Windows – Better Tool Than Netstat

I've found a possible solution on a question which is on StackOverflow (maybe it should be migrated here?)

https://stackoverflow.com/a/12010927/196210

It leads to this solution, which is not totally fitting, but better than nothing:

netstat -anob | find ":80"

IIS doesn't allow you to start an HTTP (without an s) Site on port 443.

In your screenshot, in the 'Site Bindings' window, the type is http, which won't run.

Here what to do:

1. Create a self-signed certificate from IIS' wizard. (because IIS also doesn't allow you to open an HTTPS website without one) unless you use PowerShell command, which will end you up with the error of port 443 being in use.

2. 'Add a Website' with the binding being 'https' and choose your self-signed certificate. screenshot detailing everything

3. Site runs perfectly!

Extra content for reference:

I had the same error. Same everything as you OP. But considering that IIS doesn't allow you to open a site on port 443 without a certificate, how was I able to create a site? I was using PowerShell command:

New-WebSite -Name my-website -Port 443 -HostHeader my-website -PhysicalPath "$env:systemdrive\inetpub\wwwroot\my-website"

Which creates you a Site but it doesn't start automatically and if you attempt to start it via PowerShell, you will get this error:

Start-WebSite : Cannot create a file when that file already exists. (Exception from HRESULT: 0x800700B7)

or if you start it manually through the IIS' GUI, you will get that error being 443 is in use which is completely false in reality.