How to find the reason for Media Agent/Mount Path Offline

Hello @backup 

I would recommend the CVMA.log on the Media agent and MediaManager.log on the CS to know what and when happened.

These are the kinds of issues that are best troubleshooted under a support case. 

Kind regards

Albert Williams

Thanks @Albert Williams, we will refer the logs as recommended.

@backup 

View the Check Readiness for the MediaAgent (in the CommCell Browser, right-click on the computer, and then go to All Tasks > Check Readiness), and take the appropriate action if they show non-ready status. 

As already mentioned check MediaManager.log, cvfwd.log on CS and CVMA.log on MA.

did you check whether a local firewall rule exists on the linux box ?
if so, it might be required to restrict the ports used between mediaagent and commserve or mediaagent an clients.

In some environments I was forced to implement one-way network topologies, because the server was only able to initiate a communication and cannot be reached from the other side.
On a two-way topology, existing/initiated tunnels are used as long as the exist, but dropped after a while of inactivity.