[6871] in Kerberos

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Re: kerberos network load

daemon@ATHENA.MIT.EDU (Barry Jaspan)
Tue Mar 12 17:54:04 1996

Date: Tue, 12 Mar 96 17:41:10 EST
From: Barry Jaspan <bjaspan@bbnplanet.com>
To: Patrick Schramboeck <patty@utimaco.co.at>
Cc: kerberos@MIT.EDU
In-Reply-To: [6870]


   Date: Tue, 12 Mar 1996 14:31:50 +0100
   From: Patrick Schramboeck <patty@utimaco.co.at>

   how many pakets needs to be exchanged between
   a kerberos server (KDC) and a client to authenticate? (2 pakets?)

Yes, 2 packets.

   And how many pakets are needed for contacting a file server?
   ( 2 pakets for the TGs and 2 pakets for the fileserver?)

Again, you are correct.  The first time a client wants to contact a
service, it makes a round-trip to the TGS (2 packets, one each way).
Subsequent uses of the same service do not require communicating with
the TGS.

A client and server that wish to perform mutual authentication
exchange two packets.  If the client only needs to authenticate to the
server, only one packet is exchanged.

Barry

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