[CentOS-mirror] [Ticket#2020100504000801] Potential DOS attack against a mirror

Thomas Enos

thomas.enos at afghan-wireless.com
Mon Oct 5 17:34:43 UTC 2020


We can confirm being hit by 27.221.66.0/24 pulling the same iso as well.  What action was taken to address this by your networks?

Thanks,

From: CentOS-mirror <centos-mirror-bounces at centos.org> on behalf of Bogdan-Stefan Rotariu <bogdan.rotariu at chroot.ro>
Reply to: "Mailing list for CentOS mirrors." <centos-mirror at centos.org>
Date: Monday, 5 October 2020 at 9:30 PM
To: CEDIA FOSS Mirrors <mirror at cedia.org.ec>, "Mailing list for CentOS mirrors." <centos-mirror at centos.org>
Subject: Re: [CentOS-mirror] [Ticket#2020100504000801] Potential DOS attack against a mirror

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Hi there,

On Oct 5, 2020, at 20:24, CEDIA FOSS Mirrors via CentOS-mirror <centos-mirror at centos.org> wrote:
hi

<snip>

112.95.214.226 - China Unicom Guangdong province network
223.88.61.170   - China Mobile Communications Corporation
171.41.7.29       - CHINANET Hubei province network
120.84.10.190   - China Unicom Guangdong province network
27.221.66.104   - China Unicom Shandong province network
27.221.66.105   - China Unicom Shandong province network
112.32.21.93     - China Mobile Communications Corporation
27.221.49.135   - China Unicom Shandong province network

Have you noticed that in your mirrors? look for these IP and notice if they have been trying to continously download iso

We did encounter the same issues with the same IP addresses and same iso file. Till now I thought it was an isolated issue..

—
Bogdan-Stefan Rotariu
CTO,Founder
Chroot Network SRL
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