Trying to create a socks (-D) ssh tunnel - Linux box to Linux box (both centos):
sshd running on remote side ok.
From local machine we do / see this:
ssh -D 1080 email@example.com. firstname.lastname@example.org's password: bind: Cannot assign requested address
(where 220.127.116.11 is really my server's IP and 'user' is my real username)
I am logged into the remote side in this terminal-window. I can verify that the local port was unused prior to this command, and then used by an ssh process, after the command, via:
netstat -lnp | grep 1080
So, unlike most googled-responses with this error, the problem would not seem to be the loopback interface assignment. If I try to use this tunnel with a mail client, the local-side permits the attempt (no 'proxy-failed' error), but no data / reply is returned.
On the remote side, I do have "PermitTunnel yes" in my sshd_config (though 'yes' should be the default, anyway).
Ideas or Clues?
Here is the relevant debug-output
OpenSSH_5.3p1, OpenSSL 1.0.0-fips 29 Mar 2010 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * .... debug1: Authentication succeeded (password). debug1: Local connections to LOCALHOST:1080 forwarded to remote address socks:0 debug1: Local forwarding listening on 127.0.0.1 port 1080. debug1: channel 0: new [port listener] debug1: Local forwarding listening on ::1 port 1080. bind: Cannot assign requested address debug1: channel 1: new [client-session] debug1: Entering interactive session. debug1: Sending environment. debug1: Sending env LANG = en_US.utf8
Other clue: If I run a Virtual Box on the client running Windows, open a tunnel with putty in that box, that tunnel, to the same remote server, works.
Stranger Still" If I use Putty (for linux) running directly on the Linux Client, it does NOT work, even if the settings are an exact duplicate of the putty settings which DO WORK in Putty running on Windows in a Virtual Box on the same Client Machine?? There is something fishy ... still trying experiments to figure out what it is.