Hi Laurens, So, how did you do your deployment, and which product did you choose and why? :)
Thank you for your time! Andre --- Laurens Vets <[email protected]> schrieb am Mi, 29.7.2009: > Von: Laurens Vets <[email protected]> > Betreff: Re: IPS - Cisco vs. McAfee vs. Tippingpoint > An: [email protected] > CC: "Hurgel Bumpf" <[email protected]> > Datum: Mittwoch, 29. Juli 2009, 11:55 > Hey Andre, > > > i need to protect a "realtime" website with an inline > IPS from (D)DOS attacks. > > That's going to be though with an IPS... > > > I had some bad experience with Tippingpoint UnityOne > 2400 field test. The device dropped to much sessions until > all connectivity was lost. After that no investigation was > not possible as TP logs all attack information with IP > address 0.0.0.0 > > The vendor excused this with the layered technology > and passing the IP address from the hardware to the logger > would lead to delayed packages) > > > > This is unacceptable. > > > > i'm now looking forward to test a Cisco IPS 4270-20 > and a McAfee Network Security 4050 appliance. > > Who has a good/bad experience with that devices? Is it > true that all devices don't log ip adresses? > > If you want to block a DDOS with an IPS, good luck with > that :) Normally, most devices do log source and destination > addresses. However, depending on the alert generated by the > IPS, you still might see 0.0.0.0 as source for instance. > This means that the alert triggered with a lot of different > source addresses. > > > My dream appliance would be able to run like in a 7 > day learning mode which counts max new sessions per second, > max sessions per client aso. After this 7 days it creates a > filter with +x% of the learned values and sets these limits > active. > > I don't think any of the systems mentioned above can > actually do this. I'll talk in general terms as I only have > experience with Cisco (and other IPSses you didn't > mention). > > IPSes inspect traffic for defined patterns in that traffic. > They will generally see that there's a lot of traffic when > there's a (D)DOS (and can report some of it. E.g it will > notice a SYN flood for instance), but if the traffic is > legitimate (e.g. 'normal' HTTP requests to http://company.com, but coming > from a lot of different > sources) it won't "see" anything bad and can't take action > on this traffic. > I don't think a Cisco IPS can do statistical analysis of > the traffic (E.g. "alert when this type of traffic has an > 80% increase over the last 2 hours"). > > If an IPS sees too much packets to process (legitimate or > not), it will either drop them or pass them unanalyzed. > > > A big problem is that i have to install it into the > productive system to get the real values. I dont have any > fixed values regarding the new sessions per second and i > cant just guess and set values and render the system > offline. > > Most inline IPSes can be put inline without actually > blocking anything, usually called learning mode or > monitoring mode. > > Hope this helps a bit. > > -Laurens > ----------------------------------------------------------------- Securing Your Online Data Transfer with SSL. A guide to understanding SSL certificates, how they operate and their application. By making use of an SSL certificate on your web server, you can securely collect sensitive information online, and increase business by giving your customers confidence that their transactions are safe. http://www.dinclinx.com/Redirect.aspx?36;5001;25;1371;0;1;946;9a80e04e1a17f194
