Endpoint Manager port usage
When using Endpoint Manager in an environment that includes firewalls (or routers that filter traffic), information on which ports need to be opened at the firewalls is crucial.
The following document on the Ivanti User Community identifies the ports that Endpoint Manager uses on your core server and managed devices.
IMPORTANT: Typically, during the installation process Endpoint Manager setup and agent configuration will configure these ports automatically in the Windows Firewall. However, if you're using a different firewall product, you will need to configure the ports manually.