nanog mailing list archives
RE: Detecting a non-existent domain
From: alex () yuriev com
Date: Fri, 26 Sep 2003 12:22:06 -0400 (EDT)
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.
Alg 101 1. Seed the isWildCard[] probability array. Generate N random strings. Attach ".NET" or ".COM" to them. Get records for them. Compare records to each other assigning them probability of being a wildcard based on the repetitiveness of the data. 2. Query domain name in question. Compare the result with isWildCard[] probability array. Alex
Current thread:
- RE: Detecting a non-existent domain, (continued)
- RE: Detecting a non-existent domain Kee Hinckley (Sep 23)
- RE: Detecting a non-existent domain David Schwartz (Sep 23)
- Re: Detecting a non-existent domain Daniel Roesen (Sep 23)
- Re: Detecting a non-existent domain Jack Bates (Sep 23)
- RE: Detecting a non-existent domain David Schwartz (Sep 23)
- Re: Detecting a non-existent domain Daniel Roesen (Sep 23)
- Re: Detecting a non-existent domain Joe Abley (Sep 23)
- RE: Detecting a non-existent domain Kee Hinckley (Sep 23)
- RE: Detecting a non-existent domain David Schwartz (Sep 23)
- Message not available
- Re: Detecting a non-existent domain Kee Hinckley (Sep 24)
- RE: Detecting a non-existent domain alex (Sep 26)