Re: Kenyan Route Hijack

["Paul Ferguson" <fergdawg () netzero net>]

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- -- "Bill Stewart" <nonobvious () gmail com> wrote:

> I've seen two popular reasons for doing it accidentally
> - Fat fingers when configuring IP addresses by hand
> - Using old routing protocols such as IGRP or RIP and autosummarizing
> routes, 
>  usually done by a customer of an ISP that doesn't bother filtering
> carefully. 
>  This doesn't give you a /24 address by accident,
>  but it lets you take two /24 subnets of a Class B or Class A
>  and turn them into an advertisement for the whole network.

Also: I have seen instances where a static route points to a next
hop that (inadvertently) may be "redistribute-static" injected into
BGP. This happens occasionally due to ad hoc configurations, back-
hole null routing, etc.

- - ferg

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--
"Fergie", a.k.a. Paul Ferguson
 Engineering Architecture for the Internet
 fergdawg(at)netzero.net
 ferg's tech blog: http://fergdawg.blogspot.com/