Cloudflare Developers•3mo ago

Cloudflare Tunnel Timeouts and QUIC Protocol Connection Issues

I'm experiencing persistent timeouts and connection issues with my Cloudflare tunnels across all endpoints. The error message displayed is: “upstream->downstream copy: read tcp [::1]:36358->[::1]:8443: use of closed network connection.” It seems that the issue is related to the QUIC protocol, as there are disruptions in the connection between upstream and downstream, causing the closed network connection error. Despite troubleshooting, including checking the tunnel configuration, restarting the tunnel, and testing two different SSL certificates (self-signed and Let's Encrypt), the problem persists. I also verified DNS settings, but the issue continues.

18 Replies

PatrykOP•3mo ago

It looks like there's a 50% chance of a timeout. The problem has been occurring for over 3 days And the problems began suddenly without any changes in the configuration In addition, the occurrence of this problem is very unpredictable. Sometimes it times out for 3 hours straight and then works fine for 2 hours. I have already contacted the hosting provider, who even deactivated the anti-DDoS protection, but even that did not help

PatrykOP•3mo ago

PatrykOP•3mo ago

I also noticed that sometimes Cloudflared uses 70% of the CPU on Ubuntu.

PatrykOP•3mo ago

{
  "ingressRule": 5,
  "error": "Incoming request ended abruptly: context canceled",
  "connIndex": 1,
  "originService": "http://45.11.229.XX:3023"
}

{
  "ingressRule": 5,
  "error": "Incoming request ended abruptly: context canceled",
  "connIndex": 1,
  "originService": "http://45.11.229.XX:3023"
}

PatrykOP•3mo ago

Can someone help?

asuffield•3mo ago

what plan is your zone on?

PatrykOP•3mo ago

Free Hello?

Alula•3mo ago

I think something's wrong with Warsaw datacenter I've been experiencing the same issue as a regular user on a Discord client on a macOS host specifically, had the issue happen on Firefox, Chrome and the desktop app at the same time, symptoms the same - QUIC connections just die and it happens particularly often on discord.com and started 2-3 days ago

Alula•3mo ago

my friend also had this exact issue

PatrykOP•3mo ago

The thing is, this server is in Germany and connects to Frankfurt data centers. And since I don't have Pro, I'm using Frankfurt all the time. But what's funnier is that the VPS connecting from Wrocław to Polish data centers works without any issues And what's even stranger is that in my case, the problem started suddenly without any warning signs

Alula•3mo ago

same here I think it was quietly fixed today btw

PatrykOP•3mo ago

I tried disabling http3 and quic from the Cloudflare dashboard, but it didn't help I don't know. I can't check it anymore because the problem lasted for a long time, and I’ve moved most of the services away from Cloudflare Tunnels.

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Cloudflare Tunnel Timeouts and QUIC Protocol Connection Issues

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