Easy to use goal oriented GUI. You say what the firewall should do without having to explain all the details of how it should do it.
Application protocol based. Unlike other tools, Guarddog does not require you to understand the ins and outs of IP packets and ports. Guarddog takes care of this for you. This also reduces the chances of configuration mistakes being made which are a prime source of security flaws.
Doesn't just generate the firewall once and forgets it. Guarddog is used to maintain and modify the firewall in place.
Allows you to divide your network into groups of machines and control what protocols are allowed between them.
Works on the older Linux kernel 2.2 series ipchains firewall subsystem, and also on newer Linux kernel 2.4 netfilter/ iptables firewall subsystem.
Takes advantage of advanced Linux kernel 2.4 features such as connection tracking and rate limited logging.
Licensed under the terms of the GPL. Is Free and will remain Free.