p0f process - high cpu usage

sehh

• April 24, 2016 17:00

Hello, I've got a server that constantly has an issue with the process "/usr/local/cpanel/3rdparty/sbin/p0f". This particular process gets to 100% cpu usage and gets stuck like that, until I kill it. It seems like its ok on my other servers. Anyone has any suggestions how to tackle this issue? Thank you.

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  SysSachin

  • April 25, 2016 04:06

  Hello, You can refer below post related your issue : Excessive resource usage: cpanelconnecttrack

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  sehh

  • April 25, 2016 06:45

  Thanks for the above link. Eventually I went around all my servers and disabled this feature. I couldn't find a lot of documentation on how to use p0f as a forensic tool.

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  cPanelMichael

  • April 25, 2016 19:18

  Hello :) The Passive OS Fingerprinting daemon (p0f) reports the visitor's operating system and other information for email notifications. This information helps you quickly identify visitors that trigger events that cause alerts. Could you let us know the cPanel and OS versions on this server? Thank you.

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  sehh

  • April 25, 2016 22:30

  It started happening on a second server as well, so I had it disabled on all my servers. They all run CentOS 6.7 with cPanel/WHM 11.54.0.21 (STABLE release channel). I've never had an email with some sort of triggered event or alert. So I'm not sure what these are. All I ever get from my cPanel/WHM servers are the typical "upcp" emails and an occasional cron job failing due to some bug in one of the cPanel perl scripts.

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  cPanelMichael

  • May 04, 2016 19:07

  Could you open a support ticket and reference case CPANEL-2092 if you notice this on additional servers? We have an internal case open to track reports of excessive CPU usage with p0f, but have been unable to reproduce the issue on test systems. Thank you.

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