I have rebooted the server - same issue
It was a major patch run, the previous network admins had let the patching go over a year, so finding the patch which potentially caused the problem will be extremely difficult.
I have run symdiag tool, which basically confirms the service isn't running which it requires. I can start the service again, but it stops as soon as you attempt to login.
Afterr checking the scm-server-0.log file I see these errors repeating:
THREAD 184718 SEVERE: Error in ClientTransportInfoTask starting client transport after SEPM service started
java.net.SocketException: Connection reset
com.sygate.scm.common.communicate.CommunicationException: Failed to connect to the server.
Make sure that the server is running and your session has not timed out.
If you can reach the server but cannot log on, make sure that you provided the correct parameters.
If you are experiencing network issues, contact your system administrator. ErrorCode: 0x80020000
THREAD 184718 SEVERE: in: com.sygate.scm.server.task.ClientTransportInfoTask
java.net.SocketException: Connection reset
com.sygate.scm.common.communicate.CommunicationException: Unexpected server error. ErrorCode: 0x10010000
at com.sygate.scm.server.task.ClientTransportInfoTask.getClientTransportInfo(ClientTransportInfoTask.java:519)
at com.sygate.scm.server.task.ClientTransportInfoTask.execute(ClientTransportInfoTask.java:140)
at com.sygate.scm.server.task.MonitoredTimerTask.run(MonitoredTimerTask.java:41)
at java.util.TimerThread.mainLoop(Timer.java:555)
at java.util.TimerThread.run(Timer.java:505)
2016-04-21 21:36:19.096 THREAD 184720 SEVERE: in: com.sygate.scm.server.task.AgentLastCheckInTask
java.net.SocketException: Connection reset