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Re: maybe a dumb idea on how to fix the dns problems i don't know....

  • From: Chris Paul
  • Date: Sun Aug 10 17:53:07 2008



[email protected] wrote:
(I know; you old folks that created this wonderful thing didn't think of that back then.... blah blah blah).

If they had thought of it back then, they would have allowed for a larger TXID, not used TCP. TCP connection setup time is slow; TCP DNS is much slower than UDP DNS.
Good point.

But we only care about TCP connection setup time in *interactive* sessions (a human using something like the web). If you have a persistent connection to your dns server from your dns resolver on your browser machine, you just send the request.... no TCP setup there at all. You can even pool connections. We do this stuff in LDAP all the time.

How does TCP resolution work in most resolver libraries? A TCP connection for each lookup? That is kind of dumb isn't it, speaking of dumb.... I actually don't know. Not much of a coder, so I'll let you coders check your code and get back to me on that...

well.. maybe i'll fire up snort or wireshark and check it out later with some different dns libs....

CP
--
Chris Paul
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