Block or allow connections by country address blocks
download and convert ip block list
Easy to use tool to block unwanted network access.
Programmable completion code (bash) for ipset (netfilter.org)
ipset set listing wrapper script
Programmable completion code (bash) for ip[6]tables (netfilter.org)
Bash script to enable the firewall on startup of your Ubuntu server.
iptables generation tool for large linux networks
iptables web interface