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 <[EMAIL PROTECTED]> 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 > > > > > >
