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</o:shapelayout></xml><![endif]--></head><body lang=EN-AU link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>Can’t Layer 7 attacks can be prevented by DDoS mitigation…?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>GET/POST authentication, IP blocking, IP tables at the network level etc?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>If it was an HTTP flood, why was the peering changed?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>An interesting article on load balancing and DDoS mitigation<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'><a href="https://www.sans.org/reading-room/whitepapers/firewalls/leveraging-load-balancer-fight-ddos-33408">https://www.sans.org/reading-room/whitepapers/firewalls/leveraging-load-balancer-fight-ddos-33408</a> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Andy Taylor<o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Technical Director<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>0424 656 973<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><img border=0 width=213 height=83 style='width:2.2187in;height:.8645in' id="Picture_x0020_1" src="cid:image001.png@01D1F2F3.6030A330" alt="ca_logo"><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><a href="http://www.coastalaudio.com.au/"><span style='color:#0563C1'>www.coastalaudio.com.au</span></a> <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Scott Howard [mailto:scott@doc.net.au] <br><b>Sent:</b> Wednesday, 10 August 2016 10:22 AM<br><b>To:</b> James Braunegg <james.braunegg@micron21.com><br><b>Cc:</b> andy@coastalaudio.com.au; Nathan Brookfield <Nathan.Brookfield@simtronic.com.au>; James Hodgkinson <yaleman@ricetek.net>; Tim Raphael <raphael.timothy@gmail.com>; ausnog@lists.ausnog.net<br><b>Subject:</b> Re: [AusNOG] census issues tonight<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><div><div><p class=MsoNormal>On Tue, Aug 9, 2016 at 5:03 PM, James Braunegg <<a href="mailto:james.braunegg@micron21.com" target="_blank">james.braunegg@micron21.com</a>> wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:black'>If you look on public peering exchanges around the world for an abnormal increase of traffic during last night, you don’t see any such increase, nor any evidence.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:black'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:black'>I.e. When CloudFlare reported a large 300gbit+ scale NTP reflection attack back in 2014 peering’s graphs around the world showed a spike in traffic.</span><o:p></o:p></p></div></div></blockquote><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>You are presuming a network-based DDoS. Application-level (D)DoS's are often much simpler to do, and will not result in a visible increase in traffic.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal> Scott<o:p></o:p></p></div></div></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>No virus found in this message.<br>Checked by AVG - <a href="http://www.avg.com">www.avg.com</a><br>Version: 2016.0.7690 / Virus Database: 4633/12782 - Release Date: 08/09/16<o:p></o:p></p></div></body></html>