[Juser] denial of service attack at jabber.org

Styopa Semenukha semenukha at gmail.com
Tue Aug 14 19:18:58 UTC 2012

Hi everyone,

Happily, users can now connect to jabber.org after a short wait and 
send/receive messages. Nevertheless, Gtalk contacts seem offline.

By the way, is there any additional info on the attack? How strong is the 
traffic and what kind of attack is this? Transport level flood or XMPP 
abusing? Are the bots concentrated in some specific region?

I guess this might be just a botnet strength test, because I never heard about 
commercial Jabber services who could be financially interested in our 

P.S.: I'd like to offer my assistance if you still need volunteer admins. I 
don't have practical anti-DDoS experience, but my other skills are: Debian, 
CentOS, RHEL, virtualization (Xen Hypervisor / Cloud Platform), bash, Perl, 
PHP, Apache, nginx, memcached, MySQL. My JID is styopa at jabber.org.

On Sunday, August 12, 2012 05:43:06 PM Peter Saint-Andre wrote:
> As noted at http://www.jabber.org/2012/08/denial-of-service/ ...
> Today we have experienced a distributed denial of service attack
> against the jabber.org IM service. Although the web server and email
> server are running fine, we have been forced to take the IM service
> offline today, until your (volunteer!) admin team has time to
> determine appropriate countermeasures.
> Peter
Best regards,
Styopa Semenukha.

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