PF is also from 2001. But its roots go further back, I once used a very PF-like syntax on a Unix firewall from 1997. I forget which type of Unix it was, maybe Solaris.
Either way, I don't think there is any defense for the strange syntax of IPtables, the chains, the tables. And that's coming from a person who transitioned fully from BSD to Linux 15 years ago, and has designed commercial solutions using IPtables and ipset.
Either way, I don't think there is any defense for the strange syntax of IPtables, the chains, the tables. And that's coming from a person who transitioned fully from BSD to Linux 15 years ago, and has designed commercial solutions using IPtables and ipset.