[PATCH] wg-quick: linux: add support for nft and prefer it

[Jason A. Donenfeld]

On Tue, Dec 10, 2019 at 5:52 PM Jordan Glover
<Golden_Miller83 at protonmail.ch> wrote:
>
> On Tuesday, December 10, 2019 3:48 PM, Jason A. Donenfeld <Jason at zx2c4.com> wrote:
>
> > If nft(8) is installed, use it. These rules should be identical to the
> > iptables-restore(8) ones, with the advantage that cleanup is easy
> > because we use custom table names.
> >
>
> I wonder if nft should be used only if iptables isn't installed instead.
> Nowadays iptables has nft backend which I believe is default and will
> translate iptables rules to nft automatically. On my system iptables rules
> from wg-quck are already shown in "nft list ruleset".
>
> I'm not sure if this work in reverse - are nft rules automatically translated
> to iptables and shown in iptables-save? If not then using iptables of available
> seems more versatile for the job.

iptables rules and nftables rules can co-exist just fine, without any
translation needed. Indeed if your iptables is symlinked to
iptables-nft, then you'll insert nftables rules when you try to insert
iptables rules, but it really doesn't matter much either way (AFAIK).
I figured I'd prefer nftables over iptables if available because I
presume, without any metrics, that nftables is probably faster and
slicker or something.