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AFWall+ (Android Firewall +) - iptables based firewall for Android
A firewall for humans...
Ansible Role - iptables Firewall configuration.
Netflow iptables module for Linux kernel (official)
Tor Iptables script is an anonymizer that sets up iptables and tor to route all services and traffic including DNS through the tor network.
Daily feed of bad IPs (with blacklist hit scores)
An implementation of committed access rate, or simply rate limiting, or policing for Linux iptables, implemented with high performance in mind.
:fire: Go bindings for the IPtables ipset http://ipset.netfilter.org userspace utility
IP leak prevention for OpenVPN
CSF with support for Docker