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- Newsgroups: comp.protocols.kerberos
- Path: sparky!uunet!charon.amdahl.com!pacbell.com!decwrl!elroy.jpl.nasa.gov!ames!agate!stanford.edu!SOCRATES.MIT.EDU!bf4grjc
- From: bf4grjc@SOCRATES.MIT.EDU (Ravi Ganesan (301) 595-8439)
- Subject: Re: Local password validation (was: kerberizing xlock)
- Message-ID: <9211051900.AA01169@ramanujam.bell-atl.com>
- Sender: news@shelby.stanford.edu (USENET News System)
- Organization: Internet-USENET Gateway at Stanford University
- References: <9211051538.AA12053@portnoy.MIT.EDU>
- Date: Thu, 5 Nov 1992 19:00:50 GMT
- Lines: 49
-
-
- Barry,
-
- > We have now come full circle. Notice that the subject line in this
- > message contains "was: kerberizing xlock." This entire conversation
- > began because people were discussing using Kerberos for local password
- > authentication, when it was not designed for that purpose.
- >
- > With public workstations (like those you described, and those at MIT's
- > Athena) the spoofability of public workstations is irrelevant.
- > However, when people start talking about using Kerberos for xlock, it
- > is clear that they *do* care about an imposter gaining access to a
- > workstation (particularly given that another user's credentials are
- > already available there). In that case, the spoofing issue becomes
- > highly relevant.
- >
- > So now, I think, the point has been made and everyone understands the
- > issues better. That is, after all, part of the purpose of this
- > mailing list. :-)
- >
- As per my earlier note (perhaps sent only to you), I just want to re-emphasize
- the ground realities of maintaining multiple 'systems' for network
- authentication and host authentication - kerberos WILL end up being used for
- both, and subtelities about which environment it was designed for (anonymous
- workstations - MIT Athena) is nice to know, but is of little pracitcal
- consequence.
-
- I feel that getting a ticket and then getting a service ticket and using that
- service - under the condition the service is on the same machine, is a
- theoretically messy, but practically convenient solution. (To recap a
- hyper-kludgy hyper-quick and hyper-dirty way of doing this would be to
- replace login with a combination of a kinit, a chown on the ticket, and then
- a quick rlogin into the same machine. Naturally in practice you would set
- up a dummy server that does something trivial like retun a YES/No
- repsonse to your login program.
-
- Ravi
- --
-
-
- *******************************************************************************
-
- Ravi Ganesan e-mail: ravi@socrates.bell-atl.com
- IS SAS Corporate Network Planning v-mail: (301) 595-8439
- Bell Atlantic Fax: (301) 595-1341
-
- Note: If your e-mail reply to me bounces, try sending it explicitly to
- ravi@socrates.bell-atl.com instead of using the 'reply' feature.
- ******************************************************************************
-