How to access a network device through a jump server using Jump

A jump host is a server inside a secure zone, that you access from a less secure zone. You can then jump from this host to greater security zones. An example would be a high security zone inside a corporation.

in this tutorial we are going to get a backup of a router configuration through a jumpserver using jumpssh

JumpSSH is a module for Python 2.7+/3.4+ that can be used to run commands on remote servers through a gateway.

installing the required packages

pip install jumpssh
pip install python-dotenv

we will use python-dotenv to manage our credentials to environment variable.

creating a .env file in the same path of our script

jumpserver_ip = 'your_jump_server_ip'
jumpserver_username = 'your_jump_server_username'
jumpserver_password = 'your_jump_server_password'
remote_ip = 'your_remote_node_ip'
remote_username = 'your_remote_node_username'
remote_password = 'your_remote_node_password'

then creating our script

from dotenv import load_dotenv
import jumpssh
import os
load_dotenv()
jumpserver_ip = os.getenv("jumpserver_ip")
jumpserver_username = os.getenv("jumpserver_username")
jumpserver_password = os.getenv("jumpserver_password")
remote_ip = os.getenv("remote_ip")
remote_password = os.getenv("remote_password")
gateway_session = SSHSession(jumpserver_ip, jumpserver_username, password=jumpserver_password).open()

remote_session = gateway_session.get_remote_session(remote_ip, password=remote_password, allow_agent=False, look_for_keys=False)
fl = open('R1.txt', 'w')
fl.write(remote_session.get_cmd_output('show running config'))
fl.close()
remote_session.close()
gateway_session.close()