用xshell连接linux服务器失败 Could not connect to '112.74.73.194' (port 22): Connection failed.

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用XSHELL连接linux服务器出现以下错误

Connecting to 42.51.xxx.xxx:22...Connection established.To escape to local shell, press 'Ctrl+Alt+]'.Socket error Event: 32 Error: 10053.Connection closing...Socket close.Connection closed by foreign host.Disconnected from remote host(42.51.xxx.xxx:22) at 20:00:30.Type `help' to learn how to use Xshell prompt.

操作：用SSH工具连接linux电脑出现的问题：Read from socket failed: Connection reset by peer

起因：改变了系统权限 chmod 777 -R

解决办法：#chmod 400 /etc/ssh/*

重新连接成功！！！

重启SSH

service sshd restart

注意：修改# chmod 770 /etc/ssh/ssh_host_dsa_key.pub # chmod 770 /etc/ssh/ssh_host_rsa_key.pub重启网关service network restart

忠告：linux系统文件的权限请勿乱改。