Successful resolution of "Connection failed" errors

Table of contents

1. A "Connection failed" error occurs, as shown in the figure below:

2. If the password entered is correct, it will always be output again

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1. A "Connection failed" error occurs, as shown in the figure below:

• Most of the reasons are that the network is unreachable or the port is wrong:
• Ping the IP (note that some IPs are forbidden to ping) or whether the port is connected

•  There are several ways to detect ports: linux view network | view port | view routing | view ip

 

 

•  Check the port of the system: systemctl status sshd (default: 22)

• Check if sshd is enabled

•  You can also modify the configuration file: vi /etc/ssh/sshd_config

• Remember to restart the service after modification

• If sshd is not enabled, it can be enabled by systemctl start sshd

 2. If the password entered is correct, it will always be output again

•  Check the configuration file: vi /etc/ssh/sshd_config

•  The above shows that the root user is disabled, you need to open the root user or create another user