Shorewall

Shorewall: Open Source Firewall Configuration Tools

Shorewall is an open source firewall configuration tool for Linux operating systems. It provides a command-line interface and configuration files to easily set up Netfilter rules, interfaces, zones, and other common firewall components.

What is Shorewall?

Shorewall is an open source firewall tool for Linux systems that provides an easy way to configure Netfilter firewall rules and setup. It allows administrators to generate firewall configurations through a set of easy-to-understand configuration files and command-line tools rather than having to write complex iptables commands directly.

Some key features of Shorewall include:

• Configuration files to define zones, interfaces, policies, rules, routers, etc.
• Command-line tools to generate, start, stop, and restart the firewall
• Pre-defined templates for common firewall setups
• Support for broadcast, unicast, multicat, bridging, tunneling and TPP
• Logging and alerting capabilities

By abstracting low-level details of iptables, Shorewall makes it simpler to build complex firewalls without deep expertise of Netfilter internals. It also makes firewall management easier by centralizing configuration in easy-to-edit files. This allows for easier auditing, sharing, and backup of firewall policies across servers.

Shorewall configuration is completely compatible with iptables. Under the hood, Shorewall simply takes the high-level configuration files and generates the corresponding iptables-restore statements automatically. So it provides a friendlier interface without sacrificing flexibility or performance.

Shorewall Features

Official Links