BCP38.info

Tue Jan 28 18:27:24 UTC 2014

We see this all the time with banking sites and some of the stock 
trading ones

Todd

On 1/28/2014 5:06 AM, Jared Mauch wrote:
> On Jan 26, 2014, at 12:47 PM, Jay Ashworth <jra at baylink.com> wrote:
>
>> something like 6 years ago, and couldn't get any traction on it then;
>> I'm not sure I think much has changed -- apparently, extracting your
>> BP thoughts from mailing list postings and putting them into a wiki is
>> more effort than most NANOGers are up to.
> I do have a list of the top ASNs that can be shown to allow IP spoofing by looking at
> the DNS scans part of the OpenResolverProject:
>
>    52731 ASN7922
>    31251 ASN9394
>    25241 ASN17964
>    15951 ASN4847
>     7576 ASN17430
>     5800 ASN17430
>     4110 ASN7497
>     3645 ASN9812
>     3492 ASN6854
>
> http://openresolverproject.org/spoof-src-dst-asns-20140126.txt
>
> What the data is:
>
> It includes IP address where you send a DNS packet to it and another IP address responds to the query, e.g.:
>
> [jared at hostname ~/spoof]$ dig @101.0.37.11
> ;; reply from unexpected source: 182.19.83.65#53, expected 101.0.37.11#53
>
> The data only includes those where the “source-ASN” and “dest-asn” of these packets don’t match.
>
> - Jared
>
>
>
>
>

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