question regarding port forwarding with dropbear

[Smith Kennedy]

Hello,

I have a router that is running dropbear for an ssh server.  I am  
trying to use dropbear for "listener port forwarding" , but so far I  
am not able to do so.  I am using the following arguments to the  
"ssh" command:

ssh -g -N -R 9777:localhost:9778 foo at null.bitbucket.org

If the "-g" argument is provided to ssh, and the sshd at the other  
end is the OpenSSH sshd, and its sshd_config file contains the  
"GatewayPorts yes" directive, then sshd on the remote host will begin  
listening on port 9777, forwarding any connections over the tunnel to  
port 9778 on the machine at the other end of the tunnel, and it all  
works.  If this directive is missing then sshd will only listen on  
port 9777 for the loopback address (localhost:9777) instead of on all  
interfaces (*:9777), which defeats the purpose of the exercise.

The corresponding argument for dropbear seems to be omitting the "-k"  
argument when starting dropbear.  However, dropbear isn't being  
started with that argument.

Is there something additional I need to do, or is this just a  
deficiency with dropbear?

Thanks for any info,
Smith