'The Port 443 Being Used By Another Application' Error During Installation Of Orchestrator

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How to fix "The port 443 being used by another application" issue during installation of Orchestrator ?

Issue Description:
By default, port 443 is used by the Orchestrator web application to communicate over HTTPS. In case port 443 is not open or is being used already by another application, Orchestrator installation will fail.

To determine the status of the port, run from the command line with elevated rights the following command:

netstat -an | find "443"

Resolution:
  1. Try to telnet from some other machine to the server where the Orchestrator will be installed by running telnet host port to see if the connection is refused, accepted, or timeouts.
  • Connection refused means that nothing is running on that port
  • Accepted means that something is running on that port
  • Timeout means that a firewall is blocking access
  1. In case 'telnet' is not recognized as an internal or external command, operable program or batch file. To solve this, just enable it: Click Start > Control Panel > Programs > Turn Windows Features on or off. In the list, scroll down to select Telnet Client and click OK.
  2. Using the PowerShell command, find if the 443 port is listening or not.
Get-NetTCPConnection -RemotePort 443
  1. If port 443 is used by another application, choose a different HTTPS port for Orchestrator such as 8443, 9443.
  2. Once Orchestrator is installed with that port, ensure it is listening
  3. In case the port is blocked by the firewall, change the firewall settings and allow the port with the help of the IT team.