Ubuntu server can't connect to some sites when qbittorrent is running (sh.itjust.works)

submitted 10 months ago* (last edited 10 months ago) by ZeroCooler@sh.itjust.works to c/piracy@lemmy.dbzer0.com

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Hey all, ran into a weird issue with my Ubuntu server running qbittorrent-nox I can't seem to figure out.

When Qbittorrent is running, I can't load some sites. How I discovered this was Jackett was failing tests to my trackers. Sometimes all trackers would fail, other times only a couple would.

From the server I ran a curl to the tracker URLs and confirmed they were not loading.

Pcap shows the TLS hello go out, but no response from the server.

Once I kill the qbittorrent process, everything works.

Wondering if anyone has any ideas or has seen this issue before.

Things I've tried:

Disabled ipv6
Changed Qbit UI port
Paused Torrents
re-installed openssl
rebooted about 150 times and counting

Qbit version is 4.5.5 Ubuntu 22.04.3 headless running on Esxi

Appreciate any ideas!

Edit: So after much frustration and some other weird things, restored to a previous snapshot and the issue seems to have resolved. Appreciate all the troubleshooting ideas and responses!

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[-] Morgikan@lemm.ee 2 points 10 months ago

Sounds like you've already maybe ruled out some things, but as far as the port exhaustion question people had, you could prove that with "netstat -s" to see total number of active connections. You might also look in the qbittorrent log file for anything stands out. You might also check your router to make sure you're not doing some weird port forward or something of that nature.