[CentOS] Outbound traffic spike every 30 minutes
Bowie_Bailey at BUC.com
Tue Dec 3 21:36:54 UTC 2013
Since Sunday morning, one of my CentOS servers has been generating a
small spike of outbound traffic every 30 minutes (X:00 and X:30). It's
not enough traffic to really cause any notice except for the fact that
it is a very regular pattern and it started abruptly at midnight Sunday.
This server is used for mail (Courier-MTA), and DNS (Bind). I cannot
find anything unusual in either of those logs. I tried grepping through
my firewall logs, but have been unable to find anything useful there
either. I don't see any cron jobs that would generate network traffic.
Any suggestions how I can go about tracking this down?
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