I'm exploring Linux for the first time and am having trouble making a connection through the Linux gufw firewall with both Filezilla FTP, and when I try to login in to my cpanel account through Chrome browser.

Filezilla and the cpanel login both work when I turn the firewall off. But NOT when I turn it back on. I assume I have to create a rule to allow a certain port in the Firewall, for it to work. I already allowed FTP and SSH (at least I think I did but this is all rather obscure in learning it). Is there something else I should "allow"? My ignorance of this as you can tell, is rather extensive...