How to open an Port by Sophos Firewall XG

Question

Hello, 
 i've got a little question about opnening Ports at Firewall XG. 
 
 For Example - I want to crate a service with the Port 1234 
 
 So after adding a Firewall Rule - I switched to (Protect -> Firewall -> Firewallrule -> Services). Here I added the new service abc, which get acces to the Port 1234. 
 
 So I added a name of the service and the Type (UDP/TCP). See Picture below.

Why should I add in the Field "Source Port" the Value: 1:65535 ? 
 
 Or is this the wrong way to create a service? 
 
 Thank a lot for helping me :D

Ronak Sheth · Accepted Answer

Hello, 
 Yes, this is the correct way. As source port are dynamic and you cannot predict it. That's why you need to include all posts 1:65535  in source. 
 Regards, Ronak.