Which ports should be open if my cPanel server is behind a firewall?
You must open the following ports to run cPanel behind a firewall: FTP Port Service Details 20 FTP TCP inbound/outbound 21 FTP TCP/UDP inbound/outbound Server administration and maintenance Port Service Details 22 SSH TCP inbound 37 rdate TCP outbound Email Port Service Details 25 SMTP TCP inbound/outbound 26 SMTP…