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000331_peter@taronga.com_Tue Jan 29 17:01:50 EST 2002.msg
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Article: 13169 of comp.protocols.kermit.misc
Path: newsmaster.cc.columbia.edu!panix!nycmny1-snh1.gtei.net!cpk-news-hub1.bbnplanet.com!news.gtei.net!news.maxwell.syr.edu!newsfeed.stanford.edu!news.kjsl.com!news.usenet2.org!citadel.in.taronga.com!not-for-mail
From: peter@taronga.com (Peter da Silva)
Newsgroups: alt.sys.pdp10,alt.folklore.computers,comp.protocols.kermit.misc
Subject: Re: Internet Kermit Service (was Serving non-MS-word *.doc files)
Date: 29 Jan 2002 19:35:17 GMT
Organization: TSS Inc.
Lines: 49
Message-ID: <a36thl$1dli$1@citadel.in.taronga.com>
References: <3C4A7DF8.2AEC4BD7@trailing-edge.com> <a36m5k$79l$1@watsol.cc.columbia.edu> <a36n8d$1a64$1@citadel.in.taronga.com> <a36pti$2cv$1@watsol.cc.columbia.edu>
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NNTP-Posting-Date: 29 Jan 2002 19:35:17 GMT
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Xref: newsmaster.cc.columbia.edu alt.sys.pdp10:21140 alt.folklore.computers:288173 comp.protocols.kermit.misc:13169
In article <a36pti$2cv$1@watsol.cc.columbia.edu>,
Frank da Cruz <fdc@columbia.edu> wrote:
>In article <a36n8d$1a64$1@citadel.in.taronga.com>,
>Peter da Silva <peter@taronga.com> wrote:
>: In article <a36m5k$79l$1@watsol.cc.columbia.edu>,
>: Frank da Cruz <fdc@columbia.edu> wrote:
>: > http://www.columbia.edu/kermit/wiksduser.html
>: Does this support non-reusable tokens for authentication?
>: If so, do you have a scriptable client for it that will run as a
>: service...
>It runs as a service in Windows NT, 2000, and XP.
The client? So I can have it wake up at o-dark-hundred and copy some files
between two boxes over a single well-known port?
> Kerberos 4 and 5
> NTLM
> SRP
How about RSA/DSA public keys or equivalent? Kerberos and NTLM require more
connectivity between the boxes... if I had an unfiltered connection between
the boxes I'd just use Lan Mangler with NTLM authentication.
> http://www.columbia.edu/kermit/security.html
The advantage of RSA authentication is that you don't need to have a
third trusted host that both systems can independently connect to.
Also, if each public/private key pair is only used between one pair of
computers, as in this scenario, revocation is easy. There's only one
system that has the public key that needs to have it removed. Of course
this could equally well be done using symmetrical encryption with a
shared secret, so we're not taking advantage of the full capabililties
of public key authentication... we're just taking advantage of the fact
that the protocol is implemented in a lot of places so we don't have to
reinvent the wheel.
And, of course, we *don't* fully trust the remote box. We only let it access
files in a specific subset of the file tree that's not trusted for general
use.
--
Rev. Peter da Silva, ULC. WWFD?
"Be conservative in what you generate, and liberal in what you accept"
-- Matthew 10:16 (l.trans)