Comparison Between Paramiko (SSH) and Telnetlib (Telnet)
# Paramiko (SSH) is more secure than Telnetlib (Telnet).
* SSH (Secure Shell) encrypts login credentials and session data using encryption protocols like AES and RSA.
* Telnet transmits data in plaintext, making it vulnerable to eavesdropping and man-in-the-middle attacks.
# Why is Telnet Insecure?
* No encryption # Credentials (username/password) are sent in plaintext.
* Easily intercepted by attackers using packet sniffers (e.g., Wireshark).
Correct Method for Secure Remote Login in Python:
* Use Paramiko for SSH-based secure automation.
* Example of logging in with Paramiko (SSH) in Python:
import paramiko
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect("192.168.1.1", username="admin", password="password")
stdin, stdout, stderr = ssh.exec_command("display version")
print(stdout.read().decode())
ssh.close()
Reference from Huawei HCIE-Datacom Documentation:
* Huawei Security Best Practices - Avoiding Telnet and Using SSH for Secure Access
* HCIE-Datacom Training Material - Network Automation with Python (Paramiko & Telnetlib)