From: gah@ugcs.caltech.edu   
      
   Barry Margolin  wrote:   
   > In article ,   
   > Hongyi Zhao  wrote:   
      
   (big snip)   
      
   >> Is there any quick and accurate method for this purpose?  Any hints   
   >> will be highly appreciated.  Thanks in advance.   
      
   > You could do reverse lookups, and check for hostnames   
   > ending in .edu, .edu., or .ac..   
      
   and then, in Sun tradition, do the forward lookup and verify   
   that one of the returned addresses is the one you started with.   
      
   That verifies that nameservers belonging to the host instititution   
   actually agree with the reverse.   
      
   Otherwise, I can put any value in my PTR records, and pretend   
   to be an academic institution.   
      
   -- glen   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)