WHMCS + CSF/LFD + namecheap

Hi:
I have installed and updated the namecheap module to the latest version: https://code.google.com/p/namecheap/

I have a server with WHM/Cpanel with CSF+LFD firewall

If i disable the CSF+LFD firewall i can connect with namecheap API but if i enable it i can't so its obvious that is using a port that is not opened.

I'm using the live API (NOT test mode).

What port uses the WHMCS api to connect to namecheap?
I suppose that uses TCP, right?

Thanks.