[EXTERNAL] VoIP Provider DDoSes

Tue Sep 21 22:39:18 UTC 2021

*nods* We have a Metaswitch SBC. 

So as long as the pipe isn't full, an SBC is the buffer one needs? If the pipe is filled, pump it through {insert DDoS mitigation service here}? 

----- 
Mike Hammett 
Intelligent Computing Solutions 
http://www.ics-il.com 

Midwest-IX 
http://www.midwest-ix.com 

----- Original Message -----

From: "Rich A Compton" <Rich.Compton at charter.com> 
To: "Mike Hammett" <nanog at ics-il.net>, "NANOG" <nanog at nanog.org> 
Sent: Tuesday, September 21, 2021 4:59:06 PM 
Subject: Re: [EXTERNAL] VoIP Provider DDoSes 

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. 

-Rich 

From: NANOG <nanog-bounces+rich.compton=charter.com at nanog.org> on behalf of Mike Hammett <nanog at ics-il.net> 
Date: Tuesday, September 21, 2021 at 3:31 PM 
To: NANOG list <nanog at nanog.org> 
Subject: [EXTERNAL] VoIP Provider DDoSes 

CAUTION: The e-mail below is from an external source. Please exercise caution before opening attachments, clicking links, or following guidance. 

As many may know, a particular VoIP supplier is suffering a DDoS. https://twitter.com/voipms 

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. 

----- 
Mike Hammett 
Intelligent Computing Solutions 
http://www.ics-il.com 

Midwest-IX 
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