I would run the SNMPwalk.exe program in your Orion installation folder. Run Wireshark on the Orion server and capture the traffic. Is the SNMP reply even coming back? Any data in it? Any authentication or encryption failures (if SNMPv3)? Check logs of device you're trying to monitor and validate that the SNMP authentication and encryption were successful (if SNMPv3)
There are some examples here:
You could also SNMPwalk from the monitored device using the expected credentials. If it doesn't work locally, doing it over the network won't be possible either.
actually tried all. I also manually install agent. I also used some 3rd party tools but no reply via snmp or wmi. all I got is icmp reply (with agent and without agent both)
I am having the same issue. We run SNMP to detect servers. We have server behind the DMZ also. i have added community string to those server behind the DMZ (Click Link). I have opened ports 17777 and 17778 bi-directional, able to ping those servers from Orion NPM server and vice-versa, ran wireshark with no packets found, ran SNMPWalk which timed out with nothing found.
Although I was able to create the node using ICMP only, I was still unable to test it without it failing. ANY SUGGESTIONS WOULD HELP.
despite allowing "all to all" in firewall. I guess that there is still something in firewall that is blocking SNMP.
I also tried by allowing all SNMP related ports but issue still there