Depending on the product that you are using, you may need to open an exception through your firewall.  Below are the hostnames and ports required.

The ICE software communicates with the host server for license activation and for uploading scan data.

Hostname: idm.printaudit.com or fm.printaudit.com
Port:  443
Optional Port: 80  (used by the ICE Update service to automatically determine if a new version of ICE is available.

User Management/Print Audit 6

UM and Print Audit 6 communicate with an external licensing server.
Hostname: licensing.printaudit.com
Port: 443