Shorewall is an open-source Linux firewall configuration tool written in Perl. As a user-friendly command-line front-end for iptables/tc utilities, Shorewall stores firewall policies in high-level, easy-to-understand plain-text configuration files. The built-in Shorewall compiler then compiles high-level firewall configurations into an executable firewall creation script which in turns invokes iptables and tc. Shorewall supports a wide range of firewall rules, based on blacklisting, masquerading (SNAT), port forwarding (DNAT), one-to-one static NAT, proxy ARP, traffic shaping, connection rate limiting, traffic accounting, IPv6, multiple zones, tunneling encapsulation (IPsec, GRE, OpenVPN, PPTP), etc. While Shorewall is a standalone command-line tool, Shorewall can be integrated with Webmin, which allows Shorewall’s firewall configurations to be managed via web-based interface.

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  • Platform: Linux
  • License: GNU GPLv2+
  • Documentation:
  • Source repository: git
  • Community: mailing list
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