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Cannot start IIS in port 443

ARMH 36 Reputation points
Aug 21, 2022, 11:18 AM

Cannot start IIS port 443, getting following error as in the screenshot

233166-port-443-issue.jpg

following screenshot is the site binding, Digicert SSL certificate...

233234-port-443-setting.jpg

Internet Information Services
Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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  1. Andreas Baumgarten 112.4K Reputation points MVP
    Aug 21, 2022, 11:47 AM

    Hi @ARMH ,

    it might be another service is already listening on port 443.

    You can verify this by running this command in a cmd:

    netstat -aon | find ":443"  
    

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    (If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)

    Regards
    Andreas Baumgarten

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  2. Limitless Technology 39,731 Reputation points
    Aug 22, 2022, 2:40 PM

    Hello there,

    IIS doesn't allow you to open a site on port 443 without a certificate. Make sure to have the openssl installed on your server machine.

    openssl s_client -connect loalhost:443
    GET / HTTP/1.1
    Host: localhost

    Type enter twice and you will get the HTTP GET Response and you can find out the webpage listing on your local machine. Let me know if this helps.

    I hope this information helps. If you have any questions please let me know and I will be glad to help you out.

    -----------------------------------------------------------------------------------------------------------------------------------------------

    --If the reply is helpful, please Upvote and Accept it as an answer--

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