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Imitate TCP Wrapper

archlinux has chosen to remove TCP wrappers from it’s core packages a couple of years now.

You can read this all about here.

This is how to imitate the tcp wrapper (by the way Wietse Venema rocks! ) functionality with iptables and source range.

iptables -A INPUT -p tcp --dport 22 -m iprange --src-range -j ACCEPT
iptables -A INPUT -p tcp --dport 22 -j DROP