Ubuntu 20.04 and secure connections

Plex Media Server Desktops & Laptops
1

Server Version#: 1.20.1.3252
Player Version#: web player

Hello,

After uprgading to ubuntu 20.04, secure connections with https://app.plex.tv/desktop stopped working.
I suspect the ubuntu integrated resolver systemd-resolved to mess with domain rebinding.
I allowed domain rebinding for plex.direct on my router (dnsmasq), it used to work like a charm.

I don’t know what I can do next to debug why it isn’t working ?

2

I tried with Firefox, edge and chrome : same results.
The Firefox inspector says “a security error prevented the resource from being loaded” on requests to 192-168-20-200.f9fe81ca47ba4428a17266059507cb25.plex.direct.

I tired to resolve this domain from the server and the client : both work, returning the address 192.168.20.200.

3

Restart PMS
Let it sit for about a minute then inspect Plex Media Server.log

If you find a 404 error regarding the certificate, join us here.

4

I don’t have 404 errors, but I have those which seems related to certificates :
Oct 05, 2020 16:08:17.871 [0x7f682ffff700] DEBUG - CERT: incomplete TLS handshake: sslv3 alert certificate revoked

I did some digging, I got some 404 a bit earlier - about the time I did the upgrade :

root@nas:/etc# grep 404 "/var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Logs/Plex Media Server.log"
Oct 05, 2020 14:26:13.239 [0x7f6835506700] DEBUG - HTTP 404 response from POST https://plex.tv/devices/691580f8467880cefe802adb0de861361c0b67e2/certificate?version=3&X-Plex-Token=xxxxxxxxxxxxxxxxxxxx
Oct 05, 2020 14:26:13.240 [0x7f6835506700] ERROR - CERT: Could not fetch certificate from the cloud: 404
Oct 05, 2020 14:26:16.846 [0x7f682f7fe700] DEBUG - HTTP 404 response from POST https://plex.tv/devices/691580f8467880cefe802adb0de861361c0b67e2/certificate?version=3&X-Plex-Token=xxxxxxxxxxxxxxxxxxxx
Oct 05, 2020 14:26:16.847 [0x7f682f7fe700] ERROR - CERT: Could not fetch certificate from the cloud: 404
5

After a proper restart (previous did not work), I can confirm the 404 :

root@nas:/etc# grep -A1 "HTTP 404" "/var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Logs/Plex Media Server.log"
Oct 05, 2020 16:23:43.197 [0x7f4d225ba700] DEBUG - HTTP 404 response from POST https://plex.tv/devices/691580f8467880cefe802adb0de861361c0b67e2/certificate?version=3&X-Plex-Token=xxxxxxxxxxxxxxxxxxxx
Oct 05, 2020 16:23:43.198 [0x7f4d225ba700] ERROR - CERT: Could not fetch certificate from the cloud: 404
--
Oct 05, 2020 16:23:46.750 [0x7f4d06ffd700] DEBUG - HTTP 404 response from POST https://plex.tv/devices/691580f8467880cefe802adb0de861361c0b67e2/certificate?version=3&X-Plex-Token=xxxxxxxxxxxxxxxxxxxx
Oct 05, 2020 16:23:46.751 [0x7f4d06ffd700] ERROR - CERT: Could not fetch certificate from the cloud: 404
6

Join us in the other thread please.

Closing this in favor of the thread (sanity and efficiency in handling)