What ports are needed to get SNMP traffic working with devices and Spectrum?
The main consideration is that the Spectroserver needs to be able to ping the device(ICMP), and communicate with it via SNMP:
161 udp outbound and inbound (GET, GETNEXT, GETBULK, and SET)
162 udp inbound (TRAPS and INFORMS - I.e. Notifications)
All of the communication would be from the Spectroserver machine IP to the device.