Operating System & Version
CentOS v7.9.2009
cPanel & WHM Version
WHM v104.0.6 (STANDARD)


May 8, 2019
cPanel Access Level
Root Administrator
I am getting an error in my overnight update: "All of the server’s DNS resolvers fail to respond". I currently have them set to Google's DNS, and and running the check_unreliable_resolvers --notify script gives me timeouts on every address. I have tried adding CloudFlare as a third, but it's obviously an issue with my server, not the resolvers. I've also noticed pings to external IP addresses report host unreachable.

However the server is online, all domains and websites functioning correctly and emails being sent, auto ssl being retrieved etc.

The only thing that has changed recently is the server IP address was migrated, and I've followed this through in WHM and all domain DNS records.

Where should I be looking to fix this?

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