Firewall/SOSDG is a Netfilter/IPTables firewall that is designed to be simple to use, yet powerful. It features support for standalone machines and routers (with NAT support).
SRFirewall is an easy to use, but still quite capable firewall for Netfilter/iptables. It is a complete rewrite of Firewall/SOSDG, designed to make it easy for users to configure and protect their Linux servers, routers, and gateways.
A client-server pair to register clients with dynamic IP addresses in hosts.allow.
A telephony engine for PBX, IVR, and gateways.