Where do you find the precise information about which ports should be configured when you include an application server in the DMZ to access the mobility feature? Thanks
Please take a look at
Supported Ports and Port Ranges - CA Service Management - 17.2 - CA Technologies Documentation
as mobile app uses REST so the REST port would need to be open(default is 8050 and this is configurable) and depends on the location of the app server and the background/standby servers, server-to-server slump port(s) would need to be open as well. Reference these tech docs
How does CA Service Desk Manager (SDM) behave with - CA Knowledge
How To Limit SDM Port Bindings - CA Knowledge