Re: [CentOS] Server packet loss and becomes unresponsive

2009-11-03 Thread Geoff Galitz
  Does ifconfig or dmesg show any errors?   If the answer to those is no, I'd start running sar to see if there is abnormal behavior which could indicate a hardware problem.   Of course, another possibility is a DDOS.  Do you have any kind security monitoring or protection in place? -geoff

Re: [CentOS] Server packet loss and becomes unresponsive

2009-11-03 Thread Timothy
do you have remote console access i.e. DRAC or ILO ? No. did you mention if any recent OS or other software updates like 5.3 to 5.4 or otherwise? It is a newer box w/ 5.4 installed. someone could be DOS'ing the server ??? Does not appear that way and if it was I would imagine console should

Re: [CentOS] Server packet loss and becomes unresponsive

2009-11-03 Thread mark
Timothy wrote: snip did you mention if any recent OS or other software updates like 5.3 to 5.4 or otherwise? It is a newer box w/ 5.4 installed. someone could be DOS'ing the server ??? Does not appear that way and if it was I would imagine console should still work but it does not. do

[CentOS] Server packet loss and becomes unresponsive

2009-11-02 Thread Timothy
I am at a lost with this server of mine. I have replaced everything except just replacing the entire server. The server is running at a low load but every so often it starts to have high packet loss / latency(the average ms for me is 80 but it jumps to 4000 during this period) and eventually

Re: [CentOS] Server packet loss and becomes unresponsive

2009-11-02 Thread nate
Timothy wrote: Any ideas what could be causing this kind of behavior? What kind of NIC? 80ms is normal if your going a few thousand miles, how far apart is the system your pinging from? If it's a NIC like a Realtek or something don't think twice just get a good server grade NIC. Broadcom or

Re: [CentOS] Server packet loss and becomes unresponsive

2009-11-02 Thread Timothy
From: nate What kind of NIC? 80ms is normal if your going a few thousand miles, how far apart is the system your pinging from? If it's a NIC like a Realtek or something don't think twice just get a good server grade NIC. Broadcom or Intel are common ones. --- It was just an onboard

Re: [CentOS] Server packet loss and becomes unresponsive

2009-11-02 Thread R-Elists
do you have remote console access i.e. DRAC or ILO ? did you mention if any recent OS or other software updates like 5.3 to 5.4 or otherwise? someone could be DOS'ing the server ??? do you run a firewall and drop bad traffic to the floor or is it wide open? you havent mentioned what the