Fixing Cloudflare 523 errors

hello@nietaki.com (nietaki) — Wed, 25 Feb 2026 12:00:00 +0000

For some context: Recently I’ve been sharpening my Kubernetes skills by setting up a small 6 node k3s cluster at home. The place I currently live doesn’t have a public IP address, so I chose to set up a Cloudflare Tunnel to expose services to the internet.

I chose to have the cloudflared daemon running on the host machines and the overall setup quick and pain-free. The whole thing seemed to work well, but I noticed that over time (within hours) the tunneled services would start responding more slowly and eventually Cloudflare would display 523 errors.

Cloudflare on almost done

Fixing Cloudflare 523 errors