[CentOS-mirror] Chinese IPs - Mirror Stats

Scott Adametz Scott.Adametz at bigtennetwork.com
Thu Jan 21 22:16:44 UTC 2010

I do indeed have stats @ http://stats.btnchicago.com/usage_201001.html

Most of the traffic came from Chinese addresses in the,,, and subnets.  According to GeoIP these originate from Beijing, Zhejiang, Hubei, Beijing and Fujian respectively.  Each downloaded approximately 23TB, 17TB, 10TB, 10TB, 10TB and exhibited similar repetitive patterns of the same file. 

The stats analysis is via webalizer (however I also ran analog on the server logs and it confirms the amount of traffic is correct)  On the 15th I began blocking several of the offending /8 subnets (drastic, I know) while we determined what to do next hence the deep drop off in hits.  On the 16th I removed the blocks and tried qdisc throttling and bandwidth management tools via Apache which as you can see only moderately control the rate, not the requests.  It isn’t so much the traffic that we're worried about now as much as the attention being drawn to our network.  The upper management at FOX is not interested in being a target hence the request to terminate the mirror (which has been shut down and will remain down).

We are extremely grateful for all the time and effort put forth by all the CentOS volunteers and offer our sincerest apologies for backing out of the mirror hosting.  It was a decision not made lightly.

Thank you all for the insight and assistance, We hope to find a way to give back to the CentOS project in some other way in the near future.  


Scott Adametz
Systems Engineer
Big Ten Network
600 W Chicago Ave.
Chicago, IL 60654
scott.adametz at bigtennetwork.com
O:312.665.0787   C:708.214.4232

-----Original Message-----
From: centos-mirror-bounces at centos.org [mailto:centos-mirror-bounces at centos.org] On Behalf Of Karanbir Singh
Sent: Thursday, January 21, 2010 3:22 PM
To: Mailing list for CentOS mirrors.
Subject: Re: [CentOS-mirror] Please remove from mirrorlist: mirrors.bigtennetwork.com/CentOS

On 21/01/10 20:06, Scott Adametz wrote:
> Due to an inordinate amount of Chinese based traffic from only a handful
> of IP addresses (over 145 TB transferred to just *12* IP addresses in
> only 15 days since we started hosting the mirror) we are forced to cease
> our participation in the CentOS mirror project. 

Do you have some details on what this traffic is ? as in details to the
number of times they hit your mirror, and what url they were getting
from there ?

Karanbir Singh
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