Cloudflare Developers•12mo ago

Cloudflare Tunnel hangs up

I use Cloudflare to do developing directly over HTTPS urls. Today suddnely I started getting error as " Web server is down Error code 521 " Even when the port is running on the server. What to do in this case? I uninstalled, re-installed the server but no luck yet.

8 Replies

Cyb3r-Jak3•12mo ago

Are there any logs from the cloudflared service?

ashutoshOP•12mo ago

Dec 01 23:16:02 ubuntux cloudflared[2406137]: 2023-12-01T22:16:02Z INF Retrying connection in up to 1m4s connIndex=0 >
Dec 01 23:16:11 ubuntux cloudflared[2406137]: 2023-12-01T22:16:11Z WRN If this log occurs persistently, and cloudflar>
Dec 01 23:16:11 ubuntux cloudflared[2406137]: If you are using private routing to this Tunnel, then UDP (and Private >
Dec 01 23:16:11 ubuntux cloudflared[2406137]: 2023-12-01T22:16:11Z INF Switching to fallback protocol http2 connIndex>
Dec 01 23:16:12 ubuntux cloudflared[2406137]: 2023-12-01T22:16:12Z INF Registered tunnel connection connIndex=0 conne>

Dec 01 23:16:02 ubuntux cloudflared[2406137]: 2023-12-01T22:16:02Z INF Retrying connection in up to 1m4s connIndex=0 >
Dec 01 23:16:11 ubuntux cloudflared[2406137]: 2023-12-01T22:16:11Z WRN If this log occurs persistently, and cloudflar>
Dec 01 23:16:11 ubuntux cloudflared[2406137]: If you are using private routing to this Tunnel, then UDP (and Private >
Dec 01 23:16:11 ubuntux cloudflared[2406137]: 2023-12-01T22:16:11Z INF Switching to fallback protocol http2 connIndex>
Dec 01 23:16:12 ubuntux cloudflared[2406137]: 2023-12-01T22:16:12Z INF Registered tunnel connection connIndex=0 conne>

Cyb3r-Jak3•12mo ago

And what about when you try to visit the site? Does it show in cloudflared logs as well?

ashutoshOP•12mo ago

Now I have started receiving "Connection timed out"

Cyb3r-Jak3•12mo ago

In the cloudflared logs?

ashutoshOP•12mo ago

No, there are no additional cloudflared logs I don't want to create recreate tunnel as there a lot of domains connected.

Cyb3r-Jak3•12mo ago

Odd question but can you verify that the CNAME record is pointing at the correct tunnel id?

ashutoshOP•12mo ago

Also, I have checked about incoming and outgoing connect. Everything is working in that context. Already did, yes the CNAME record is correct. Somehow it automatically worked. It started working the same way it was stopped. (No changes at all)

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Cloudflare Tunnel hangs up