[SR-Users] Mitigating DDOS attacks from carrier based on ani or dnis by limitating cps or blocking when detecting

Alex Balashov abalashov at evaristesys.com
Thu Sep 8 06:23:12 CEST 2016

May I humbly suggest the very flexible pipelimit module?

On 09/08/2016 12:12 AM, anfecora wrote:

> Hi is there any way to use pike and htable to mitigate ddos or  flood
> attack from trusted trunks.
> I need help to build it the same way kamailio control registrations.
> Case a carrier trunk star calling several users from the system to more
> than 50 CPS(calls per second), it will affect the system but cannot
> block the trunk since it is pstn traffic coming from a sip provider,
> therefore we need to find a way to identify this traffic based on ANI or
> DNIS or any other header and then blocked for a time just like pike does
> with registrations, then start the cycle all over.
> in less words make kamailio be aware of  invite request rate, then
> verify that is from the same source means ani or dnis then tagged as bad
> traffic them star dropping it for a specified time, while normal traffic
> still flowing unaffected.
> any recommendations will be highly appreciated.
> thank you
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Alex Balashov | Principal | Evariste Systems LLC

Tel: +1-706-510-6800 (direct) / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/

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