Can't SSH to Debian VM from Ubuntu

burakcan.yurttutan

I can't connect to Debian 9 Server from Ubuntu OS.

  • Debian 9 is a Virtualbox VM.
  • I modified sshd_configand added new user server1on deb server .
  • The Openssh server is setup on the deb server.
  • Deb server is listening on 0.0.0.0 and -p 22.

Although the password is correct, the ssh result is permission denied (public key, password). Shared at:

ssh [email protected] -p22
[email protected]'s password: 
Permission denied, please try again.
[email protected]'s password: 
Permission denied, please try again.
[email protected]'s password: 
[email protected]: Permission denied (publickey,password).

Here is the output of ssh :-vvv [email protected] -p 22

OpenSSH_7.6p1 Ubuntu-4, OpenSSL 1.0.2n  7 Dec 2017
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: resolving "0.0.0.0" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to 0.0.0.0 [0.0.0.0] port 22.
debug1: Connection established.
debug1: identity file /home/oem/.ssh/id_rsa type 0
debug1: key_load_public: No such file or directory
debug1: identity file /home/oem/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/oem/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/oem/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/oem/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/oem/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/oem/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/oem/.ssh/id_ed25519-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.6p1 Ubuntu-4
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.6p1 Ubuntu-4
debug1: match: OpenSSH_7.6p1 Ubuntu-4 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 0.0.0.0:22 as 'server1'
debug3: hostkeys_foreach: reading file "/home/oem/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/oem/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from 0.0.0.0
debug3: order_hostkeyalgs: prefer hostkeyalgs: [email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
debug3: send packet: type 20
debug1: SSH2_MSG_KEXINIT sent
debug3: receive packet: type 20
debug1: SSH2_MSG_KEXINIT received
debug2: local client KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-info-c
debug2: host key algorithms: [email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected],ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected],zlib
debug2: compression stoc: none,[email protected],zlib
debug2: languages ctos: 
debug2: languages stoc: 
debug2: first_kex_follows 0 
debug2: reserved 0 
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1
debug2: host key algorithms: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected]
debug2: compression stoc: none,[email protected]
debug2: languages ctos: 
debug2: languages stoc: 
debug2: first_kex_follows 0 
debug2: reserved 0 
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none
debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:xVQZIxZP0JGTiAFMWvMltdPTQCeJQQXb/p2MQXAP6UU
debug3: hostkeys_foreach: reading file "/home/oem/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/oem/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from 0.0.0.0
debug1: Host '0.0.0.0' is known and matches the ECDSA host key.
debug1: Found key in /home/oem/.ssh/known_hosts:1
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: receive packet: type 21
debug1: SSH2_MSG_NEWKEYS received
debug2: set_newkeys: mode 0
debug1: rekey after 134217728 blocks
debug2: key: /home/oem/.ssh/id_rsa (0x56096d8bd120), agent
debug2: key: /home/oem/.ssh/id_dsa ((nil))
debug2: key: /home/oem/.ssh/id_ecdsa ((nil))
debug2: key: /home/oem/.ssh/id_ed25519 ((nil))
debug3: send packet: type 5
debug3: receive packet: type 7
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521>
debug3: receive packet: type 6
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug3: send packet: type 50
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password
debug3: start over, passed a different list publickey,password
debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering public key: RSA SHA256:k2F5+BpgoHQ5CKiyF+R/5Q5pFsvTXnHWGcMAC0cPBfs /home/oem/.ssh/id_rsa
debug3: send_pubkey_test
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password
debug1: Trying private key: /home/oem/.ssh/id_dsa
debug3: no such identity: /home/oem/.ssh/id_dsa: No such file or directory
debug1: Trying private key: /home/oem/.ssh/id_ecdsa
debug3: no such identity: /home/oem/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: /home/oem/.ssh/id_ed25519
debug3: no such identity: /home/oem/.ssh/id_ed25519: No such file or directory
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
debug1: Next authentication method: password
[email protected]'s password:
telecommunications

Because you're using an IP address of 0.0.0.0, you're not actually connecting to a Debian server, but back to a system starting with Ubuntu - you're actually doing the equivalent ssh localhost.

If a server reports its IP address as 0.0.0.0, it means that the server's network interface has not been configured and is not yet available. You should probably use the VirtualBox console to access the Debian system and check its network configuration.

The first line is the local version string of the SSH client:

OpenSSH_7.6p1 Ubuntu-4, OpenSSL 1.0.2n  7 Dec 2017

Once the connection is established and the SSH client has loaded the key file, it will report the remote endpoint's version string:

debug1: Remote protocol version 2.0, remote software version OpenSSH_7.6p1 Ubuntu-4

Pay attention to what it says Ubuntu-4. When connected to the latest Debian 9 system (as of today), the remote version report should look like this:

debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4p1 Debian-10+deb9u3

This shows that you are connecting to an Ubuntu system, not a Debian system.

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