Linux system prevents SSH agent from idle disconnect issues

System: CentOS 5.9
1. Install expect
Yum-y Install expect

2. Configure the anti-SSH agent disconnect script

The code is as follows	Copy Code
VI sshproxy.sh #!/usr/bin/expect-f Set Timeout 60 Spawn/usr/bin/ssh-qtfncngd 7070-g Username@serverip Expect { "Password:" { Send "PASSWDR" } } Interact { Timeout {send "} If [Fork]!=0 exit Disconnect } chmod +x sshproxy.sh

3. Let the script run in the background

The code is as follows	Copy Code
Nohup./sshproxy.sh

So here's what I've added to the script because of the expect relationship:

The code is as follows	Copy Code
If [Fork]!=0 exit Disconnect

So that its script can be executed in the background, if not, use nohup not to make the script execute, why not in the back of the script to add & reasons is the same reason.

4. Verify that the script has been successful

The code is as follows	Copy Code
PS Aux|grep SSH /usr/bin/ssh-qtfncngd 7070-g Username@serverip

If you see a process with an SSH agent in the process, it means that the execution of the script is successful, if not, then I suggest that you execute the script manually to see where the error is.

Two other options added

Scenario One: setting on the client

The method is simple, simply edit (requires root permission)/etc/ssh/ssh_config on the client computer and add the following line:
Serveraliveinterval 60
After that the user in this system connects ssh, every 60 seconds will send a keepalive request, avoids being kicked.

Scenario two: Setting on the server side

If you have the appropriate permissions, you can also set the server-side, edit/etc/ssh/sshd_config, and add:
Clientaliveinterval
After you restart the SSH server, the setting takes effect. Each client connected to this server will be affected by it