Create a new Management Server List and add the External ip add
To change the port that clients use to communicate with the Manager, create a Management Server List that has the correct ports configured and assign that policy to an install package.
In the SEPM console, click Policies
Under View Policies, click Policy Components
In the list that appears, click Management server lists
Under Tasks, click Add a Management server list
Give the new Management Server List a name (and description if desired)
Choose HTTP or HTTPS protocol
In Management Servers, on the right, click Add, slide over and choose New Server
Enter the SEPM IP address.
Check Customize HTTP port or Customize HTTPS port and enter a port value.
NOTE: if using TCP port 8014 in IIS as part of a default installation of MR3 or higher, be sure to enter 8014 here.
You can add additional SEPM servers to this list and set server priorities as well for failove