flex-fw: masq function

masq

Masquearde source address for connections specifed by filter.

masq help | [action ACTION] [CHAIN] [FILTER]

ACTION := insert | append | delete

Change the default action defined in the file /etc/flex-fw/vars/base/action (usually append)

CHAIN := postrouting | chain IPTABLES_CHAIN

Iptables chain for adding new rules.

Default: postrouting

FILTER := [FROM] [TO] [proto PROTO]

FROM := src IPADDR

Source part of filter (only IP address allowed, no interface).

TO := { [out-if IFACE] [dst IPADDR] } | to ZONE

Destination part of filter.

PROTO := any | { tcp [SOURCE_PORT] [DESTINATION_PORT] } | { udp [SOURCE_PORT] [DESTINATION_PORT] } | PROTO_NUMBER

Network protocol and some rlated info.

IFACE := any | INTERFACE_NAME

Network interface name. any is a synonym for +.

IPADDR := any | IPv4_ADDRESS

IPv4 host or network address. For example: 192.168.0.12, 192.168.0.0/16. any is a synonym for 0.0.0.0/0.

ZONE := name of zone described in the file /etc/flex-fw/zones/zonename

The zonename file contains lines with interface name and IPv4 address per each line and divided by spaces. Look to zones for details.

SOURCE_PORT := sport PORT | sports PORT,PORT,...

Source port(s) for TCP or UDP protocol.

DESTINATION_PORT := dport PORT | dports PORT,PORT,...

Destination port(s) for TCP or UDP protocol.

PORT := any | priv | unpriv | PORT_NUMBER | PORT_NUMBER:PORT_NUMBER

Port of TCP or UDP protocol. any is equal 0:65535. priv is equal 0:1023. unpriv is equal 1024:65535.

PROTO_NUMBER := the numeric value specified in /etc/protocols.

Masquearde for all connections from LAN to Internet

masq src $netLan to zoneInet