A firewall for humans.
Free UTM appliance: firewall, VPN, WAF and antivirus in one ISO.
Anti Spam SMTP Gateway
iptables script in only one file
Share a VPN connection with VMs or containers
OpenBSD based firewall distribution
An iptables IPv4 firewall and traffic shaping program
Bash script to enable the firewall on startup of your Ubuntu server.
blocklists for openbsd,freebsd,linux,iptables,bsd pf,pf,ipfilter
ipset set listing wrapper script
A powerful network security tool, easy, safe and totally free.
Programmable completion code (bash) for ip[6]tables (netfilter.org)
shell program to automatically configure freebsd as a firewall
Block or allow connections by country address blocks
Open source voucher management / hotspot system
Linux firewall distribution geared towards home and SOHO users.
bash programmable completion for conntrack-tools (netfilter.org)
Programmable completion code (bash) for ipset (netfilter.org)
High interaction honeypot solution for Linux based systems