The SINUS firewall is a free and easy way to protect your network from the daily threats of the Internet. Features filtering of all header fields in the IP,TCP,UDP,ICMP,IGMP packets, intelligent RIP and FTP support, easy to understand, text-based configuration, graphical management interface for configuration of several firewalls, dynamic rules, including counters and time-outs, extensive logging, alerting, and counter intelligence, and prevention of packet and address spoofing. Works with the linux 2.2.x kernels.
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