Hi Peter,

You want a "null cipher" for the data transport after authentication.
My understanding is that this is possible, but you need to recompile
OpenSSH.

Austin

On 9/27/07, Peter Daum wrote:
> Hi,
>
> ... maybe a little heretic: is there any way to tell ssh to forward data
> without any encryption. (or using some very "light" cipher)?
>
> I am experimenting with a central backup server that will get data from
> many hosts at the same time via rsync+ssh.
> While I am very concerned about access control (thus ssh/public key
> authentification), the data is transfered over a network that can't
> easily be eavesdropped, so the data encryption would be expendable.
> After doing some tests, it looks like the additional CPU load caused
> by data encryption might be too much ...
>
> Regards,
> Peter Daum
>
> P.S.: I had posted this question before; as I just noticed,
> it was rejected with the comment
> "Please tell the list which version and vendor of SSH you are using"
> The machines in question (all Linux) run different versions of openssh
> (version 4.1 ..4.7, Suse, Debian,or self-compiled); I hadn't noticed
> a new option regarding this issue in newer versions ...
>
>