SHOREWALL6-NETMAP(5) | [FIXME: manual] | SHOREWALL6-NETMAP(5) |
NAME¶
netmap - Shorewall6 NETMAP definition fileSYNOPSIS¶
/etc/shorewall/netmap
DESCRIPTION¶
This file is used to map addresses in one network to corresponding addresses in a second network. It was added in Shorewall6 iin 4.4.23.3.Must be DNAT or SNAT 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 shorewall6 show capabilities).
If DNAT:P, traffic entering INTERFACE and addressed to NET1 has its destination
address rewritten to the corresponding address in NET2.
If 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.,
2001:470:b:227/64). Beginning in Shorewall6 4.4.24, exclusion[1] is
supported.
INTERFACE - interface
The name of a network interface. The interface
must be defined in shorewall6-interfaces[2](5). Shorewall allows loose
matches to wildcard entries in shorewall6-interfaces[2](5). For
example, ppp0 in this file will match a shorewall6-interfaces[2](8)
entry that defines ppp+.
NET2 - network-address
Network in CIDR format
NET3 - network-address
Optional - added in Shorewall 4.4.11. If
specified, qualifies INTERFACE. It specifies a SOURCE network for DNAT rules
and a DESTINATON network for SNAT rules.
PROTO (Optional - protocol-number-or-name
Only packets specifying this protocol will
have their IP header modified.
DEST PORT(S) (dport) - port-number-or-name-list
Destination Ports. An optional 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
numberic 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 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/netmapSEE ALSO¶
http://shorewall.net/netmap.html http://shorewall.net/configuration_file_basics.htm#PairsNOTES¶
- 1.
- exclusion
- 2.
- shorewall6-interfaces
06/28/2012 | [FIXME: source] |