ddptr runs (i) UDP traceroutes to all DNS servers that are in the DNS delegation path for a fully qualified domain name (FQDN), and (ii) TCP traceroutes to port 80 of the same FQDN. Then, the tool maps the IP addresses of all intermediate hops to autonomous system numbers and determines the set intersections.

ddptr is useful for traffic analysis experiments, i.e., quantifying the threat of AS-level adversaries.

You will need the Python modules scapy and pyasn.

The tool takes as input a FQDN and an ASN database. Instructions on how to build such a database are online.

Here is a simple example:

$ sudo ./ddptr www.google.com /path/to/asn/database

In my case, the tool tells me:

8 ASNs in DNS hops: 15169,88,36616,2828,7029,174,27064,3356
3 ASNs in web hops: 15169,88,174
3 intersections between web and DNS ASNs: 15169,88,174
5 ASNs in DNS but not in web ASNs: 27064,7029,36616,2828,3356
0 ASNs in web but not in DNS ASNs:

You can also use the parameter --graph-output to generate traceroute visualisations such as the following:

Contact: Philipp Winter phw@nymity.ch
OpenPGP fingerprint: B369 E7A2 18FE CEAD EB96 8C73 CF70 89E3 D7FD C0D0