I don't get it. Where am I loosing bandwidth?

I'm using VnStat to track the bandwidth I'm using daily. So, here is the page:

http://www-lab.com/vnstat.php

Also I have APF firewall installed, which opens only nessesary ports. Also, /user/bin/wget was chmoded to 700, so that nobody can run it using scripts.

Bandwidth stats in WHM show that my server is using like 300MB per day.

I noticed one thing. Last 4 days after 2 AM, my server according to VnStat is using more than 1400GB of traffic. How can it be?

Ports are blocked, wget is chmoded, dom_logs are ok. What is the problem here. And No, my box was not rooted.

Please, can somebody explain this ?

Thanks

 

 

 

 

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