[X2Go-User] ssh-keygen.exe loads the processor every time the client starts

[Ulrich Sibiller]

On Fri, Oct 6, 2017 at 3:12 AM, Mihai Moldovan <ionic at ionic.de> wrote:
>
> On 09/28/2017 01:49 PM, Max A. wrote:
> > I'm using a x2go server on CentOS 6.9 (the latest version from EPEL,
> > 4.0.1.20), clients use Windows XP/7 and the latest version of X2Go
> > Client (4.1.0.0-2017.03.11). Each time the client connects,
> > ssh-keygen.exe (C:\Program Files\x2goclient\ssh-keygen.exe) starts with
> > the parameters "-t rsa -b 4096 -N" "-C" X2Go Client RSA user key "-f C:

> I explicitly decided against that. For more information and the rationale for
> this change, refer to the release announcement:
> http://lists.x2go.org/pipermail/x2go-announcements/2017/000302.html

The release announcement talks about 2048-bit keys being generated
while this indicates that even stronger keys are being used (which in
turn increases the time to create them). I think for slow clients this
is too much. At least the admin should be able to decide about the
required security, not the maintainer.

So what about staying as is by default but providing a possibility to
pre-generate keys for those connections.

Uli