I came across a very useful tool to troubleshoot connectivity issues and especially related to ports that CA Client Automation uses.
It is a Microsoft utility called PortQryUI which is a graphical tool to check TCP and UDP ports which is very useful in cases where the administrator who is using CA Client Automation may not be aware of network changes but sees in DSM Explorer that agents are not reporting in or may be having issues using deployment wizard and or agent discoveries. It can be helpful to use this tool to verify that the ports are open bi directionally so cam communication
can take place
Here is the link to the utility
This is an example of what you would expect for a successful check of port 4728 TCP which is the pmux port
just enter the FQDN or the IP address of the target you are verifying and the port and protocol and hit query.
For a complete listing of the required ports for CA Client Automation please review the CA Implementation guide Appendix B: Ports Used by CA Client Automation on page 515. This is available in your installation media under the DOC subdirectory.