To change the OfficeScan client/agent communication port:

On the OfficeScan Server

1. Stop the OfficeScan Master Service.
   1. Click Start and select Run.
   2. Type "services.msc".
   3. Right-click the OfficeScan Master Service.
   4. Click Stop.
2. Launch Windows Explorer and go to the <Officescan Server Installation Directory>\Trend Micro\OfficeScan\PCCSRV folder.
3. Create a backup a copy of ofcscan.ini file.
4. Open the ofcscan.ini file using a text editor such as Notepad.
5. Under [INI_SERVER_SECTION], note the values of the following:

   Master_DomainName
   Master_DomainPort

6. Under [INI_CLIENT_SECTION], replace the value of the "Client_LocalServer_Port" with your desired Client communication port number.
7. Restart the OfficeScan Master Service.

On the OfficeScan Client/Agent Machine

To change the agent communication port, please use the IPXfer utility by following the instructions found in the following article: Manually transferring or re-establishing communication between OfficeScan/Apex One agents and server using the IPXfer Utility.