If you have open ports you cannot restrict ssh tunnels or port
forwarding within a SSH connection at the gateway as the communication
is encrypted. The gateway / firewall will only see SSH traffic.

To restrict tunnels you need to block ingress and egress traffic, and
only provide web access over a proxy that does SSL mitm and looks for
ssh over HTTP.

In most cases forcing use of proxy and blocking direct access to
external hosts will be enough.

On Fri, Jul 27, 2012 at 6:46 PM, a bv <vbavbalist (at) gmail (dot) com [email concealed]> wrote:
> Hi,
>
> How can i prevent reverse ssh tunnels?
>

--
Regards,

Peter
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