Greetings all, I was wondering if anyone could help me find a basic packet filtering firewall script that didn't involve nat'ting? I'm still very confused by the iptables setup and have tried ...

The rules you specify will be simple compared to the packet filter-only configuration; you’ll just block all incoming and outgoing IP traffic except the traffic going to and from the server ...

Many broadband routers have basic firewall functionality built in, but these tend to be simple packet filtering firewalls.

Learn how firewalls have progressed from simple packet filtering to more sophisticated application-level filtering.