Re: CRIME Port scanning from an ISP

From: Crispin Cowan (crispin@private)
Date: Wed May 28 2003 - 17:08:04 PDT

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    It seems like a good concept and a bad implementation:
    
        * Good concept: it's one way to reject spam. Do a real-time test of
          the sending SMTP node to see if it is an open relay.
        * Bad implementation: you don't need to /repeatedly/ do this scan,
          you can cache results and do it occasionally.
    
    Andrew implies that XXXXX is practically DoS'ing him with massive port 
    scans. Is it perhaps the case that XXXXX is just port-scanning Anitian 
    once per mail that Anitian sends XXXXX?
    
    Philosophy: never ascribe to malice that which can be explained by 
    stupidity.
    
    With that in mind, the fact that Anitian is sending mail to XXXXX only 
    in the form of bounces generated by spam oritinating from XXXXX is 
    actually beside the point, if just a little ironic :-)
    
    Crispin
    
    -- 
    Crispin Cowan, Ph.D.           http://immunix.com/~crispin/
    Chief Scientist, Immunix       http://immunix.com
                http://www.immunix.com/shop/
    



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