CyberPanel follows deny all rules except for the ports opened by default, you can see default opened ports at: Server > Security > Firewall
As I've mentioned above, CyberPanel follows deny all rules, so if you want to allow any port you can add from Server > Security > Firewall.
This will add rule and reload firewall.
Just click on the cross on right side of the rule, this will delete the rule and reload firewall.