linux SSH settings

Environment: centos7

A, SSH connection timeout provided

　　(1) client settings

　　Connection Kit: SecureCRT

　　1, SecureCRT client -> Options (Options) -> Session Options (Session Setup)

 　　

　　2, Terminal (Terminal) -> Set send NOOP command to the server every 60 seconds to maintain the connection

　　 

　　(2) Server Configuration:

　　vi / etc / ssh / sshd_config added:

ServerAliveInterval 1200 　　 #ClientAliveInterval every option defines the number of seconds to send a signal to the SSH client 
ServerAliveCountMax 3　　    #ClientAliveCountMax option defines disconnect from the ssh client after more than how many times the signal did not respond

　　3 to the client signal, the response did not disconnect, idle timeout: 1200 * 3 = 3600s

　　vi /etc/ssh/ssh_config　

ClientAliveInterval 1200　　 #ClientAliveInterval option defines the number of seconds the client every time a signal is sent to the service end to end

ClientAliveCountMax 3　　　　 disconnect from the ssh server after #ClientAliveCountMax option defines how many times over the signal did not respond

 

　　3 a signal transmitted to the server, the response is not disconnected, effectively setting the value to be less than or equal server timeouts

　　Restart sshd: systemctl restart shhd.service