The iptables/xtables framework has been replaced by nftables. You should consider migrating now.

iptables is the userspace command line program used to configure the Linux packet filtering and NAT ruleset. It is targeted towards systems and networks administrators.

This package contains several different utilities, the most important ones:

iptables-nft, iptables-nft-save, iptables-nft-restore (nft-based version)

iptables-legacy, iptables-legacy-save, iptables-legacy-restore (legacy version)

ip6tables-nft, ip6tables-nft-save, ip6tables-nft-restore (nft-based version)

ip6tables-legacy, ip6tables-legacy-save, ip6tables-legacy-restore (legacy version)

arptables-nft, arptables-nft-save, arptables-nft-restore (nft-based version)

ebtables-nft, ebtables-nft-save, ebtables-nft-restore (nft-based version)