How could I start an application with the ssh module from python on a remote system? I've tried
from shh import SSHClient
client = SSHClient()
client.load_system_host_keys()
client.connect("192.168.12.130", username="user", password="password")
stdout = client.exec_command('/path/to/application/app')
print "pwd: ", stdout.readlines()
but it seems not to work.. In other words, I want to start an c++-application on a remote system and get access to the std::out stream. Other solutions are welcome
Related
I am trying to connect to a server using SSH protocol through a jump server. When I connect through a terminal using a protocol, the jump server opens a shell and asks for a server number from the list of available servers provided, followed by a user or password. Using the library Paramiko.
My code:
import paramiko
client = paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
client.connect(
hostname="server_ip",
username="user",
password="pass",
look_for_keys=False,
allow_agent=False
)
com='1'
stdin, stdout, stderr = client.exec_command(com)
data = stdout.read() + stderr.read()
print(data.decode('utf-8'))
I get message:
Invalid target.
My shell on the jump server looks like this:
Your jump server probably shows the selection in an interactive shell session only. So you will have to use SSHClient.invoke_shell, what is otherwise not good thing to do when automating a connection.
See also What is the difference between exec_command and send with invoke_shell() on Paramiko?
I am writing a Python code to SSH or Telnet remote hosts, execute some commands and get the result output. Here we have a jump server, so the code must be "connected" with this server and from it, Telnet or SSH the remote hosts.
All my approaches work fine within the jump server, for example I can get the output of commands inside it. The problem is when I try to remote connect to hosts from it.
import paramiko
client = paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
client.connect('IP', 22, username="user", password="pass")
stdin, stdout, stderr = client.exec_command("command")
for line in stdout:
print('... ' + line.strip('\n'))
client.close()
Using the library jumpssh get same results, and I am not will able to Telnet hosts. I tried the follow approach, but get the error
Administratively prohibited.
from jumpssh import SSHSession
gateway_session = SSHSession('jumpserver','user', password='pass').open()
remote_session = gateway_session.get_remote_session('IP',password='pass')
print(gateway_session.get_cmd_output('command'))
In the last company i worked we had a license from an SSH client that supports Python scripts, and worked fine in a more "textual" treatment.
There is any way of accomplish same task natively in Python?
SSHSession is trying to open direct-tcpip port forwarding channel over the gateway_session.
"administratively prohibited" is OpenSSH sshd server message indicating that direct-tcpip port forwarding is disabled.
To enable port forwarding, set AllowTcpForwarding and DisableForwarding directives in sshd_config appropriately.
If you cannot enable the port forwarding on the server, you cannot use jumpssh library.
If you have a shell access to the server, you can use ProxyCommand-like approach instead.
See Paramiko: nest ssh session to another machine while preserving paramiko functionality (ProxyCommand).
I am trying to use Paramiko to make an SSH communication between 2 servers on a private network. The client server is a web server and the host server is going to be a "worker" server. The idea was to not open up the worker server to HTTP connections. The only communication that needs to happen, is the web server needs to pass strings to a script on the worker server. For this I was hoping to use Paramiko and pass the information to the script via SSH.
I set up a new user and created a test script in Python 3, which works when I run it from the command line from my own user's SSH session. I put the same code into my Django web app, thinking that it should work, since it tests OK from the command line, and I get the following error:
Server 'worker-server' not found in known_hosts
Now, I think I understand this error. When performing the test script, I was using a certain user to access the server, and the known hosts information is saved to ~/.ssh/known_hosts even though the user is actually a 3rd party user created just for this one job. So the Django app is running under a different user who doesn't find the saved known hosts info because it doesn't have access to that folder. As far as I can tell the user which Apache uses to execute the Django scripts doesn't have a home directory.
Is there a way I can add this known host in a way that the Django process can see it?
Script:
import paramiko
client = paramiko.SSHClient()
client.load_system_host_keys()
client.connect('worker-server', 22, 'workeruser', 'workerpass')
code = "123wfdv"
survey_id = 111
stdin, stdout, stderr =
client.exec_command('python3 /path/to/test_script/test.py %s %s' % ( code, survey_id ))
print( "ssh successful. Closing connection" )
stdout = stdout.readlines()
client.close()
print ( "Connection closed" )
output = ""
for line in stdout:
output = output + line
if output!="":
print ( output )
else:
print ( "There was no output for this command" )
You can hard-code the host key in your Python code, using HostKeys.add:
import paramiko
from base64 import decodebytes
keydata = b"""AAAAB3NzaC1yc2EAAAABIwAAAQEA0hV..."""
key = paramiko.RSAKey(data=decodebytes(keydata))
client = paramiko.SSHClient()
client.get_host_keys().add('example.com', 'ssh-rsa', key)
client.connect(...)
This is based on my answer to:
Paramiko "Unknown Server".
To see how to obtain the fingerprint for use in the code, see my answer to:
Verify host key with pysftp.
If using pysftp, instead of Paramiko directly, see:
PySFTP failing with "No hostkey for host X found" when deploying Django/Heroku
Or, as you are connecting within a private network, you can give up on verifying host key altogether, using AutoAddPolicy:
client = paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
client.connect(...)
(This can be done only if you really do not need the connection to be secure)
I'm trying to execute few commands in a Jump server(linux) to access certain devices(modems) using SSH. And then get some device details after login in to the device(modem)
I'm using Paramiko to access jump server, the below code
import paramiko
import time
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect('jump server ip', username='user', password='pass', key_filename='D:\New folder\id_rsa')
stdin, stdout, stderr = ssh.exec_command('pwd') #prints the correct pwd
This works fine
So from the jump server I need to ssh a device(modem) using its ipv6 mac address.
the command is
sudo stbsshv6 'ipv6address'/n
But when I execute any command after ssh the device(modem), I'm not getting anything in stdout. Example:
import paramiko
import time
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect('jump server ip', username='user', password='pass', key_filename='D:\New folder\id_rsa')
stdin, stdout, stderr = ssh.exec_command('sudo stbsshv6 "ipv6address"')
stdin.write('ifconfig wlan0\n')#some working command
print stdout.readlines() # prints nothing
I can do manually the above steps using putty,
I'm new to python, can anyone suggest the right solution for this or any alternate way is also great. Thanks
I would like to know how to to jump from one remote server to another remote server using paramiko. I want to ssh from my local pc to remote-A then from remote-A to remote-B and from remote- B to remote-C.
import paramiko
def connect(ip, usr, psw):
client = paramiko.SSHClient()
client.load_host_keys('/home/dgomez/.ssh/known_hosts')
client.connect(ip, username=usr, password=psw)
return client
host1 = connect('192.168.1.2', 'username', 'password')
# Here I'm connect to remote-A
Now I would to know how can I connect from Remote-A to Remote-B.
use for pexpect module it is very useful for you http://www.noah.org/wiki/pexpect
and and pexpect module simplified in pxssh module that very good for remote login http://dsnra.jpl.nasa.gov/software/Python/site-packages/Contrib/pxssh.html
simple code:
import pxssh
host = pxssh.pxssh
host.login('hostname','username','password')
host.sendline('command')#'ls'
print host.before