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Parabola GNU/Linux-libre: iptables-legacy

From Arch:

The old iptables-nft package name is replaced by iptables, and the
legacy backend is available as iptables-legacy.

When switching packages (among iptables-nft, iptables, iptables-legacy),
check for .pacsave files in /etc/iptables/ and restore your rules if needed:

  • /etc/iptables/iptables.rules.pacsave
  • /etc/iptables/ip6tables.rules.pacsave

Most setups should work unchanged, but users relying on uncommon xtables
extensions or legacy-only behavior should test carefully and use
iptables-legacy if required.

Source: Planet GNU