5xx Server Error
HTTP 511 Network Authentication Required
The client must authenticate to gain network access.
Check a URL's HTTP statusWhat 511 means
Used by captive portals on hotel, airport, or café Wi-Fi to prompt sign-in.
Common causes
- Connecting through a captive portal Wi-Fi network.
How to fix it
- Open a browser and complete the Wi-Fi sign-in page.
How to check a status code
Enter a URL in the HTTP Status Checker to see its status code, every redirect hop, and response time. For redirect-heavy pages, the Website Speed Test shows how much time redirects add.
FAQ
- What does HTTP 511 mean?
- 511 Network Authentication Required is a 5xx server error status code. The client must authenticate to gain network access.
- What causes a 511 error?
- Connecting through a captive portal Wi-Fi network.
- How do I fix HTTP 511?
- Open a browser and complete the Wi-Fi sign-in page.
Defined in RFC 6585.