[CentOS] Outbound traffic spike every 30 minutes
Bowie_Bailey at BUC.com
Tue Dec 3 22:01:43 UTC 2013
On 12/3/2013 3:42 PM, diegors at gmail.com wrote:
> > ------Mensaje original------ De: Bowie Bailey Remitente:
> > centos-bounces at centos.org Para: CentOS mailing list Responder a:
> > CentOS mailing list Asunto: [CentOS] Outbound traffic spike every 30
> > minutes Enviado: 3 de dic de 2013 19:36
> > 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?
> Is inbound or outbound?
> What port?
> tcp or udp?
It is outbound from my server to the Internet. My traffic monitor does
not give me any more detailed information, just a nice sawtooth graph
showing the regular spikes.
TCP or UDP and the port is part of what I am trying to determine.
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