Unable to access websites ports already in use error message

I have a Windows 2003 server with IIS installed. I have configured two different websites, one for 'windows authentication' and naother one for Anonymous access. When i try to start website with 'Windows Authentication' I am able to start the site, but when i try to start Anonymous site, it says message Port is already in use. Either i tried starting Anonymous site, i was able to, but when i tried to start Windows authentication site, it says the same error message. All the configuration are as per standard and i have two different ip's for sites. Both are SSL enabled.

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  1. I have come accross this issue on Windows 2003 server. This error you get when u use different ip's configuring for same SSL port (ex. 443). You need to manually assign the SSL port number to each ip in websites.
    Right click on 'websites' and click on 'properties', In 'Website' tab click on 'Advanced' button near IP address and click on 'Edit' button under 'Multiple SSL identities for this Website' and select the website ip. By default it will in 'Default'.
    Once you change to IP of the site then you would be able to start the website.

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