WhatsUp Gold attempts to discover devices on your network using ping (ICMP) and by scanning for open TCP ports. Check to see if network devices respond to one or both of these request types before beginning discovery.

If a firewall exists between WhatsUp Gold and the devices to be discovered or if the Windows firewall is enabled on the computer where WhatsUp Gold is installed, make sure the appropriate ports are open to allow WhatsUp Gold to communicate via SNMP and WMI.