Easy to use firewall for linux beginners.
Easy Firewall Script
Drop specified IP n seconds remotely, auto-undrop it when timeout.
iptables web interface
Distributed reverse / forward proxy and tunneling solution for TCP.
IDS + IPS for RouterOS (mikrotik)
A map server for local use.
Detect Flooder IPs, Reduce Attack Surface against HTTP Flood Attacks
Block undesired IPs for vsftp
ISeeWhatYouAreDoing - a tool for remote acces with very! low bandwith.