I am trying to add a DNS sensor to one of my DNS servers but keep getting a No Response PE002 error code. I have verified that the DNS service is running and it is serving dns requests correctly. My ping sensor is working fine. I am able to telnet to the server on port 53.
I have a total of three DNS servers. Two in my local office and a third (the one in question) is in a remote office connect via vpn. The dns sensors on the two in my local office are working fine, it's just the remote one throwing this error. Hoping someone can point me in the right direction to get this resolved.