Hi Deano,
I too have been reading and recognise some of the suggestions you mention.
Before doing more I am pondering a couple of questions:
Why the original fix didn’t work. I wonder if I should persevere with getting that “work around” to work and if not, whether I should undo that fix before trying other solutions.
I also wonder if I should leave the backend set to iptables or revert to nftables. I was under the impression that even with the nftables backend set, iptable settings would still take precedence.
In my ignorance and given the complexity of the problem I wonder if I should try and go back to my original configuration before starting down a new path. How can I do that?