Prob with remote port forwarding ( ssh -R)
I'm using putty to connect to Ubuntu 7.04 w/ latest updates etc...
I'm trying to setup remote port forwarding (reverse tunneling), I have previously used Client to server forwarding.
from Putty's connection log
2007-08-09 16:09:53 Attempting to forward remote port to 127.0.0.1:4524
2007-08-09 16:09:53 Forwarded port opened successfully
2007-08-09 16:09:53 Forwarded port closed
from /var/log/auth.log:
Aug 9 16:08:19 zim sshd[4900]: error: bind: Address already in use
from /etc/ssh/
#allow server to client forwarding
GatewayPorts yes
AllowTcpForwarding yes
For testing Im using netcat on the client machine with
'nc -l -p 4524'
I'm able to connect to it locally w/ telnet to verify it is listenting.
the error in auth.log seems to show up as soon as the tunnel is configured
in putty i'm using
a Remote forwarding with 4524 and 127.0.0.1:4524 for the endpoints.
I do have the 'Remote port responds to other hosts' checked.
Also, Port 4524 doesn't show when I run nmap on the server... (I'm not sure if it is ever supposed to with Remote forwarding)
I've tried a variety of things using putty, I've been able to make client to server forwarding work fine. But never in reverse.
I Believe there is some network config issue on my Server, I just don't know what it is.
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