Incorrect SSH port number By default, servers listen for SSH connections on port 22. To enable TCP-Keepalive on the client (Putty), you can check Enable TCP keepalives (SO_KEEPALIVE option) as follows and further set the seconds to send null packets to the server to keep the session active.įor WinSCP use the following settings in Advanced for the specific ssh connection. Incorrect IP address or hostname The error may be due to a simple typo. If the config file doesn’t exists, simply create it. If you want to enable this only for a specific user, you can add the following lines into the user’s ssh config file located in /home//.ssh/config or only for the actual user by ~/.ssh/config. To enable TCP-Keepalive on the Linux client system wide, you can edit the /etc/ssh/ssh_config file and add the following entryġ5 -> timeout interval in seconds after which if no data has been received from the server, ssh will send a message through the encrypted channel to request a response from the server. To enable TCP-Keepalive on the ssh server, you can comment out the following line in /etc/ssh/sshd_config If no response, ssh server will let ssh client to exit (timeout) automatically. ssh SSH Enabled : Yes Secure Copy Enabled : No TCP Port Number : 22 Timeout. In case your ssh connection is permanently disconnected in idle state, you can enable TCP-Keepalive either on the ssh server or the client or on both. If ClientAliveInterval is set to 15, and ClientAliveCountMax is left at the default, unresponsive SSH clients will be disconnected after approximately 45 seconds. Executing show ip ssh will show the list of active SSH session and using.
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