Errors in Apache SSL Logs - Re-negotiation handshake failed: Not accepted by client!?

Server
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Hi, I’m running into this error with Let’s Encrypt (default settings, Apache 2):

AH02261: Re-negotiation handshake failed: Not accepted by client!?

What does this mean, and does anyone know how to fix the error? I’m starting to think this is a problem with the client (not with the server), but is there a way to handle this better than just failing? Is there a way to prevent this error filling up my logs? Can I redirect the client to a “Help” page?

Any help is greatly appreciated, thanks!

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Hi @mgussekloo

Have a read of this:https://wiki.apache.org/httpd/DebuggingSSLProblems

Without your domain we can’t run a check and advise what could be causing these issues.

I would suggest using SSLLabs to do an inspection of your site.

TLS handshakes often fail because the client and server cannot agree on an algorithm to use.

Andrei

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