Am 2021-02-24 13:01, schrieb Steve Litt:
> Hi all,
>
> I'm now at the stage where I need a firewall on my Devuan VM guest, and
> I don't know how to do it. I have the iptables package installed, and
> /usr/sbin/iptables is a command, but I have no idea where to go from
> there. Is there a file that iptables uses to define which ports are
> blocked?
>
> I'm used to iptables being a daemon, and that seems not to be the case
> in Devuan.

Maybe ufw is what you want.
https://ubuntu.com/server/docs/security-firewall