Hi All,
We are using exchange server 2013, and barracuda spam filtering solution,all the inbound/outbound emails passes through barracuda on port 25, our CAS server is public facing for active sync, owa, ecp and mapi connections, i wanted to know what are ports that needs to be opened on CAS server,
i know there are lot of articles for port requirement for internet facing CAS server but that is the case when there is no third party email filtering solution, in my case i have a third party email filtering solution, .
so what ports needs to be kept open i as i need to close all the other ports as security best practice.
Regards
ITGeek
TechGUy,System Administrator.