My SSL certificate works on all modern browsers (IE 9+), but does not work on IE 8.

With modern browsers, the SSL certificate for my domain is used, but IE 8 wants to use the SSL certificate for my PaaS, resulting in a domain mismatch.

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How do I fix this? Is this an issue with my PaaS?

2 Answers 2


This is being caused by a problem with your server configuration for your SSL:

When I checked the SSL for your domain funraise.me using this SSL Installation Diagnostics Tool, it indicates the DNS resolves to IP address

When I used this tool to check the SSL for the IP address however, it listed the domain onmodulus.net (which redirects to modulus.io).

Also, when is typed into any browser (not just IE 8), the certificate error states that the certificate is issued to onmodulus.net

SSL's require a unique static IP for each domain they're issued to (with the exception of UCC SSL's, which can have more than one IP). Therefore, I would suggest contacting your provider (modulus.io) to review your server's SSL configuration.

  • i have an a record on their load balance, which is that IP address. let me see what they say. Jul 11, 2013 at 8:32
  • do you know why this only affects ie8, at least for me? Jul 11, 2013 at 8:32
  • It affected my IE 8 on Win XP too, which lacks SNI support, creating an HTTPS problem when IP's are shared (not dedicated). See this for more: Understanding Certificate Name Mismatches
    – dan
    Jul 11, 2013 at 8:43
  • 1
    It could be that onmodulus.net added your domain to their UCC SSL, which might require reissuing when they add domain names for this problem. See "Background of the problem" here: Server Name Indication
    – dan
    Jul 11, 2013 at 8:59

Normally IE compatibility is implemented via some special comments in your site header e.g.

<!--[if lt IE 9]><script src="ie8.js"></script><![endif]-->

If you have a discrepancy between IE8 and newer browsers, it might be worth checking to see if anything like this has crept into your html.

  • 2
    what does this have to do with ssl? Jul 11, 2013 at 5:35
  • I was wondering if there might be some external css or js being included from within a https request. I had something similar where an external reference to a google font (which was accessed via http) was being embedded in one of my sites htmls in a similar way.
    – steve cook
    Jul 12, 2013 at 7:37

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