If you suddenly received the following error during Cpanel licensing or suddenly, it is because port 37 is blocked via TCP and UDP protocols in your firewall settings (it may also be a hardware firewall and/or paid firewall service).
rdate: timeout for rdate.cpanel.net
When you allow port 37 in your firewall settings, run the command below and test the output.
rdate -s rdate.cpanel.net
We run the licensing and control command below again.
/usr/local/cpanel/cpkeyclt
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