Which Port need to be open?

[riyazzz]

Hi guys,
I just installed csf for my ubuntu server and i think it is really big for me as csf provide a lot of settings compared to ufw.
There are several questions that i wanted to ask.
1) I dont provide dns server service and im using dynamic ip with dyn dns. Do i need to open port 53?
2) Can someone guide me or can i get a really deep guideline on how to conifgure csf from the initial.
3) During the initial installation, the testing flag is already enabled, do i need to disabled it?
4) What is lfd?
5) I dont install ssh server, do i need to enable port 22?
Im new with csf and i hope that you guys can help me.

[iodisciple]

1. Outgoing yes
2. https://www.configserver.com/cp/csf.html at the bottom is documentation
3. Yes if you are ready to use it
4. Login failure deamon
5. No (how do you manage your server?)