Change console-to-application server communication port

If the ePO - On-prem console-to-application server communication port is in use by another application, follow these steps to specify a different port.

Back up your registry and understand the restore process. For more information, see the Microsoft documentation.
Make sure that you run only .reg files that are not confirmed to be genuine registry import files.

Important
This topic contains information about opening or modifying the registry. This information is intended for use by network and system administrators only. Registry modifications are irreversible and can cause system failure if done incorrectly.

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Stop the ePO - On-prem services:
1. Close all ePO - On-prem consoles.
2. Click Start → Run, type services.msc, then click OK.
3. Right-click each of these services and select Stop:
  - Trellix ePolicy Orchestrator Application Server
  - Trellix ePolicy Orchestrator Event Parser
  - Trellix ePolicy Orchestrator Server
In the registry editor, select this key:
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{53B73DFD-AFBE-4715-88A1-777FE404B6AF}]
In the right pane, double-click TomcatSecurePort.SQL and change the value data to reflect the required port number (default is 8443).
Open a text editor and paste this line into a blank document:
```
UPDATE EPOServerInfo SET rmdSecureHttpPort =8443
```
Change 8443 to the new port number.
Name the file TomcatSecurePort.sql and save it to a temporary location on the SQL Server.
Use Microsoft SQL Server Management Studio to install the TomcatSecurePort.SQL file that you created.
1. Click Start → All Programs → Microsoft SQL Server Management Studio.
2. On the Connect to Server dialog box, click Connect.
3. Expand Databases, then select ePO database.
4. From the toolbar, select New Query.
5. Click File → Open → File..., then browse to the TomcatSecurePort.sql file.
6. Select the file, click Open → Execute.
In Windows Explorer, browse to this directory:
\Program Files (x86)\Trellix\ePO - On-prem\Server\conf\
In Notepad, open Server.xml and replace all entries for port 8443 with the new port number.
Click Start → Run, type services.msc, then click OK.
Right-click each of these services and select Start:
- Trellix ePolicy Orchestrator Application Server
- Trellix ePolicy Orchestrator Event Parser
- Trellix ePolicy Orchestrator Server