Symptoms
The cPanel license fails to update, and a warning similar to the following may be found in the license_log log file or the output of cpkeyclt.
CONFIG_TEXT: warn [cpkeyclt] DNS query failure (auth.cpanel.net/A): Cpanel::Exception::DNS::ErrorResponse/(XID 3p42tn) DNS returned “SERVFAIL” (code 2) in response to the system’s query for “auth.cpanel.net”’s “A” records.
Cause
The issue occurs when the server is unable to query the auth*.cpanel.net A records for licensing. This commonly occurs due to a firewall blocking DNS queries.
Resolution
Ensure that your server can query the auth*.cpanel.net DNS records.
Note: These IPs may be subject to change.
# [root@server ~]cPs# dig A auth.cpanel.net +short
208.74.121.85
208.74.121.86
208.74.121.83
208.74.123.2
208.74.123.3
208.74.121.82
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