RE: Switch with high ACL capacity

[Mike Hammett <nanog () ics-il net>]

If the DDoS exceeds capacity, I simply resort to the RTBH. Until then, if I can handle it more delicately, then great. 
If I can handle it by adjusting routing policy (shy of blackholing) or by dropping traffic selectively until then, I 
deliver a better experience.

Eyeball networks can handle DDoSes a bit differently than content guys because most of our traffic is on just a handful 
of ASNs on a few ports.




-----Mike HammettIntelligent Computing SolutionsMidwest Internet ExchangeThe Brothers WISP

----- Original Message -----
From: Ryan Hamel <Ryan.Hamel () quadranet com>
To: Mike Hammett <nanog () ics-il net>, Lotia, Pratik M <Pratik.Lotia () charter com>
Cc: 'nanog list' <nanog () nanog org>
Sent: Tue, 06 Nov 2018 13:52:38 -0600 (CST)
Subject: RE: Switch with high ACL capacity

Mike,

Are you sure you have enough inbound capacity to setup such a thing? Do you have RTBH setup for the final means of 
killing the attack?

If you could get another set of circuits to feed this switch from your same providers, and they accept more specific 
announcements, you could use this to swing /32's or /128's to said dedicated links so it won't affect your clients 
traffic.

--
Ryan Hamel
Network Administrator
ryan.hamel () quadranet com | +1 (888) 578-2372
QuadraNet Enterprises, LLC. | Dedicated Servers, Colocation, Cloud


-----Original Message-----
From: NANOG <nanog-bounces+ryan.hamel=quadranet.com () nanog org> On Behalf Of Mike Hammett
Sent: Tuesday, November 06, 2018 11:47 AM
To: Lotia, Pratik M <Pratik.Lotia () charter com>
Cc: 'nanog list' <nanog () nanog org>
Subject: Re: Switch with high ACL capacity

The intent is to see if I can construct a poor man's DDOS scrubber. There are low cost systems out there for the 
detection, but they just trigger something else to do the work. Obviously there is black hole routing, but I'm looking 
for something with a bit more finesse.

If I need to get a switch anyway, might as well try to take advantage of it for other uses.

-----Mike HammettIntelligent Computing SolutionsMidwest Internet ExchangeThe Brothers WISP

----- Original Message -----
From: Lotia, Pratik M <Pratik.Lotia () charter com>
To: Mike Hammett <nanog () ics-il net>, 'nanog list' <nanog () nanog org>
Sent: Tue, 06 Nov 2018 12:29:15 -0600 (CST)
Subject: Re: Switch with high ACL capacity

Mike,

Can you shed some light on the use case? Looks like you are confusing ACLs and BGP Flowspec. ACLs and Flowspec rules 
are similar in some ways but they have a different use case. ACLs cannot be configured using Flowspec announcements. 
Flowspec can be loosely explained as 'Routing based on L4 rules' (there's a lot more to it than just L4). I doubt if a 
there is a Switch which can hold a large number of Flowspec entries.

 
~Pratik Lotia
“Improvement begins with I.”
 

On 11/6/18, 10:39, "NANOG on behalf of Mike Hammett" <nanog-bounces () nanog org on behalf of nanog () ics-il net> 
wrote:

    I am looking for recommendations as to a 10G or 40G switch that has the ability to hold a large number of entries 
in ACLs.
    
    Preferred if I can get them there via the BGP flow spec, but some sort of API or even just brute force on the 
console would be good enough.
    
    Used or even end of life is fine.
    
    -----Mike HammettIntelligent Computing SolutionsMidwest Internet ExchangeThe Brothers WISP
    

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