npub19lt4284mghqxekzm6n5njxurnxrxhqhrva2leusdsuu5ja5jeycq66qfjk (npub19lt…qfjk) I would tcpdump on the router to see if traffic goes toward the desired system.
And if yes, tcpdump on home system to see if traffic arrives there.
to start with
and if traffic arrives what reply is given.