Error Code Portal
CloudflareCloudflare HTTP errorsError code

1013

Error 1013: HTTP hostname and TLS SNI hostname mismatch

Alternative forms: Error 1013

What does this code mean?

Code 1013 · An issue reported by Cloudflare HTTP errors.

Official explanation · Original text

This error indicates a mismatch between the HTTP hostname and the TLS SNI hostname. The hostname sent by the client or browser via Server Name Indication (SNI) does not match the request host header.

Troubleshooting and diagnostic links

First check that the document's product, version, and environment match your situation.

Source and terms of use

Error 1013: HTTP hostname and TLS SNI hostname mismatch ↗

Creator: Cloudflare, Inc. and contributors
License: Creative Commons Attribution 4.0 International
Checked on: 2026-11-12

Modifications: Selected introductory official description; Markdown stripped; original Korean product context added. Direct official error page retains the complete cause and resolution instructions.

Source details · Original licenses and notices