After configuring the SNMP service according to the NFA watchdog setup documentation, it is still not functioning.
In the watchdog logs we are getting the following error:
System.Net.WebException: The request failed with HTTP status 405: Method Not Allowed.
at WatchdogMain.DeviceManager.CPUs..ctor(SnmpProfile profile, IPAddress address)
This issue is due to a misconfiguration of the ProxyService and .NET in IIS.