Smoothwall Express 3.0 with Multiple NAT

This is a must have for any Smoothwall Express Setup. This mod gives you full control of your interfaces including multiple IP addresses, ports and mac control:
The mod gives ultimate control with the following:
1.   Specify origin source IP/Network
2.   Specify the origin/destination ports to be open for your specific IP/Network
e.g. Open access for the IP on port 57 to your IP on port 22
To install the mod simply run the following from command line:
1.  wget
2.  sh ./
**NOTE: Smoothwall Express 3.0 should be up to and including update 9 – Maintenance > Updates.
Log back into the Smoothwall GUI and you will now see the Full Firewall Control interface.
For further reading take a look at below link: