A persistent connection requires an HTTPS connection between the Agents and the desired server. Notification and Site Servers are required to have IIS 8.0 and higher. This is due to the need to use web sockets that were introduced in IIS 8. Server 2012 is needed to run IIS 8 as well. 

Please use the following steps to enable persistent connection in your environment:

NOTE: Ensure that WebSocket Protocol is enabled in Roles on the Notification Server and Site Servers you intend to use for persistent connections. 

• In Server Manager, add Roles and Features, and under Roles, enable WebSocket Protocol under Web Server > Application Development

1) First, using the Symantec Management Console, go to the "Notification Server Settings", enable "Persistent Connection" and then "Save changes".

2) Second, go to Settings>All Settings>Agents/Plug-ins>Symantec Management Agent>Symantec Management Agent Communication Profiles and choose the Notification Server.

Click the "Edit" link to the right of "Persistent connection..." and the "Persistent Connection Settings for Communication Profile" dialog box appears.

Check the box to "Enable persistent connection on Symantec Management Agents". This will set the default settings (shown in yellow), click "OK", and then "Save changes".

3) Third, go to Settings>Notification Server>Site Server Settings>Site Server Settings and click on "Global Site Server Settings". Then enable "Persistent Connection" and "Save changes".

Note:

Make sure the Task Server supports Websockets.

To enable support for the WebSocket Protocol, use the following steps:

1. 1. Open Server Manager.
   2. Under the Manage menu, click Add Roles and Features.
   3. Select Role-based or Feature-based Installation, and then click Next.
   4. Select the appropriate server, (your local server is selected by default), and then click Next.
   5. Expand Web Server (IIS) in the Roles tree, then expand Web Server, and then expand Application Development.
   6. Select WebSocket Protocol, and then click Next.
   7. If no additional features are needed, click Next.
   8. Click Install.
   9. When the installation completes, click Close to exit the wizard.
   10. Restart IIS services and Altiris Services on that Task Server.

Note:
Sometimes you may need to add these IIS Roles:

• • IIS-StaticContent
  • IIS-WebSockets

4) In order to monitor persistent connections from the Symantec Management Console, go to Reports>All Reports>Notification Server Management>Agent and click on "Agent Connection Status."

5) To verify the persistent connection for an individual client machine, open the Symantec Management Agent for that machine and look at the "Server Connection" (shown in yellow below).