How do I open port 8080 to allow unifi adoption through sonicwall

Hi, 

First time posting :)

We use Unifi AP's that are behind a sonicwall. How do I open port 8080 to allow the adoption to the unifi cloud controller. When I try to nmap -p 8080 it is being blocked. So far I have setup a custom service object for 8080 but I am not sure where to proceed from here. I just need port 8080 open inbound/outbound to the entire LAN???