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How to implement your own WHOIS server?

How do you get WHOIS information first?

Note that I'm not really going to do this; I'm just wondering how this will work!

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Just implement the whois protocol http://tools.ietf.org/html/rfc3912

You receive a request, you view it in your database and send your response. It. Take a look at an example:

   open TCP   ---- (SYN) ------------------------------>
              <---- (SYN+ACK) -------------------------
   send query ---- "Smith<CR><LF>" -------------------->
   get answer <---- "Info about Smith<CR><LF>" ---------
              <---- "More info about Smith<CR><LF>" ----
   close      <---- (FIN) ------------------------------
              ----- (FIN) ----------------------------->

How to create your own database, it depends on what information you want to provide.

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This, as far as I know, is a very big question.

DNS DNS . , " " ( , google, verizon ..) .

DNS-. , - $1000 .

, http://whois.domaintools.com -.

, whois IP. . , whois lookups , .

"" DNS, , $50 .

, "", .

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