Discovering Your Enterprise › Discovering Your Network Devices Continuously in Real-time Mode › Discovery and Firewalls

Discovery and Firewalls

Discovery depends on SNMP for some of its classifications. Firewalls that have the default SNMP ports disabled will prevent some computers from being classified properly if they are located behind such a setup. Possible workarounds would be to use Continuous Discovery by placing a Continuous Discovery agent behind the firewall and opening the CAM port for communication across the firewall.

Discovery also uses the default ICMP ports on the agent computer to find devices. Other discovery mechanisms such as HTTP and port scans also require that ports be open if run from behind a firewall, although we do not recommend this approach.