Like Whois, Dns Server may also be helpful to hackers.
nslookup www.example.net
give out the name server and it's address.
But host command is more useful. '-t' option can get all types of info on dns about a domain name, and '-l' followed dnserver get more.
To forbiden compute except dnserver transfer dns infomation is useful to defend
Technorati Tags: Hacking Linux Exposed, DNS Issues
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