7.41. ( IPTABLES vs. IPCHAINS vs. IPFWADM ) - Why do the 2.4.x, 2.2.x, and 2.0.x kernels use different firewall systems?

IPTABLES supports the following features that IPCHAINS and IPFWADM doesn't:

IPCHAINS supports the following features that IPFWADM doesn't: