dnsscan – DNS Open Recursive Resolver Scanner/Scanning Tool
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: 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: # ./dnsresponder -Q [...]

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