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I migrated my SSL websites and certificates from Apache to Nginx and from that moment all Windows XP clients does not recognize the SSL certificate (it is a wildcard certificate issued by Trustico).

The old configuration on previous Apache servers was this:

SSLEngine on
SSLCertificateFile /etc/apache2/ssl/*_mysite.com.crt
SSLCertificateKeyFile /etc/apache2/ssl/*_mysite.com.key
SSLCertificateChainFile /etc/apache2/ssl/*_mysite.com.ca-bundle

And the new configuration on Nginx servers is this:

ssl on;
ssl_certificate /etc/nginx/ssl/*_mysite.com.crt
ssl_certificate_key /etc/nginx/ssl/*_mysite.com.key;
ssl_session_timeout 5m;
ssl_protocols SSLv3 TLSv1;
ssl_ciphers ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv3:+EXP;
ssl_prefer_server_ciphers on;

Nginx does not support the SSLCertificateChainFile parameter, so I read that I need to append the *_mysite.com.ca-bundle file below the *_mysite.com.crt one.

After this, other operating system than Windows XP are working good, but Windows XP is still recognizing a wrong certificate (it returns the "certificate error" message).

I cannot solve this problem, could you help me please?

  • You can't use Internet Explorer on Windows XP anymore, and nobody should be using Windows XP at all anyway! – Michael Hampton Jun 29 '15 at 15:14
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other operating system than Windows XP are working good, but Windows XP is still recognizing a wrong certificate..

In this case your setup requires Server Name Indication (SNI) and somewhere you have configured another certificate for clients not able to do SNI, like MSIE8 on XP.

  • Thank you very much Steffen! The problem was that I weren't seeing the second certificate on the same IP address! Bye! – Mat Jun 26 '15 at 20:18
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The problem is that IE8 and older on Windows XP does not support SNI. If you need to support users on Win XP/IE 8, each site needs its own dedicated IP address and corresponding SSL certificate.

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