title: SSH Tunneling to docker container
body: <p>I'm trying to establish an ssh tunnel to my docker container running on my remote Virtual Server.</p>
  
  <p>Basically I followed the instruction here on <a href="https://stackoverflow.com/questions/28134239/how-to-ssh-into-docker">this post</a> where you also find more details about what I'm trying to achieve:</p>
  
  <p>Stackoverflow's linked post: <a href="https://stackoverflow.com/questions/28134239/how-to-ssh-into-docker">How to SSH into Docker?</a></p>
  
  <p>Actually I set up everything correctly but my connection is terminated every time with the following message:</p>
  
  <hr>
  
  <pre><code>@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
  @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
  @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
  IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
  Someone could be eavesdropping on you right now (man-in-the-middle attack)!
  It is also possible that a host key has just been changed.
  The fingerprint for the RSA key sent by the remote host is &lt;rsa-key&gt;.
  Please contact your system administrator.
  Add correct host key in /home/rico/.ssh/known_hosts to get rid of this message.
  Offending ECDSA key in /home/rico/.ssh/known_hosts:31 remove with: ssh-keygen -f "/home/rico/.ssh/known_hosts" -R [&lt;server-ip&gt;]:33
  RSA host key for [&lt;server-ip&gt;]:33 has changed and you have requested strict checking.
  Host key verification failed.
  </code></pre>
  
  <hr>
  
  <p>I attached a screenshot here: 
  <a href="https://s18.postimg.org/ivnnxj7a1/connection_closed.png" rel="nofollow noreferrer">https://s18.postimg.org/ivnnxj7a1/connection_closed.png</a></p>
  
  <p>My command line is:</p>
  
  <p><code>ssh -p 33 root@&lt;server-ip&gt;</code></p>
  
  <p>where '33' is the ssh port of the docker container.</p>
  
  <p>What I have to do in order to have the connection accepted by my Virtual Server?</p>
  
  <p><strong>[UPDATE]</strong></p>
  
  <p>run the command adding also -v flag and post the output:</p>
  
  <pre><code>OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014
  debug1: Reading configuration data /etc/ssh/ssh_config
  debug1: /etc/ssh/ssh_config line 19: Applying options for *
  debug1: Connecting to &lt;server-ip&gt; [&lt;server-ip&gt;] port 44.
  debug1: Connection established.
  debug1: identity file /home/rico/.ssh/id_rsa type 1
  debug1: identity file /home/rico/.ssh/id_rsa-cert type -1
  debug1: identity file /home/rico/.ssh/id_dsa type -1
  debug1: identity file /home/rico/.ssh/id_dsa-cert type -1
  debug1: identity file /home/rico/.ssh/id_ecdsa type -1
  debug1: identity file /home/rico/.ssh/id_ecdsa-cert type -1
  debug1: identity file /home/rico/.ssh/id_ed25519 type -1
  debug1: identity file /home/rico/.ssh/id_ed25519-cert type -1
  debug1: Enabling compatibility mode for protocol 2.0
  debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.8
  debug1: Remote protocol version 2.0, remote software version OpenSSH_6.7p1 Debian-5+deb8u3
  debug1: match: OpenSSH_6.7p1 Debian-5+deb8u3 pat OpenSSH* compat 0x04000000
  debug1: SSH2_MSG_KEXINIT sent
  debug1: SSH2_MSG_KEXINIT received
  debug1: kex: server-&gt;client aes128-ctr hmac-sha1-etm@openssh.com none
  debug1: kex: client-&gt;server aes128-ctr hmac-sha1-etm@openssh.com none
  debug1: sending SSH2_MSG_KEX_ECDH_INIT
  debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
  debug1: Server host key: ECDSA &lt;server-mac-address&gt;
  debug1: Host '[&lt;server-ip&gt;]:44' is known and matches the ECDSA host key.
  debug1: Found key in /home/rico/.ssh/known_hosts:32
  debug1: ssh_ecdsa_verify: signature correct
  debug1: SSH2_MSG_NEWKEYS sent
  debug1: expecting SSH2_MSG_NEWKEYS
  debug1: SSH2_MSG_NEWKEYS received
  debug1: SSH2_MSG_SERVICE_REQUEST sent
  debug1: SSH2_MSG_SERVICE_ACCEPT received
  debug1: Authentications that can continue: publickey,password
  debug1: Next authentication method: publickey
  debug1: Offering RSA public key: /home/rico/.ssh/id_rsa
  debug1: Authentications that can continue: publickey,password
  debug1: Offering RSA public key: &lt;my-email&gt;@gmail.com
  debug1: Authentications that can continue: publickey,password
  debug1: Offering RSA public key: &lt;my-email&gt;@gmail.com
  debug1: Authentications that can continue: publickey,password
  debug1: Trying private key: /home/rico/.ssh/id_dsa
  debug1: Trying private key: /home/rico/.ssh/id_ecdsa 
  debug1: Trying private key: /home/rico/.ssh/id_ed25519
  debug1: Next authentication method: password
  root@&lt;server-ip&gt;'s password: 
  </code></pre>
  
  <p>Even if I set up a new root password it doesn't work</p>