We allow access only via port 22 by using a firewall.

"Jerry L. Kazdan" wrote:
> 
> Background:
>   Our VNC server is a Linux computer.  Most users come from Windows
> using SecureCRT for ssh connections.  While users can easily get a
> secure connection using SecureCRT (we already configured this), they
> can also connect and use VNC using an insecure connection.
> 
> ==> How can we restrict clients running Windows to ONLY secure
> connections?
> 
> We should also solve this for clients on Macs.  Note that I think this
> sort of restriction is already possible to enforce for clients on
> other Unix computers.
> 
> The issue is critical since beginning in September, we will have a
> campus-wide policy of not allowing insecure connections to our
> servers. Thus, unless we solve the problem, VNC will become
> disallowed.
> 
>         Thanks,
>         Jerry
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