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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: Detecting a non-existent domain
At 3:15 PM -0700 9/23/03, David Schwartz wrote: How would you do this before? Does an A record for a hostname mean that aOkay, let's be very specific. I need to know if a given name has either A or MX records which are *not* the same as those provided by the a wildcard in the appropriate TLD. The answer so far seems to be to query *.TLD, nab all the records, and then compare them all the results you get back from querying the domain. If there is anything that doesn't match, you are in the clear. (Modulo internal networks and localhost and all those fun tricks of course--but that's a different problem.) The fact that this is a single IP comparison with Verisign today presumably does not preclude the wonders of MX records, CNAME's, multiple A records and all of that in the future. -- Kee Hinckley http://www.messagefire.com/ Next Generation Spam Defense http://commons.somewhere.com/buzz/ Writings on Technology and Society I'm not sure which upsets me more: that people are so unwilling to accept responsibility for their own actions, or that they are so eager to regulate everyone else's.
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