I have been given a server to use for some computations. I have been given the root password and they told me to create an account for myself.
I accessed the server using
and inputing the root password. I then created an user with
sudo useradd -m myname and set a password. Then I logout, and tried to ssh doing
Immediately after I insert my password, though, my connections gets closed:
Connection to host closed by remote host. Connection to host closed.
I tried looking into the host.deny and host.allow files, but they don't seem to be modified (they are commented out with #)
Then I tried looking into
etc/ssh/sshd_config, but I don't know exactly what to look for. These are some of the parameters that seem relevant:
# Authentication: LoginGraceTime 120 PermitRootLogin yes StrictModes yes RSAAuthentication yes PubkeyAuthentication yes #AuthorizedKeysFile %h/.ssh/authorized_keys # Don't read the user's ~/.rhosts and ~/.shosts files IgnoreRhosts yes # For this to work you will also need host keys in /etc/ssh_known_hosts RhostsRSAAuthentication no # similar for protocol version 2 HostbasedAuthentication no # Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication #IgnoreUserKnownHosts yes # Change to no to disable tunnelled clear text passwords #PasswordAuthentication yes
What could be the problem? Note that I am not trying to login using ssh-keys, inserting the password is fine. How can I make that work?
Edit This is the content of the whole sshd_config file:
# Package generated configuration file # See the sshd_config(5) manpage for details # What ports, IPs and protocols we listen for Port 22 # Use these options to restrict which interfaces/protocols sshd will bind to #ListenAddress :: #ListenAddress 0.0.0.0 Protocol 2 # HostKeys for protocol version 2 HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_dsa_key HostKey /etc/ssh/ssh_host_ecdsa_key HostKey /etc/ssh/ssh_host_ed25519_key #Privilege Separation is turned on for security UsePrivilegeSeparation yes # Lifetime and size of ephemeral version 1 server key KeyRegenerationInterval 3600 ServerKeyBits 1024 # Logging SyslogFacility AUTH LogLevel INFO # Authentication: LoginGraceTime 120 PermitRootLogin yes StrictModes yes RSAAuthentication yes PubkeyAuthentication yes #AuthorizedKeysFile %h/.ssh/authorized_keys # Don't read the user's ~/.rhosts and ~/.shosts files IgnoreRhosts yes # For this to work you will also need host keys in /etc/ssh_known_hosts RhostsRSAAuthentication no # similar for protocol version 2 HostbasedAuthentication no # Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication #IgnoreUserKnownHosts yes # To enable empty passwords, change to yes (NOT RECOMMENDED) PermitEmptyPasswords no # Change to yes to enable challenge-response passwords (beware issues with # some PAM modules and threads) ChallengeResponseAuthentication no # Change to no to disable tunnelled clear text passwords #PasswordAuthentication yes # Kerberos options #KerberosAuthentication no #KerberosGetAFSToken no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes # GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes X11Forwarding yes X11DisplayOffset 10 PrintMotd no PrintLastLog yes TCPKeepAlive yes #UseLogin no #MaxStartups 10:30:60 #Banner /etc/issue.net # Allow client to pass locale environment variables AcceptEnv LANG LC_* Subsystem sftp /usr/lib/openssh/sftp-server # Set this to 'yes' to enable PAM authentication, account processing, # and session processing. If this is enabled, PAM authentication will # be allowed through the ChallengeResponseAuthentication and # PasswordAuthentication. Depending on your PAM configuration, # PAM authentication via ChallengeResponseAuthentication may bypass # the setting of "PermitRootLogin without-password". # If you just want the PAM account and session checks to run without # PAM authentication, then enable this but set PasswordAuthentication # and ChallengeResponseAuthentication to 'no'. UsePAM yes
Here is the output of the connection attempt with
ssh -vv username@host
OpenSSH_7.2p2 Ubuntu-4ubuntu2.2, OpenSSL 1.0.2g 1 Mar 2016 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug2: resolving "host_name" port 22 debug2: ssh_connect_direct: needpriv 0 debug1: Connecting to host_name [ip_address] port 22. debug1: Connection established. debug1: key_load_public: No such file or directory debug1: identity file /localhome/username/.ssh/id_rsa type -1 debug1: key_load_public: No such file or directory debug1: identity file /localhome/username/.ssh/id_rsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /localhome/username/.ssh/id_dsa type -1 debug1: key_load_public: No such file or directory debug1: identity file /localhome/username/.ssh/id_dsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /localhome/username/.ssh/id_ecdsa type -1 debug1: key_load_public: No such file or directory debug1: identity file /localhome/username/.ssh/id_ecdsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /localhome/username/.ssh/id_ed25519 type -1 debug1: key_load_public: No such file or directory debug1: identity file /localhome/username/.ssh/id_ed25519-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.2 debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2p2 Ubuntu-4ubuntu2.2 debug1: match: OpenSSH_7.2p2 Ubuntu-4ubuntu2.2 pat OpenSSH* compat 0x04000000 debug2: fd 5 setting O_NONBLOCK debug1: Authenticating to host_name:22 as ‘username_on_server’ debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: local client KEXINIT proposal […] debug1: Server host key: [serverkey] debug1: Host 'host_name' is known and matches the ECDSA host key. debug1: Found key in /localhome/username/.ssh/known_hosts:5 debug2: set_newkeys: mode 1 debug1: rekey after 134217728 blocks debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug2: set_newkeys: mode 0 debug1: rekey after 134217728 blocks debug1: SSH2_MSG_NEWKEYS received debug2: key: /localhome/username/.ssh/id_rsa ((nil)) debug2: key: /localhome/username/.ssh/id_dsa ((nil)) debug2: key: /localhome/username/.ssh/id_ecdsa ((nil)) debug2: key: /localhome/username/.ssh/id_ed25519 ((nil)) debug1: SSH2_MSG_EXT_INFO received debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512> debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey,password debug1: Next authentication method: publickey debug1: Trying private key: /localhome/username/.ssh/id_rsa debug1: Trying private key: /localhome/username/.ssh/id_dsa debug1: Trying private key: /localhome/username/.ssh/id_ecdsa debug1: Trying private key: /localhome/username/.ssh/id_ed25519 debug2: we did not send a packet, disable method debug1: Next authentication method: password username_on_server@host_name's password: <——- Here I inserted my password debug2: we sent a password packet, wait for reply debug1: Authentication succeeded (password). Authenticated to host_name ([ip_address]:22). debug1: channel 0: new [client-session] debug2: channel 0: send open debug1: Requesting email@example.com debug1: Entering interactive session. debug1: pledge: network debug1: channel 0: free: client-session, nchannels 1 Connection to host_name closed by remote host. Connection to host_name closed. Transferred: sent 1736, received 1388 bytes, in 0.0 seconds Bytes per second: sent 9760471.5, received 7803879.3 debug1: Exit status -1
Edit 3 the .profile of the new user on the server
# if running bash if [ -n "$BASH_VERSION" ]; then # include .bashrc if it exists if [ -f "$HOME/.bashrc" ]; then . "$HOME/.bashrc" fi fi # set PATH so it includes user's private bin directories PATH="$HOME/bin:$HOME/.local/bin:$PATH"