Lately I'm getting UDP timeouts in the connection test, though TCP works fine. This is without any config changes at my end. But I've tried:
* Recreating the forwarding rule in my router.
* Recreating it as separate TCP and UDP rules instead of one combined rule.
* Turning off Windows Firewall.
* Turning off Avast! personal antivirus.
None affected it: TCP forwarding working, UDP no response.
I seem to be able to search and download ok with it in this state, but I still don't like there being a caution light on my dashboard even if things seem to be working fine otherwise.
What else could be influencing UDP reachability, besides AV, firewall, and router?