OpenSnitch is a GNU/Linux port of the Little Snitch firewall
CacheGuard Gateway is a UTM, a WAF, and a QoS management appliance.
Anti Spam SMTP Gateway
Generació regles IPTables per Continents o Països
Add rule to windows firewall to block inbound and outbound traffic
Tool to ping hosts through firewalls blocking ICMP
Program to block League of Legends contacts.
track log files, block intrusions, and much more
High interaction honeypot solution for Linux based systems
[UPDATE 28-10-2015] FINAL MULTIPLINK SSH LIFETIME v2.0 UP-5 "FAREWELL"
a secure, open source OS for use inside USEagency facilities
Firewall/Proxy FreeBSD
Managing OpenBSD's Packet Filter with Python