SharePoint 2010: Changing Central Administration Site Port
Introduction
In some scenarios changing the Central Administration site port is required. You can use the following methods to accomplish this.
Use the SharePoint Product Configuration Wizard
When you run the SharePoint Product Configuration Wizard from Psconfigui.exe, you can specify the port to which the Central Administration port is bound.
Using Stsadm Commands
You can use STSADM with the setadminport operation to modify the port to which the Central Administration site is bound.
Stsadm –o setadminport –port <PortNumber>
<PortNumber> is the available port number you can specify
Using Windows PowerShell
You can use Set-SPCentralAdministration cmdlet with the –Port parameter to modify the Central administration web site port
For example, to change the port number to 7443:
Set-SPCentralAdministration –Port 7443
Note: Port number cannot be changed from the Central Administration web site itself