Something is super messed up with TrueNAS as of a few days ago.
It all started when I noticed Plex issues. Then I saw my app catalog wouldn’t update, then I couldn’t get updates to load:
TimeoutError(): Automatic update check failed. Please check system network settings.
I can ping Google.com, but it uses IPv6. Pinging GitHub.com (app catalog), it sits there doing nothing. That uses IPv4. I did some trace routing, and all but the first hop are * * *. Doing the exact same commands on my Windows machine, no issue.
I use UniFi on my network, but I don’t have-- I just figured it out (even though I spent all night trying…).
The other day, I misclicked when blocking some malicious threat actor in UniFi, and it ended up creating firewall rules to block everything to and from my NAS instead of just that IP.
I found both of those firewall rules and removed them.
The reason I could ping Google was because it used IPv6. Apparently, the blocking was only for IPv4. That’s why some things worked and others did not even though DNS responses came back fine.
Leaving this here in case it helps someone in the future.