Re: Slow http denial of service

2015-03-16 Thread Aurélien Terrestris
As browsers (at least the ones I know) open 2 connections to browse websites, we could have a look on the hourly stats and estimate this (under 100 without problem). I never met such problem anyway, the highest trafic being 120 000 different users/day. If you really have to face DDOS as said by

Re: Slow http denial of service

2015-03-16 Thread Christopher Schultz
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Robert, On 3/16/15 8:41 AM, Robert Klemme wrote: On Sun, Mar 15, 2015 at 10:07 AM, Aurélien Terrestris aterrest...@gmail.com wrote: I agree with the NIO connector which gives good results to this problem. Also, on Linux you can configure

Re: Slow http denial of service

2015-03-16 Thread David kerber
On 3/16/2015 8:41 AM, Robert Klemme wrote: On Sun, Mar 15, 2015 at 10:07 AM, Aurélien Terrestris aterrest...@gmail.com wrote: I agree with the NIO connector which gives good results to this problem. Also, on Linux you can configure iptables firewall to limit the number of connections from

Re: Slow http denial of service

2015-03-16 Thread Aurélien Terrestris
Christopher, there are several questions in the same thread.. The first one about SlowLoris was answered a long ago ( http://tomcat.10.x6.nabble.com/is-tomcat-6-0-35-vulnerable-to-CVE-2007-6750-td585.html ). On the contrary, for fast connections opening (DOS), we can configure the firewall in

Re: Slow http denial of service

2015-03-16 Thread Robert Klemme
On Sun, Mar 15, 2015 at 10:07 AM, Aurélien Terrestris aterrest...@gmail.com wrote: I agree with the NIO connector which gives good results to this problem. Also, on Linux you can configure iptables firewall to limit the number of connections from one IP (

Re: Slow http denial of service

2015-03-16 Thread Christopher Schultz
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Aurélien, On 3/16/15 9:16 AM, Aurélien Terrestris wrote: As browsers (at least the ones I know) open 2 connections to browse websites That number has been bigger than 2 for quite a while, now:

Re: Slow http denial of service

2015-03-15 Thread Aurélien Terrestris
Nemecek wrote: Hello, our webapp, that is deployed in Tomcat 8.0.18, was tested positive as vulnerable to the slow http denial of service: By using a single computer, it is possible to establish thousands of simultaneous connections and keep them open for a long time. During the attack

Re: Slow http denial of service

2015-03-14 Thread Christopher Schultz
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Petr, On 3/14/15 3:32 PM, Petr Nemecek wrote: Hello, our webapp, that is deployed in Tomcat 8.0.18, was tested positive as vulnerable to the slow http denial of service: By using a single computer, it is possible to establish thousands

Slow http denial of service

2015-03-14 Thread Petr Nemecek
Hello, our webapp, that is deployed in Tomcat 8.0.18, was tested positive as vulnerable to the slow http denial of service: By using a single computer, it is possible to establish thousands of simultaneous connections and keep them open for a long time. During the attack, the server was rendered

Re: Slow http denial of service

2015-03-14 Thread Mark Eggers
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 3/14/2015 12:32 PM, Petr Nemecek wrote: Hello, our webapp, that is deployed in Tomcat 8.0.18, was tested positive as vulnerable to the slow http denial of service: By using a single computer, it is possible to establish thousands