# Predefined Services Edit

You can change the session timeout value for a pre-defined service.

### To Modify a Pre-Defined Service

1. Select the session timeout for the service:

Use protocol default: The default timeout for TCP connections is 30 minutes. The default timeout for UDP connections is 1 minute.

Never: The session does not timeout.

Custom: Enter a timeout value, in minutes. The maximum timeout for TCP and UDP sessions is 40 minutes.

2. Click OK to save your changes and return to the Predefined Services page.