I needed to reinstall the WSUS today and it installed itself at the default website (80) instead of the custom one (8530) that I used before. So I needed to change the port in which WSUS listens. That’s what I did:
On the WSUS Server, open a command promp, go under “c:\program fils\update services\tools” execute this command wsusutil usecustomwebsite true
This command will create the WSUS custom web site with old content and also the 8530 port.