Firewall with Avast!

[Apokarteron]

Which is the best FREE firewall which will work with Avast! on a Pentium 3 - 450MHz PC (which I found dumped on a sidewalk)?

 

[Buzz1927]

With a slow comp like that you need something light on resources, go with Kerio 2.1.5.
http://download.kerio.com/dwn/kpf/kerio-pf-2.1.5-en-win.exe