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I got problems with my custom domain setup on readthedocs. Suddenly custom domain (https://docs.joinrpg.ru) stops working with SSL_ERROR_NO_CYPHER_OVERLAP.

Variois SSL checkers report that they "Failed to communicate with the secure server".

Readthedocs panel say that SSL certificate status: restricted_name_failure: Use of one or more domains on the certificate is restricted.

There was partial block by local authorities of readthedocs in Russia, but it (a) was on DNS-level (b)seems to be solved now, and (c) problem seems to reproduce outside russia.

What can I do to diagnose issue?

Leotsarev
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  • Something related to networking and regulation (Russia related assets are under a lot of sanctions at this moment) does not fall under Stack Overflow – Lex Li Apr 27 '22 at 12:56
  • Seems not related to network and regulation. Opened bug against readthedocs https://github.com/readthedocs/readthedocs.org/issues/9149 – Leotsarev Apr 27 '22 at 15:20

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It was a bug with Cloudflare doesn't allow to issue certificates for "ru" domain zone. It have been switched to Let's encrypt thanks to readthedocs team.

https://github.com/readthedocs/readthedocs.org/issues/9149

Leotsarev
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