I try to establish a reverse ssh tunnel. Until now with no success. The system i want to access is a Edimax BR6104KP with OpenWRT trunk and dropbear and a Huawei E220 G3-modem. I have acess to the internet.
My homesystem is using a AVM Fritzbox 7270 which is also running dropbbear as server with "./dropbear -a -E" From the BR6104KP i can establish a ssh-connection to the Fritzbox with "ssh -l root -R 7722:localhost:22 mydomain.org" I have now access from the BR6104KP to the Fritzbox and can execute commands on the Fritzbox's commandline. But the purpose is to have a reverse tunnel from the Fritzbox at home to the BR6104KP which will installed at a remote location. So i establish the connection with " ssh -l root -f -N -g -R 7722:localhost:80 mydomain.org", i get the password-request and the connection disappears in the background. When i try now to establish this reverse channel from the Fritzbox to the BR6104KP with "./ssh -p 7722 localhost" i get the following : # ./ssh -p 7722 localhost ./ssh: Connection to root@localhost:7722 exited: Remote closed the connection # Any idea what is the problem ? Is it possible to run such a reverse ssh tunnel with dropbear (version 2011.54) as client and server ? Or do i need openssh on the server (Fritzbox) ? Do i need an additional serverdemon who handles port 22 ? I have also tried to forward port 23 (telnetd is running on the BR6104KP) but with same result. Is it possible to forward several ports (e.g. 80 and 22) ? best regards A. Zoeller
