I’m trying to implement a Python script to collect to some outputs from Switches and routers. My problem is that I need to go through a proxy server. The flow is like this:
Personal Mac ----1-----> jumpbox ----2----> Nexus SW
Step 1:
- Authentication via SSH Key and password
Step 2:
- Authentication via username/password
I’m using SSH File config, as below. Using this SSH File, I can connect to the jumphost so I don’t think the issue is on the first step:
host VPS
IdentityFile <keyfile>
user <username>
hostname <IP>
port 22
host * !VPS # Use the SSH proxy for all endpoints
ProxyCommand ssh VPS nc %h %p
When I try to connect to a switch using the script below, I’m getting the error below it:
<PYTHON SCRIPT>
from netmiko import ConnectHandler
from getpass import getpass
import logging
logging.basicConfig(filename='test.log', level=logging.DEBUG)
logger = logging.getLogger("my_log")
logger.debug('This message should go to the log file')
device = {
'device_type': 'cisco_ios',
'host': 'HOST',
'username': '<device username>',
'password': '#######,
'ssh_config_file': 'ssh_config.txt',
'global_delay_factor': 4
}
net_connect = ConnectHandler(**device)
output = net_connect.send_command("show users")
print(output)
/usr/local/bin/python2.7 "/Users/zammes/PycharmProjects/Network Automation/proxy_test.py"
Traceback (most recent call last):
File "/Users/zammes/PycharmProjects/Network Automation/proxy_test.py", line 19, in <module>
net_connect = ConnectHandler(**device)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/netmiko/ssh_dispatcher.py", line 190, in ConnectHandler
return ConnectionClass(*args, **kwargs)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/netmiko/base_connection.py", line 245, in __init__
self.establish_connection()
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/netmiko/base_connection.py", line 738, in establish_connection
self.remote_conn_pre.connect(**ssh_connect_params)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/paramiko/client.py", line 392, in connect
t.start_client(timeout=timeout)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/paramiko/transport.py", line 545, in start_client
raise e
paramiko.ssh_exception.SSHException: Error reading SSH protocol banner
Process finished with exit code 1
Is there someone that could help me with it?
