[14203] in Athena Bugs

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Re: telnetd: spurious "You must use the encryption option"

daemon@ATHENA.MIT.EDU (Greg Hudson)
Tue Feb 20 12:45:22 1996

To: brlewis@MIT.EDU
Cc: Greg Hudson <ghudson@MIT.EDU>, bugs@MIT.EDU
In-Reply-To: Your message of "Tue, 20 Feb 1996 10:23:41 EST."
             <9602201523.AA29836@joy.MIT.EDU> 
Date: Tue, 20 Feb 1996 12:45:17 EST
From: Greg Hudson <ghudson@MIT.EDU>

>>Please explain what's wrong with the protocol such that timeouts are
>>needed before forking login.  Shouldn't telnetd simply initiate
>>request for authentication and encryption, and wait for the response?

> I don't know whether to call this a problem with the protocol.  If
> one were to augment the protocl to get around this problem, one
> would need to add something like "ENCRYPT WONT START".  If a client
> supports encryption, there's no way to know when/if it will actually
> begin encrypting its output (telnetd's input).

What happens if the server sends "DO ENCRYPT" to the client?


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