Update dns.md

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Lee Baird 2013-12-05 23:29:39 -05:00
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## Cache snooping
### Cache snooping
host -r www.google.com <nameserverIP>
## Open DNS resolution against a DNS server.
### Open DNS resolution against a DNS server.
Supply a hostname not cached or inside a company owned domain.
nslookup www.nsa.gov <nameserverIP>