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<p class="MsoNormal"><span style="font-size:12.0pt">Most of the larger DDoS mitigation appliances can block malformed SIP traffic and also can block volumetric/state exhaustion UDP floods. A lot of VoIP companies have Session Border Controllers (SBCs) to protect
public facing VoIP services. SBCs are more application aware. Kind of like a proxy based firewall just for VoIP.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">-Rich<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">NANOG <nanog-bounces+rich.compton=charter.com@nanog.org> on behalf of Mike Hammett <nanog@ics-il.net><br>
<b>Date: </b>Tuesday, September 21, 2021 at 3:31 PM<br>
<b>To: </b>NANOG list <nanog@nanog.org><br>
<b>Subject: </b>[EXTERNAL] VoIP Provider DDoSes<o:p></o:p></span></p>
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<strong><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:white">CAUTION:</span></strong><span style="font-size:10.0pt;color:white"> The e-mail below is from an external source. Please exercise caution before opening attachments, clicking
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">As many may know, a particular VoIP supplier is suffering a DDoS. https://twitter.com/voipms
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Are your garden variety DDoS mitigation platforms or services equipped to handle DDoSes of VoIP services? What nuances does one have to be cognizant of? A WAF doesn't
mean much to SIP, IAX2, RTP, etc.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><br>
<br>
-----<br>
Mike Hammett<br>
Intelligent Computing Solutions<br>
http://www.ics-il.com<br>
<br>
Midwest-IX<br>
http://www.midwest-ix.com<o:p></o:p></span></p>
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