SSH authentication bypass?

[Tom Buskey]

There was an interesting thing around 1999 called DXPC.  Where SSH -X -c
would compress the bits between the X11 server and client, DXPC would
convert the protocol at either end before it went through SSH.  It was a
*much* greater speed up then -c was.  I think it got consumed into other
projects (NX?).

I've used rsync instead of scp to speed up repeat copies of small files.
It gets negated if it takes too long to crawl the file system, or  large
individual files changing or most files changing.  But if you have only a
few files changing, it's a good replacement.


On Fri, Jun 27, 2014 at 2:39 PM, Kevin D. Clark <kevin_d_clark at comcast.net>
wrote:

>
> Tom Buskey writes:
>
> > There was a neat article in Linux Journal (?) that compared
> > compression/decompression time, bandwidth, data compressibility and cpu
> > speed.
>
> Thank you very much for the very interesting article.
>
> Back when I was playing around with the HPN SSH, I was sort-of
> guessing that HPN SSH would improve my "scp" performance by making
> improvements in the area of buffer-management and flow-control.  I
> thought this was the most likely place where things could be improved.
>
>    (I thought this was a reasonable guess, since I was
>     copying files across an entire continent....)
>
> Unfortunately, my initial results weren't really any different from
> unpatched-SSH.  Soon afterwards I migrated to a new project where I
> didn't need to use "scp" nearly as much, so I didn't get to play
> around with this much more .  I would have found it interesting to
> muck around in this area a bit more.  Ah, well...
>
> The only point I'm trying to make here is that these patches are very
> interesting, but they might not be a silver bullet...
>
> Regards,
>
> --kevin
> --
> alumni.unh.edu!kdc / http://kdc-blog.blogspot.com/
> GnuPG: D87F DAD6 0291 289C EB1E 781C 9BF8 A7D8 B280 F24E
>
> And the Army Ants, they leave nothin' but the bones...
>    -- Tom Waits
>
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