My guess is it's the windows firewall.

On Thu, Jan 6, 2011 at 23:22, Bryan O'Neal <
Bryan.ONeal@theonealandassociates.com> wrote:

> So I have a windows boxes (Hence why this is OT) using openSSH server
> via cygwin. But when I try and do port forwarding to this box I get a
> nasty error. Let me be specific
>
> I set up the forward fine
> ssh -f user@remote.host -p ssh_listning_port -L
> local_forward_port:remote.host:destination_port -N
>
> So that works fine, but when I go to actually use the tunnel I get
>
> channel 2: open failed: connect failed: Operation not permitted
>
> What up?  The server has AllowTcpForwarding yes
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