Lets Encrypt wildcard certificate renewal on acme challenge can not query dns from kay.ns.cloudflare.com and matt.ns.cloudflare.com. Timeout message appears on challenge logs. From another ip I can use without problems. I can ping and traceroute to dns ips but can not query port 53.
Yes. DirectAdmin control panel server. Renew jobs for letsencrypt SSL challange gives this timeout error. But nslookup command not responding too for my domains at cloudflare.