community real-time BGP hijack notification service

Christian Koch christian at broknrobot.com
Fri Sep 12 08:49:39 CDT 2008


It is, agreed. But what is more likely; a simple a prefix hijack or an
all out attack, manipulating origin as, and as_path? While the 2nd is
possible, the first is the most likely, and the basis for all these
"hijack alert" services.


Christian



On Fri, Sep 12, 2008 at 9:27 AM, Nathan Ward <nanog at daork.net> wrote:
> On 13/09/2008, at 1:14 AM, Christian Koch wrote:
>
>> Maybe a better idea would be if you were able to input your origin asn
>> and define your upstreams and/or peers, to be alerted on as well. (ie:
>> Do not alert me on any paths containing  123_000, 456_000, 789_000).
>
>
> Again, that is trivially easy to falsify.
>
> My best quick hack solution so far is to fire off a traceroute and make sure
> that the traceroute gets ICMP TTL expire messages from IP addresses that are
> in prefixes originated from all the ASes in the ASPATH.
> Still forgeable, but a bit more difficult.. still far from perfect though.
>
> --
> Nathan Ward
>
>
>
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