Solve the problem that Alibaba Cloud SSH remote connection will be disconnected after a short time

Problem Reproduction

Alibaba Cloud Server, using Finalshell remote connection, no task exceptions occurred during the operation. As long as there is no operation during the remote connection, the server will be disconnected after a while. If you cannot enter commands in the input box, you need to close the current window and reconnect.

Problem Analysis

Generally, for this kind of problem, we first check whether there is a problem with finalshell itself. We can open xshell and remotely connect to Alibaba Cloud, and find that xshell is still disconnected. Then we have ruled out the possibility of software problems. Next, we need to check the ssh service to see if there are some restrictions in the sshd configuration file.

Problem Solving

1. Open the sshd configuration file

[root@ecs-c13b ~]# vim /etc/ssh/sshd_config

Modify the following two lines:

2. Modify the following parameters

ClientAliveInterval 30 #The client sends a heartbeat data to the service every 30 seconds

ClientAliveCountMax 1800 # The server will automatically disconnect the client if there is no response for a certain number of seconds

3. Restart the service:

Replenish

After solving this problem, I remembered another interesting parameter
LoginGraceTime 2m
This parameter means:
(1) Grace means how many seconds the system gives to log in.
(2) After the user connects to the SSH server, a screen will appear for entering the password.
(3) If the SSH server fails to connect successfully within a certain period of time, the connection will be disconnected. If no unit is given, the time is assumed to be seconds.

In the company, we often encounter a situation where you use ssh to connect remotely to an IP and are ready to enter your username and password. Before you enter them, the connection remains connected. Or you have entered your username and password but have not yet pressed Enter. At this time, your work is interrupted and someone comes to chat with you, so the connection will be waiting. This parameter means how long to wait before the connection is automatically closed.

Summarize

This article mainly explains that when you connect to the server remotely through ssh, if there is a situation where the connection is disconnected after a short period of time without any operation, you can adjust the parameters according to this article to extend the time.

This is the end of this article about how to solve the problem of Alibaba Cloud SSH remote connection being disconnected after a short time. For more relevant Alibaba Cloud SSH remote connection content, please search for previous articles on 123WORDPRESS.COM or continue to browse the following related articles. I hope everyone will support 123WORDPRESS.COM in the future!