[clug] How to connect two Linux boxes? [SEC=UNCLASSIFIED]

[Daniel Pittman]

Brett Worth <brett at worth.id.au> writes:
> Ross.Wilson at ga.gov.au wrote:
>
>> I have an Ubuntu box that is not connected to any network.  There is a
>> large dataset (2TB with the promise of more) on another machine that runs
>> Redhat Server.  This second machine has a running network connection and an
>> unused second network card.
>> 
>> I am trying to connect the two machines so I can transfer the large dataset
>> to the Ubuntu machine.
>
> (I'm sure people will scream in disbelief at this)
>
> Depending on the CPU speed in the two machines you might like to look at
> using rsh instead of ssh for the transfer. i.e. rsync --rsh=rsh

That makes sense, actually: it used to be that I got less than network speed
with encryption at both ends.

[...]

> I think early versions of ssh allowed for encryption to be turned off but I
> don't think current versions allow this.

Using blowfish or AES rather than 3DES is a big gain; that used to be enough
for me to get wire speed on a 100Mbit network.  These days, though, the
network is usually slower than the CPU by enough...

FWIW, though, if I want unencrypted transfer I typically just use netcat and
tar, which does fine and uses raw TCP directly.

Regards,
        Daniel

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