Check if the GUP is recognized as a GUP by checking if the SharedUpdates folder is in the client's SEP root folder (e.g., C:\Program Files (x86)\Symantec\ Symantec Endpoint Protection\SharedUpdates). If it is a 32-bit operating system then it will be located in the Program Files\Symantec\Symantec Endpoint Protection\SharedUpdates folder instead.
Is the designated GUP configured as a GUP and listening on port 2967 (default port)? Use netstat to check the connection state table.
Are the SEP clients that are requesting content from a GUP configured to use a GUP as their Liveupdate source? Check the following:
If this key is set to 1, the client uses an internal LiveUpdate server or Symantec LiveUpdate directly instead of a GUP.
■ UseManagementServer
If this key is set to 1, the client uses the management server for updates directly.
■ UseMasterClient
If this key is set to 1, the client uses a group update provider
If the client is not set to use the GUP (UseMasterClient = 1) then review the Liveupdate policy for the respective client group and set it to use a GUP as needed.