Sorry...

Try with some tool to see what type of traffic. (Munin,cacti,ganglia, etc)

Is in your lan?

Diego Sanchez

Sent from my mobile

-----Original Message----- From: diegors@gmail.com Date: Tue, 3 Dec 2013 20:42:39 To: CentOS mailing listcentos@centos.org Reply-To: diegors@gmail.com Subject: Re: [CentOS] Outbound traffic spike every 30 minutes

Is inbound or outbound? What port? tcp or udp?

------Mensaje original------ De: Bowie Bailey Remitente: centos-bounces@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?