Symptoms
When upcp runs, errors similar to the following appear in the cPanel update log /var/cpanel/updatelogs/last:
CONFIG_TEXT: [2022-09-13 05:26:12 +0200] E [/usr/local/cpanel/scripts/rdate] Can't connect to rdate.cpanel.net:37 Connection refused
[2022-09-13 05:26:12 +0200] E [/usr/local/cpanel/scripts/rdate] The “/usr/local/cpanel/scripts/rdate” command (process 1430475) reported error number 111 when it ended.
Cause
The rdate script adjusts the system clock on servers not running an NTP daemon. The errors occur when the server is unable to contact rdate.cpanel.net on TCP port 37. This can occur if outbound TCP port 37 is blocked.
Resolution
If the server is unable to communicate over port 37, outbound TCP port 37 will have to be opened in the firewall.
Additional Resources
What ports should I open in my network firewall?
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