port numbers or port ranges; if the protocol is icmp,
           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 http://www.shorewall.net/configuration_file_basics.htm#ICMP.

           If the protocol is ipp2p, this column is interpreted as an ipp2p option without the
           leading "--" (example bit for bit-torrent). If no PORT is given, ipp2p is assumed.

           An entry in this field requires that the PROTO column specify icmp (1), tcp (6), udp
           (17), sctp (132) or udplite (136). Use '-' if any of the following field is supplied.

       SOURCE PORT(S) (sport) - port-number-or-name-list
           Optional -- added in Shorewall 4.4.23.2. Source port(s). If omitted, any source port
           is acceptable. Specified as a comma-separated list of port names, port numbers or port
           ranges.

           An entry in this field requires that the PROTO column specify tcp (6), udp (17), sctp
           (132) or udplite (136). Use '-' if any of the following fields is supplied.

FILES

       /etc/shorewall/netmap

SEE ALSO

       http://shorewall.net/netmap.html

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

       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-params(5), shorewall-policy(5),
       shorewall-providers(5), shorewall-proxyarp(5), shorewall-rtrules(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), shorewall-zones(5)

NOTES

        1. exclusion
           http://www.shorewall.netshorewall-exclusion.html

        2. shorewall-interfaces
           http://www.shorewall.netshorewall-interfaces.html

[FIXME: source]                             01/30/2014                        SHOREWALL-NETMAP(5)