I'm trying to establish an ssh tunnel to my docker container running on my remote Virtual Server.
Basically I followed the instruction here on this post where you also find more details about what I'm trying to achieve:
Stackoverflow's linked post: How to SSH into Docker?
Actually I set up everything correctly but my connection is terminated every time with the following message:
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@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
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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 <rsa-key>.
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 [<server-ip>]:33
RSA host key for [<server-ip>]:33 has changed and you have requested strict checking.
Host key verification failed.
I attached a screenshot here: https://s18.postimg.org/ivnnxj7a1/connection_closed.png
My command line is:
ssh -p 33 root@<server-ip>
where '33' is the ssh port of the docker container.
What I have to do in order to have the connection accepted by my Virtual Server?
[UPDATE]
run the command adding also -v flag and post the output:
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 <server-ip> [<server-ip>] 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->client aes128-ctr hmac-sha1-etm@openssh.com none
debug1: kex: client->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 <server-mac-address>
debug1: Host '[<server-ip>]: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: <my-email>@gmail.com
debug1: Authentications that can continue: publickey,password
debug1: Offering RSA public key: <my-email>@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@<server-ip>'s password:
Even if I set up a new root password it doesn't work