NUT/UPS problem in bookworm on docker

[jannl]

Not sure if this is the right place for this question. Not even sure if it is Domoticz related.

Today I set my new pi 5 with bookworm live, most worked flawlessly with the latest docker containers.

However, NUT for the UPS connection on my Synology is not working. I always get access denied, I rellay tried a lot (DIfferent AI´ś), but no luck so far.

upsc from the host works fine, just not from within the comtainer.

I hope someone has a clue.

[jannl]

Solved, different use of iptables (nftables) on docker bookworm. A lot of searching, going back to legacy iptables and adding e firewall rule for de NUT port did te trick.