Firewall log analyzer
Intelligently block brute-force attacks by aggregating system logs
Next Generation Open Source Firewall
Network Security Appliance Linux Distribution
Free UTM appliance: firewall, VPN, WAF and antivirus in one ISO.
Anti Spam SMTP Gateway
Tool to ping hosts through firewalls blocking ICMP
A java PCAP and DPI library
A simple, portable port scanner
Blocking and monitoring of network traffic based on geography.
One of the most advanced DNS Proxy and DNS Firewall in one product.
ipset set listing wrapper script
LumoGate is a Windows Wifi Hotspot Management Software
A powerful network security tool, easy, safe and totally free.
Powerfull Web Application Firewall for PHP
A client for the MikroTik RouterOS API protocol, written in PHP.
Webinterface to (un)ban IPs in Fail2Ban
track log files, block intrusions, and much more
Open source voucher management / hotspot system
bash programmable completion for conntrack-tools (netfilter.org)