[VoiceOps] VoIP Provider DDoSes

[Joseph Jackson]

Is now.  If you look at their BGP announcements over the last week using something like bgplay you can see them move all their prefixes behind cloudflare.



From: Mike Hammett [mailto:voiceops at ics-il.net]
Sent: Saturday, October 02, 2021 10:30 AM
To: Joseph Jackson
Cc: Tim Bray; voiceops at voiceops.org
Subject: Re: [VoiceOps] VoIP Provider DDoSes

Has been or is now?


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



Midwest Internet Exchange
http://www.midwest-ix.com



________________________________
From: "Joseph Jackson" <jjackson at aninetworks.net>
To: "Tim Bray" <tim at kooky.org>, voiceops at voiceops.org
Sent: Saturday, October 2, 2021 9:43:23 AM
Subject: Re: [VoiceOps] VoIP Provider DDoSes
Bandwidth.com is using cloudflares magic transit for DDOS protection.  Seems to be working ok.  CF says it doesn’t matter the protocol they can scrub the traffic.



From: VoiceOps [mailto:voiceops-bounces at voiceops.org] On Behalf Of Tim Bray via VoiceOps
Sent: Friday, October 01, 2021 9:34 AM
To: voiceops at voiceops.org
Subject: Re: [VoiceOps] VoIP Provider DDoSes



On 26/09/2021 21:54, Mike Hammett wrote:

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.




Without saying too much:



Seems to be a spate of DDOS against UK based voip providers at the moment.   For ransom.  Don't pay.



One provider said that traditional approaches did not work.   They tried Voxility but just got false positives.    There are providers that do work.



But in the UK a lot of traffic goes over peers through internet exchanges.  So just swapping transit only half the problem.

Prep wise:

So practice altering your IP advertisements, dropping and bringing up peers.  If you connect to route servers, practice doing selective announcements.  Try to get private interconnects to your upstream telco providers.    Get your network teams warmed up for when it does happen.    If you host with a cloud provider, have a backup because if DDOS is coming from the same cloud .....





Tim

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