my server is keep down..

My server was down lastnight and they rebooted and down again and they rebooted again.. it was work fine until tonight.. it is down again and after they rebooted i installed BFD (Brute Force Detection) and APF Firewall succesfuly. after 2 hours it is down again and i cant get ping back or connect with ssh.. Only 2 vbulletin forums work on it, this 2 forums was work on my old (p4, 1gb ram) server.. Now my server is dual xeon 2.4 and 2gb ram. cpanel + centOS 4.x + 100Mbps Uplink from layaredtech. service status all grean colour and server load is fine some times gets red but normaly 3 maxsimum 5 or 6. I dont realy understand why it is happened last 2 days, is anybody have anyidea about this problem...

Thank you

 

 

 

 

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