IPfire

Let’s say you have an internal /24 network and you want to add a secondary (local) IP address (this could be useful in case you remove an old machine from the network and your new firewall is on a different address - but your new firewall should offer on of it’s services on the old address). In the ipfire GUI this is not possible. But you can use the file “rc.

Let’s say you have a /29 network on your DSL subscriber (dial) line: 212.218.10.64/29. In that case you could use six ip adresses (65 to 70) as public addresses for machines or services behind your firewall. According to this thread and this thread it is not possible. But it is possible - and i will show you how. 1.) Enable SSH access in ipfire and connect to ipfire as root. 2.