I am evaluating NTM for my organization, using it for network devices, specifically Cisco. When I attempt to implement a new scan, using SNMPv3 credentials, I get a failed test. I have all information input into Edit SNMP Credential. I have verified it against the configuration of the device I am testing against. On a side note, we are currently using SW Orion and have no issues with SNMP with it.
The device where NTM is installed, its IP address is in a range allowed by an ACL on the Cisco devices. No firewalls in the path are blocking the traffic.
There is something interesting on a Wireshark capture, from the NTM device to the network device, fields indicate that information is missing:
The values are stored and are not missing in the Edit SNMP Credential window.