Server dies every night at 4:00
I have this bug issue for already two nights. It started at 4:00 am on Saturday and again repeated at 4:00 am on Sunday - today.
I have FC6 with ISPConfig 2.2.9. I haven't made any changes to the system for months. And it is a production one with many sites.
The server dies completely. Only a hardware reboot fixes the problem. I can't identify what causes it.
It must be connected to the scripts that start to run at 4:00 am, but I don't know where to look. All common log files don't show anything.
I also monitor the server with snmpd and the graphs are normal. Nothing special. Just after 4:00 am there is no more data for the graphs, because the server is dead.
Please HELP. I need to resolve this before 4:00 am tomorrow.