"
Ran into this problem on one out of two routers, same error messages as the original poster. Noticed the working router had 8.8.8.8 for DNS, while the non-working router had the IP of an internal network DNS server (that is running a rather old version of a resolver). Added 8.8.8.8 (and 1.1.1.1) to the list of DNS servers on the non-working router, retried the certificate renewal, and it now it worked!
My guess is that some where between the acme and curl scripts, they are doing some sort of DNS query that not all DNS servers support. In my case, when the internal DNS server failed to provide the desired answer, it retried with 8.8.8.8 which worked, and all was happy. Hence, try different DNS servers, it worked for me. :)
My guess is that some where between the acme and curl scripts, they are doing some sort of DNS query that not all DNS servers support. In my case, when the internal DNS server failed to provide the desired answer, it retried with 8.8.8.8 which worked, and all was happy. Hence, try different DNS servers, it worked for me. :)
