Here are the examples Dr. A gave inclass

(some of these are Linux, others are Windows)

NetCat

nc -v www.scotnpatti.com 80
    HEAD / HTTP/1.0 (press enter)
       (press enter)

FTP

www.scotnpatti.com   (bad)
www.cs.southern.edu  (good)

SMTP

telnet email.scotnpatti.com
    vrfy root
    vrfy scot
    vrfy jane

DNS

dig @peter.cs.andrews.edu southern.edu axfr

BindVersion

dig @ns1.swau.edu version.bind txt chaos

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