Discovery MID server inbound ports/ firewall requirments on trusted zone

[krishsenthil]

https://docs.servicenow.com/bundle/geneva-it-operations-management/page/product/discovery/concept/c_...

The above article is old (Geneva) but states...

“The MID Server communicates securely on port 443 to the instance and requires no inbound connections.”
MID Server that runs Discovery requires only OUTBOUND traffic over port 443. There is no INBOUND traffic requirement ??

If any article related to inbound traffic requirement.

Please share any article for mid server installation requirements on the trusted  zones. 

[DaveHertel · Accepted solution]

Hi - The point of 'inbound' comment is that the instance never initiates inbound communications.  The MID server initiates and handles all traffic flow between the MID and instance.   When the instance has work to be done, it puts commands into an queue table (ECC_Queue) and the MID server checks for (on its outbound connection from MID to instance) the commands to be executed.

MID Server installation doc site London

[Priyesh Kuniyil]

Hello, Can you please let me know which port is used to communicate between the MID server and the ServiceNow discovery agent.