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000261_fdc@columbia.edu_Fri Aug 2 12:56:21 EDT 2002.msg
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Article: 13577 of comp.protocols.kermit.misc
Path: newsmaster.cc.columbia.edu!news.columbia.edu!news-not-for-mail
From: fdc@columbia.edu (Frank da Cruz)
Newsgroups: comp.unix.aix,comp.protocols.kermit.misc
Subject: Re: Secure resumable file transfer on AIX
Date: 2 Aug 2002 12:55:41 -0400
Organization: Columbia University
Lines: 56
Message-ID: <aiedid$ks1$1@watsol.cc.columbia.edu>
References: <97n29.21591$vg.830729@bin2.nnrp.aus1.giganews.com> <aie5h3$jag$1@watsol.cc.columbia.edu> <aieces$nag$1@samba.rahul.net>
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Xref: newsmaster.cc.columbia.edu comp.unix.aix:238375 comp.protocols.kermit.misc:13577
In article <aieces$nag$1@samba.rahul.net>, <dold@06.usenet.us.com> wrote:
: : In article <97n29.21591$vg.830729@bin2.nnrp.aus1.giganews.com>,
: : George Saylor <gmsayloriii@comcast.net> wrote:
: : : We have a requirement to copy moderate sized files ( up to 1.5 GB) over
: : : a WAN between two H80's 1000 miles apart. I am trying to find a good
: : : product that supports AIX and can perform resumable file transfers,
: : : compression is a plus, and secure is a guaranteed sale...The whole
: : : operation must be non-interactive of course.
:
: In comp.protocols.kermit.misc Frank da Cruz <fdc@columbia.edu> wrote:
: : C-Kermit:
:
: : http://www.columbia.edu/kermit/ckermit.html
:
: : . It can perform resumable transers.
: : . It does compression on the fly when you use Kermit protocol.
: : . You have your choice of Kerberos, SSL/TLS, or SRP security.
: : . It is fully scriptable using its own built-in scripting language.
:
: Easily scriptable. The simple task of resumable transfers is so
: automatic, I don't really consider it scripting. More like a batch file.
:
: The automatic compression is not intense. I wouldn't compare it to
: zip/unzip. When I was transferring a 20-30MB file on a 14400 line,
: I made zip/unzip part of the script at each end.
:
True, Kermit protocol compression is usually not as effective a zip or
gzip, but C-Kermit lets you use compression/decompression (or any other
kind of) filters on either end of the transfer, so you can use your
favorite utility in the pipeline to compress/decompress on the fly. See:
http://www.columbia.edu/kermit/ckermit70.html#x4.2
This is true for both Kermit protocol and FTP transfers (except of course
there the ability of an FTP server to compress or decompress using the
same method -- such as gzip/gunzip -- depends on the server).
Also, I forgot to mention previously that you can find out about secure
FTP servers here:
http://www.columbia.edu/kermit/security.html#servers
: Unattended? I never noticed the kermit part of the process at all. The
: batch job that created the file at one end invoked kermit as its final
: step. At the other end, when the file appeared, it was processed. At
: one end, the guy would load a tape on a PC-based tape reader, and walk
: out the door for the evening as soon as the zip started. His only concern
: was a good tape read. At the other end, it just fell in to the process
: flow... no one noticed when.
:
: I've used Kermit on AIX, Solaris, Linux, DOS and Windows95+
: interchangeably, with perfect interoperability.
:
Another satisfied customer :-)
- Frank