We are using Symantec Backup Exec 2014 installed on a Windows Server 2012 platform. All backups work without issue (normally) and we are only experiencing issues with those servers in our DMZ.
The DMZ servers (neither virtual ones or the physical ones) would not accept the agent via push from the BUE console. We opened the firewall so these servers could communicate using any port in both directions with the BUE server. The issue appeared to be UAC so we removed that via the registry and it allowed us to install the agent, establish trust and setup a job which worked without issue.
We come in the following day and it cannot establish a connection - the very same issue again. No changes have been made since yesterday, yet it cannot communicate with the DMZ server.
I can ping successfully in both directions with both IP address and the servers name. I can also navigate to the c$ drive on the server if I provide the right credentials. I am using the same credentials in BUE and this also works in both directions.
So my question: why do the credentials work when navigating manually, the network and DNS etc all works ok, ports are open but something is preventing communication from within BUE 2014. What? Is it a UAC issue and has anyone an idea of how to correct it? The servers in the DMZ are a mix of Windows Server 2003, 2008 R2 and 2012 R2 versions, but all report exactly the same failure.
We have tried installing the agent on the target server, but this does not change the communication error between the servers.