What Is HTTP 511 Network Authentication Required?
HTTP 511 Network Authentication Required explained, and what it means when you see it in CI/CD and deployments.
HTTP 511 means the client must authenticate to gain network access.
What it means
A 511 is returned by captive portals (hotel/airport WiFi). It is not from the target server but from a network intercepting traffic.
When you see it in CI/CD
A 511 in CI usually means a self-hosted runner is behind a captive portal or proxy that requires sign-in. Configure the proxy or move to a properly networked runner.
Key takeaways
- 511 means network auth required.
- Comes from a captive portal/proxy.
- Configure the runner network.