insomniacslk/nsidenumerator

Enumerate DNS servers using the NSID EDNS extension (RFC 5001)

nsidenumerator's Issues

RIPE Atlas

Yopu can also note this is doable with the network of RIPE Atlas probes. Thanks to the API, it is easy to automate it. For instance:

% atlas-resolve -r 10 --nsid -e k.root-servers.net -t TXT .

Nameserver k.root-servers.net
[NSID: ns1.pl-gdy.k.ripe.net] : 1 occurrences 
[NSID: ns2.nl-ams.k.ripe.net] : 1 occurrences 
[NSID: ns1.de-kae.k.ripe.net] : 1 occurrences 
[NSID: ns3.nl-ams.k.ripe.net] : 2 occurrences 
[NSID: ns2.gb-lon.k.ripe.net] : 1 occurrences 
[NSID: ns1.bg-sof.k.ripe.net] : 1 occurrences 
[NSID: ns1.fr-par.k.ripe.net] : 1 occurrences 
[NSID: ns1.nl-ams.k.ripe.net] : 1 occurrences 
Test #10099383 done at 2017-10-30T15:20:29Z

The good thing is that you can select probes per AS, per prefix or per country. Here, we ask only Brazil:

% atlas-resolve -r 10 --country BR --nsid -e k.root-servers.net -t TXT .

Nameserver k.root-servers.net
[NSID: ns2.us-mia.k.ripe.net] : 3 occurrences 
[NSID: ns3.us-mia.k.ripe.net] : 3 occurrences 
[NSID: ns2.gb-lon.k.ripe.net] : 1 occurrences 
[NSID: ns1.us-mia.k.ripe.net] : 2 occurrences 
Test #10099409 done at 2017-10-30T15:24:58Z

-4 and -6 options?

This is a fabulous utility.

Since DNS resolution is supported for target, it might be handy to have a -4 and -6 options to force IPv4 or IPv6 for the target.

My output:

$ python3 nsidenumerator.py b.root-servers.net
Found 1 servers
b'b2-lax'

## Statistics
Total DNS queries      : 1
Timeouts               : 0
Percent failed queries : 0.00

## Warnings
    none

I was wondering which protocol this hit, so I had run again each time for the v4 and v6 addresses.

$ python3 nsidenumerator.py 199.9.14.201
Found 1 servers
b'b2-lax'

## Statistics
Total DNS queries      : 1
Timeouts               : 0
Percent failed queries : 0.00

## Warnings
    none
$ python3 nsidenumerator.py 2001:500:200::b
Found 1 servers
b'b2-mia'

## Statistics
Total DNS queries      : 1
Timeouts               : 0
Percent failed queries : 0.00

## Warnings
    none