Discovery port scanning action Perform all troubleshooting from the MID Server host for a direct comparison about how the MID Server is gathering the information. About this task Validate Network Connectivity Run this test to validate network connectivity and confirm your port scanning results. Procedure Use PING to test connectivity with the host on the network (ping<host IP>). If no ping response is returned, use TRACEROUTE to see where traffic might be stopped. (traceroute<host>) Use TELNET to connect to any of the TCP ports (telnet<host> <port>) Use an SNMP scanning tool to determine if a potential network device is responsive. The most likely issues around network connectivity are: Routing: Perhaps the MID Server host does not have network access to the IP ranges you are attempting to discover. Firewalls: Physical: Firewalls that protect a large environment such as the Data Center. Logical: Software firewalls that protect an individual computer. Access Control Lists (ACL): ACLs are an IP based list on SNMP network devices that allows communication to a particular target. Resolve these issues with your network teams to better understand your topology. Deploy additional MID Servers if necessary to help keep your network secure. Configure access from your existing MID Server host to networking components. What Comes Next? If you did not detect any issues during port scanning, proceed to the Classification stage.