DNS Server unable to validate forwarders
My DNS was woring for about 4 years without a problem. I don't 'fiddle' with the servers, AD or anything. "If it ain't broken, don't fix it." A few weeks ago My Let's Encrypt Certificates stopped renewing. I have no idea why. I reached out to the Laet's Encrypt Forum and the informned my my DNS was not doing recursion and the DNS was the problem.
I checked. If I add a forwarder, it tries to validate and end with a timeout error. Even the PDC gives a timeout error. I downloaded Wireshark, but despite haveing been a Novell MCNE years ago. I'm long time retired and 83. I caputered UDP packets, but to be honest I don't have a clue.
Can anyone help me? I've never used wireshark and this problem is giving me whiter hair. I'm an author now. I write fiction novels, no longer a network engineer!