Here is the snippet in the CSF config template in regards to the ports that are allowed by default:
# Allow incoming TCP ports
TCP_IN = "22,25,53,80,110,143,443,465,587,993,995,3000,3443,4040,4242,4747,5757,5050,8000,8081,8181,8384,8888,8989,9117,20000:61000,65080"
# Allow outgoing TCP ports
TCP_OUT = "22,25,53,80,110,113,443,587,993,995,3000,3443,4040,4242,4747,5757,5050,8000,8081,8181,8384,8888,8989,9117,20000:61000,65080"
# Allow incoming UDP ports
UDP_IN = "22,53,3000,3443,4040,4242,4747,5757,5050,8000,8081,8181,8384,8888,8989,9117,20000:61000,65080"
# Allow outgoing UDP ports
# To allow outgoing traceroute add 33434:33523 to this list
UDP_OUT = "22,53,113,123,3000,3443,4040,4242,4747,5757,5050,8000,8081,8181,8384,8888,8989,9117,20000:61000,65080"
It looks like you would, in fact, have issues trying to access that port. You could add this to the list of allowed ports through the CSF GUI.