[ad] Dnsscan is a tool for finger printing open recursive resolvers. It runs in conjuction with a small server that knows how to reply to queries forwarded from probed resolvers. For example, assume that you have delegated osd.example.org:
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osd.example.org. 900 IN NS ns1.example.org. ns1.example.org. 900 IN A 10.0.0.1 |
On 10.0.0.1, you would run:
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# ./dnsresponder -Q .osd.example.org |
On the client that initiates the DNS probes, you would […]