How to Verify SSH Connections Was Secured?

B

SSH (Secure Shell) is a cryptographic network protocol that provides a secure way to remotely access network devices. SSH is used to encrypt the connection between two devices, making it difficult for an attacker to intercept or modify the data being transmitted.

To verify that an SSH connection is secure, you can use the SSH command with the verbose (-v) option. The verbose option displays detailed information about the connection, including the encryption algorithm and key exchange used.

The correct command to verify an SSH connection is:

B. ssh -v 2 -l admin IP

Explanation:

A. ssh -v 1 -l admin IP: This command attempts to initiate an SSH connection using version 1 of the SSH protocol. However, version 1 of SSH is considered insecure and has several vulnerabilities. Therefore, this command is not recommended.

B. ssh -v 2 -l admin IP: This command initiates an SSH connection using version 2 of the SSH protocol and the verbose (-v) option. Version 2 of SSH is the most commonly used version and is considered secure. The verbose option displays detailed information about the connection, including the encryption algorithm and key exchange used.

C. ssh -l admin IP: This command initiates an SSH connection without specifying a version or the verbose option. Without the verbose option, no detailed information about the connection is displayed. Therefore, this command does not verify that the SSH connection is secure.

D. ssh -v -l admin IP: This command initiates an SSH connection with the verbose option, but without specifying a version. Version 2 of SSH is the most commonly used version and is considered secure. Therefore, it is recommended to specify the version of SSH being used.

In summary, option B is the correct command to verify that an SSH connection is secure because it uses version 2 of the SSH protocol and the verbose (-v) option to display detailed information about the connection.