SSL redirecting to wrong site after installing using Let's Encrypt

edvanleeuwen

edvanleeuwen

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Joined
Nov 18, 2013
Messages
148
I have tried to using Let's Encrypt from within CustomBuild for a test server. The production server has SSL installed via Comodo. The certifcate is succesfully generated. SSL displays that Let's Encrypt is in use.

When I browse to the domain which has SSL has enabled, I am a able to access it via https. However, after some actions and/or a couple of minutes, the browser displays a message saying that it cannot validate the certificate.

Now a strange thing happens: when I ignore the browser message and proceed to the untrusted site, I get the contents of my production server. The URL displays the test server's address, so it's not a complete redirect, but some kind of URL substition.

Two questions:
  1. Does anybody have an idea what's causing this?
  2. Can I remove the SSL certificates issued using Let's Encrypt? And if so, how?

Thanks in advance.
 
Hello,

I guess your issue is related to SNI.

Do you have only one IP for all sites?
What OS version you use?
What is your OpenSSL version?
What webserver do you use?
 
Mentioned versions of the software works fine with SNI. What browser do you use?

Note some old browsers do not support SNI, and this seems to be your case.

You can check your site/server here at ssllabs.com, and you will see a list of browsers that does not support SNI.
 
I saw that I had a wrong configuration of my IP address. Your SNI suggestion was very helpfull. Thanks, zEitEr.
 
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