How to control ciphers used by SSL?

[stan]

On Wed, Jan 22, 2020 at 05:53:12PM +0100, Liam Proven wrote:
> On Wed, 22 Jan 2020 at 16:45, stan <stanb at panix.com> wrote:
> >
> > We are in the process of upgrading a machine that is quite old. One of the
> > major tasks performed by this machine is supporting a fair number of
> > MikroTi's.
> 
> Typo?
> 
> Do you mean MikroTik  routers?

Yes, sorry.
> 
> 
> > This is done by connecting to these devices using a perl module
> > MikroTik::API . When we run the perl script on the newer (18.04) machine,
> > it fails to connect. We believe this is because the ciphers available on
> > the devices are not being used by the newer openssl layer.
> >
> > Does this make sense?
> >
> > If so, how can we add the older ciphers to the list that the SSL layer
> > offers from the Ubuntu machine.
> >
> > FYI, this is on an internal network, so we are not overly concerned about
> > the use of older ciphers.
> >
> > This is done by connecting to a specific port on the devices, not the ssh
> > or https ports.
> 
> You might need to be a bit more specific.
> 
> It works from older versions, you say? But not on 18.04. So, on what
> older versions does it work? Then you need to isolate what versions of
> openssh work and what don't
> 
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