Re: [Fwd: [Asrg] Re: Documents for LMAP BOF]

On Sun, Feb 08, 2004 at 07:45:07PM -0500, Yakov Shafranovich wrote:
> 
> What I still do not understand with reputation and accreditation 
> services is why the same concept of "reject from unknown domains" cannot 
> be applied to IP addresses. The same way in a LMAP world we can reject 
> email or filter it because of lack of reputation or accreditation, can 
> be done with IP addresses, without a need for any protocol changes.

Well, in principle it would be possible, but imho not advisable for 
several reasons:


- Remember the example I've given with @danisch.de. We are talking
  about e-mail and senders, and we currently base e-mail addresses 
  on domain names, not on IP addresses. domain space is the more
  important address space compared to IP address space.

- You register for a domain. You don't register for IP addresses. 

- IP addresses are far to volatile. Dynamicly assigned IP addresses
  (dhcp, ppp,...) can change within seconds. Domains don't.


This doesn't make it impossible to use IP addresses for reputation,
but quite difficult.

regards
Hadmut