# Disable SSH Timeout on EC2

The automatic logout on EC2 running Debian 12 is typically due to the SSH session timing out or a terminal session timeout. You can disable these timeouts by adjusting the SSH and shell settings. Here are the steps you can follow:

#### 1. Disable SSH Timeout

To prevent SSH from timing out, you can modify the SSH server configuration:

Open the SSH server configuration file:

```sh
sudo nano /etc/ssh/sshd_config
```

Find and set the following parameters (if they are not present, add them):

```sh
ClientAliveInterval 120
ClientAliveCountMax 720
```

`ClientAliveInterval 120` sets the interval (in seconds) after which the server will send a message to the client requesting a response to keep the connection alive. In this case, it is set to 120 seconds.

`ClientAliveCountMax 720` sets the number of client alive messages that can be sent without receiving any messages back from the client. In this case, it is set to 720. Combined with the `ClientAliveInterval`, this allows for a 24-hour (120 seconds \* 720) timeout.

Save the file and exit the editor (Ctrl+O, Enter to save, Ctrl+X to exit).

Restart the SSH service to apply the changes:

```sh
sudo systemctl restart sshd
```