mail service with no mx (was - Re: Computer systems blamed for feeble hurricane response?)

Wed Sep 14 06:09:54 UTC 2005

>> Application layer firewalls have existed for at least 6 years.
>>
> Make that 15....

I suspect that claiming to that they existed farther back than 1990 would 
require careful debate about the functionality.

Taking it at its most general: a boundary barrier service that mediated 
particular application exchanges between an "interior" Administrative 
Environment, versus the rest of the public network.  One can reasonably argue 
than any such mediation has a security component to it.

Therefore one could argue that firewall functionality was around at least 25 
years ago -- there were a number of email boundary gateway mediating services 
by then -- and very probably back to 1973.  (I just know that some MIT type is 
going to claim pre-1970, given the generality of the definition I offered.)

d/
-- 

  Dave Crocker
  Brandenburg InternetWorking
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