sftp batch mode and interactive passwords

[John Abreau]

On 2/22/07, Dan Ritter <dsr at tao.merseine.nu> wrote:
> On Wed, Feb 21, 2007 at 11:28:18PM -0500, John Abreau wrote:
> > On 2/21/07, Robert La Ferla <robertlaferla at comcast.net> wrote:
> >
> > I believe scp and sftp both use the same backend on the server;
> > it seems odd that one would work and the other not. Any security
> > problem would be with the backend, not with the client end, so
> > blocking scp and enabling sftp is no more secure than enabling
> > both scp and sftp.
>
> SFTP uses the SSH subsystem facility, which runs an external
> binary to accept commands. scp runs a local copy of scp itself
> over an SSH link, much like "scp | ssh target scp".

I poked around google, and found that it was the F-Secure SSH that
implemented scp via the sftp-server facility. Now that I think about it,
I recall fighting with my manager in 2000 to hold off on buying a
bunch of F-Secure licenses until openssh implemented the sftp-server
subsystem.

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John Abreau / Executive Director, Boston Linux & Unix
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