SHOREWALL6-NETMAP(5) | Configuration Files | 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 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](5) 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
DESTINATION 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 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[3].
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://www.shorewall.net/netmap.html[4] http://www.shorewall.net/configuration_file_basics.htm#Pairs[5]NOTES¶
- 1.
- exclusion
- 2.
- shorewall6-interfaces
10/19/2014 | Configuration Files |