Me han dado un servidor para usar para algunos cálculos. Me dieron la contraseña de root y me dijeron que creara una cuenta para mí.
Accedí al servidor usando ssh root@host
e ingresando la contraseña de root. Luego creé un usuario con sudo useradd -m myname
y establecí una contraseña. Luego me desconecté e intenté hacer sshssh myname@host
Sin embargo, inmediatamente después de insertar mi contraseña, mis conexiones se cierran:
Connection to host closed by remote host.
Connection to host closed.
Intenté buscar en los archivos host.deny y host.allow, pero no parecen estar modificados (están comentados con #)
Luego intenté investigar etc/ssh/sshd_config
, pero no sé exactamente qué buscar. Estos son algunos de los parámetros que parecen relevantes:
# 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
¿Cual podría ser el problema? Tenga en cuenta que no estoy tratando de iniciar sesión con ssh-keys, insertar la contraseña está bien. ¿Cómo puedo hacer que funcione?
Editar Este es el contenido de todo el archivo sshd_config:
# 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
Editar 2
Aquí está la salida del intento de conexión conssh -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 no-more-sessions@openssh.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
Edite 3 el perfil del nuevo usuario en el servidor
# 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"
PasswordAuthentication
se comenta?
ssh -vv myname@host
y si no puede ver el problema en la salida, agregue la salida (formateada) a su pregunta.