OpenSnitch is a GNU/Linux port of the Little Snitch firewall
Anti Spam SMTP Gateway
Next Generation Open Source Firewall
Add rule to windows firewall to block inbound and outbound traffic
Generació regles IPTables per Continents o Països
Tool to ping hosts through firewalls blocking ICMP
Program to block League of Legends contacts.
Bypass your ISP's firewalls and connect to the internet!
360-FAAR Analyze FW1 Cisco Netscreen Policy Offline Using Config/Logs
track log files, block intrusions, and much more
Open source voucher management / hotspot system
Linux firewall distribution geared towards home and SOHO users.
Programmable completion code (bash) for ipset (netfilter.org)
High interaction honeypot solution for Linux based systems
Jateway is a general purpose TCP/IP connection proxy
network control and reporting
KnockIt! is a port Knocking tool for MAC OSX
a secure, open source OS for use inside USEagency facilities
Disconnect your children from the Internet after bedtime.
Firewall/Proxy FreeBSD