I have CentOS 7.3.1611 installed and there I have Icewarp mail-server installed.
When the firewall is stopped, I can connect in my web browser to the admin console, but if it is started then I can't connect to this web console. I probably have to add a rule for this address: http://random.random.net (or https). Maybe is just needed enable ports 80 and 443 which are for http/s?
How to solve this issue or state how add this firewall rule?