This is following on from setting up Smoothwall with BT Infinity –

The issue I now had was giving our network a static IP address instead of Dynamic. This was to allow another host to allow a static IP through their Firewall.

The workaround for this was to assign an External (red) IP address to an Internal (Green) IP address.

BT will provide 5 extra static IPs for £5 per month.

To set this up:

1. Full Firewall – Multiple IPs
2. Set the required external red IP and the IP of the internal machine

Written by Matt Cooper
Hi, I'm Matt Cooper. I started this blog to pretty much act as a brain dump area for things I learn from day to day. You can contact me at: