Linux SSH Security Hardening Quiz

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2. Which of these should be configured to harden SSH? (Select all that apply)

Change default SSH port

Enable key-based authentication

Disable unused authentication methods

Allow all users to connect

Submit

4. Which SSH protocol version should be used for modern security?

SSH version 1

SSH version 2

Both versions equally

SSH version 3

5. Port forwarding via SSH can introduce security risks if not properly configured.

True

False

6. Which option prevents SSH login using empty passwords?

PermitEmptyPasswords no

PasswordAuthentication no

StrictModes yes

PubkeyAuthentication yes

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8. SSH keys should be protected with a passphrase.

True

False

9. Which file contains the private SSH key for a user?

/home/user/.ssh/id_rsa

/home/user/.ssh/authorized_keys

/etc/ssh/ssh_host_rsa_key

/home/user/.ssh/known_hosts

10. What is the purpose of the 'LoginGraceTime' directive?

Time allowed to complete authentication

Maximum idle session time

Interval for keep-alive messages

Duration to cache SSH keys

11. Which SSH configuration directive disables password authentication and forces key-based login?

PasswordAuthentication no

PubkeyAuthentication yes

PermitRootLogin no

AllowUsers admin

12. Which of the following are recommended SSH hardening practices? (Select all that apply)

Disable password authentication

Use SSH keys for authentication

Allow root login

Set PermitRootLogin to no

Submit

13. Changing the default SSH port reduces security threats.

True

False

14. Which directive limits the number of concurrent SSH sessions per user?

MaxAuthTries

MaxSessions

LoginGraceTime

ClientAliveInterval

Submit

16. Which SSH key type is considered more secure for modern systems?

RSA 4096-bit

DSA

ECDSA

MD5

17. What does the 'PermitRootLogin' directive control in sshd_config?

Whether root can log in via SSH

The number of login attempts allowed

The encryption algorithm used

The SSH port number

18. Disabling root login via SSH is a security best practice.

True

False

19. Which file stores the public SSH keys for a specific user on a Linux host?

/home/user/.ssh/authorized_keys

/home/user/.ssh/id_rsa

/home/user/.ssh/known_hosts

/etc/ssh/ssh_config

20. What is the default SSH port number?

22

2222

443

8022

Linux Network Pro Hardening SSH Access on a Linux Host Quiz

1. The 'ssh-keygen' command is used to ____.

2.

What first name or nickname would you like us to use?

2. Which of these should be configured to harden SSH? (Select all that apply)

3. The 'sshd_config' file is typically located at ____.

4. Which SSH protocol version should be used for modern security?

5. Port forwarding via SSH can introduce security risks if not properly configured.

6. Which option prevents SSH login using empty passwords?

7. The 'AllowUsers' directive in sshd_config specifies ____.

8. SSH keys should be protected with a passphrase.

9. Which file contains the private SSH key for a user?

10. What is the purpose of the 'LoginGraceTime' directive?

11. Which SSH configuration directive disables password authentication and forces key-based login?

12. Which of the following are recommended SSH hardening practices? (Select all that apply)

13. Changing the default SSH port reduces security threats.

14. Which directive limits the number of concurrent SSH sessions per user?

15. The 'known_hosts' file stores ____.

16. Which SSH key type is considered more secure for modern systems?

17. What does the 'PermitRootLogin' directive control in sshd_config?

18. Disabling root login via SSH is a security best practice.

19. Which file stores the public SSH keys for a specific user on a Linux host?

20. What is the default SSH port number?