I have two LAMP servers, one with Ubuntu 9.10 the other with Ubuntu 8.04. Can someone recommend firewall software for them? I was following the guide at http://library.linode.com/networking/arno-iptables-firewall-debian-lenny, but ran into errors:
/sbin/iptables: (1) iptables: No chain/target/match by that name.
I'd like to allow ports 22, 25, 80, 443, 993, 995 and 10000.
If you can also suggest a step by step guide to install the firewall too, that would be great