How do I get SSH server to work with putty client?
This might sound a little obvious, but you need to setup puTTY for ssh, it can do multiple protocols. Under category Session:
Hostname: <remote IP>
Connection Type: ssh
Port: <should default to 22>
Note if you moved the port from he default, you'd have to specify it in your linux connection too.
Next down in Category Connection->SSH check that preferred SSH is set to "2" or "2 only" (your config shows two support and it's a better choice than 1)
Finally puTTY can store information in it's own log which might illuminate the problem click on the Session->Logging category to find out where the file is, set logging to "All session output" and see what shows up.
The error your getting shows the remote server isn't even establishing a connection, which means:
- You have the wrong IP
- You have the wrong port
- There's a firewall on the remote server preventing connections from this box
- There's an SSH setting preventing your specific host from connecting (as harish.venkat mentioned)
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Mazal
Updated on September 18, 2022Comments
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Mazal over 1 year
I have an Ubuntu 12.04.01 desktop PC, 64-bit. It has
openssh-server
installed.When I SSH to the server from a linux box it works. But when I use PuTTY from my Windows 7 PC to connect then I just get an immediate error:
The server closed the connection unexpectidely
Both the server and the PC are on the same LAN. Both have static IP's.
I have searched but couldn't find out why the OpenSSH server immediately closes the connection. It doesn't even give the option for login.
How can I find and fix this problem please?
EDIT: sshd_config file contents added:
# Package generated configuration file # See the sshd_config(5) manpage for details # What ports, IPs and protocols we listen for # 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 #Privilege Separation is turned on for security UsePrivilegeSeparation yes # Lifetime and size of ephemeral version 1 server key KeyRegenerationInterval 3600 ServerKeyBits 768 # 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 IgnoreUserKnownHosts no PasswordAuthentication yes GatewayPorts yes AllowTcpForwarding yes KeepAlive yes
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ivange over 11 yearscheck whether you have
sshd:ALL
in/etc/hosts.allow
please give the contents of/etc/ssh/sshd_config
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gaurav gupta over 11 yearsStart by monitoring the auth log on the server with
sudo tailf /var/log/auth.log
, that may provide clues to what's happening. -
Mazal over 11 years@harish.venkat, I added the sshd:ALL entry. Still the same error. Edit original post and added contents of sshd_config file.
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RahulKumar almost 11 yearsIt seems that your windows machine is not allowing to connect to the ssh server. Please try to ping the ssh server from your windows machine if you got succeeded then client machine is ok. I have same sshd_config and it works fine for me.
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Mazal almost 11 yearsI can ping the server fine and access the shares as well
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