Linux IP Firewalling Chains，一般称为ipchains，一种自由软件，在Linux内核2.2系列中运作，可用来作为封包过滤与防火墙功能之用。它被设计来取代旧有的ipfwadm，在Linux内核2.4系列中被iptables取代。

Linux IP Firewalling Chains, normally called ipchains, is free software to control the packet filter or firewall capabilities in the 2.2 series of Linux kernels. It superseded ipfwadm, but was replaced by iptables in the 2.4 series. Unlike iptables, ipchains is stateless.