ferm is described as 'Tool to maintain complex firewalls, without having the trouble to rewrite the complex rules over and over again. ferm allows the entire firewall rule set to be stored in a separate file, and to be loaded with one command' and is a Firewall in the security & privacy category. There are five alternatives to ferm for Linux. The best ferm alternative is Shorewall, which is both free and Open Source. Other great apps like ferm are ConfigServer Firewall, Advanced Policy Firewall, iptablesbuild and foomuuri.
The Shoreline Firewall, more commonly known as “Shorewall”, is high-level tool for configuring Netfilter. You describe your firewall/gateway requirements using entries in a set of configuration files. Shorewall reads those configuration files and with the help of the iptables...
A Stateful Packet Inspection (SPI) firewall, Login/Intrusion Detection and Security application for Linux servers.
Server-based firewall. Reacts to attacks with intelligent abilities to detect malicious attempts to enter and reacting by blocking the IP temporarily. Repeated hits will ban the IP completely.
iptablesbuild is effectively a configuration manager for iptables. It is intended to manage iptables configurations in a centralized location for multiple systems.
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