Re: DDOS, IDS, RTBH, and Rate limiting

[srn.nanog () prgmr com]

http://www.andrisoft.com/software/wanguard/ddos-mitigation-protection

https://bitbucket.org/tortoiselabs/ddosmon

https://github.com/FastVPSEestiOu/fastnetmon

I have no idea if any of them actually work.

On 11/08/2014 05:10 PM, Eric C. Miller wrote:
> Today, we experienced (3) separate DDoS attacks from Eastern Asia, all generating > 2Gbps towards a single IP address 
> in our network. All 3 attacks targeted different IP addresses with dst UDP 19, and the attacks lasted for about 5 
> minutes and stopped as fast as they started.
>
> Does anyone have any suggestions for mitigating these type of attacks?
>
> A couple of things that we've done already...
>
> We set up BGP communities with our upstreams, and tested that RTBH can be set and it does work. However, by the time 
> that we are able to trigger the black hole, the attack is almost always over.
>
> For now, we've blocked UDP 19 incoming at our edge, so that if future, similar attacks occur, it doesn't affect our 
> internal links.
>
> What I think that I need is an IDS that can watch our edge traffic and automatically trigger a block hole 
> advertisement for any internal IP beginning to receive > 100Mbps of traffic. A few searches are initially coming up 
> dry...
>
>
>
> Eric Miller, CCNP
> Network Engineering Consultant
> (407) 257-5115