How to Verify SSH Access Configuration on Junos Devices

A

SSH is a secure protocol used to establish a secure remote connection with a device. To verify that you have correctly configured SSH access to your Junos device, you need to check the configuration of the SSH service. There are a few different ways to do this, but the most common method is to use the command line interface (CLI) of the device.

Here are the steps to verify SSH access to a Junos device:

1. Connect to the device using a terminal emulator, such as PuTTY or SecureCRT.
2. Log in as a user with administrative privileges, such as the root or superuser account.
3. Enter configuration mode by typing "configure" at the command prompt and pressing Enter.
4. Verify that the SSH service is enabled by typing "show configuration system services" at the command prompt and pressing Enter. This command will display the current configuration for the system services. Look for the line that starts with "ssh" and make sure that it is not commented out (i.e., it does not start with a "#" character).
5. Verify that the SSH service is running by typing "show system processes | grep ssh" at the command prompt and pressing Enter. This command will display a list of processes that are currently running on the device. Look for the process that is named "sshd" (which stands for "SSH daemon"). If the process is running, then the SSH service is active and listening for connections.
6. Test the SSH connection by opening a new terminal window and using an SSH client to connect to the device. Use the IP address or hostname of the device, and enter the username and password of an account that has been granted SSH access. If the connection is successful, then you have correctly configured SSH access to the device.

In the given options, option C (user@router# show configuration system services) is the correct answer, as it shows the configuration of system services, including SSH. Option A (user@router# show system services) displays the current state of all services on the device, including SSH, but does not show the configuration. Option B (user@router> show configuration services) and option D (user@router# show system login) do not specifically relate to SSH and are therefore not the correct options for verifying SSH access to a Junos device.