Get SSH Banner using raw sockets -


i wrote small script list op ssh servers in local network because didn't know ip address of computers without connecting them screen , looking (which eliminate need ssh). because have multiple ssh servers, want know ip address belongs computer. that, thougth of using ssh banner indentify computer. since using ssh library little bit overkill banner , learning experience, want implement using sockets.

atm have in python:

from socket import socket s = socket() s.connect((ip,22)) s.send(s.recv(100)) # send ssh version

until here works, , reading socket gives list of supported encryption algoritms. should send list of algoritms , mac address (in haven't succeeded yet). tried sending list got server, after didn't got response.

according documentation, server @ moment send banner. when use normal ssh client, displays banner before log in, don't think need go through whole authenticating process.

whats simple way ssh banner using sockets?

(code doesn't have in python)

use paramiko - ssh client wrapper written in python, code can re-used grab banner

# !/usr/bin/python  import paramiko   def grab_banner(ip_address, port):     client = paramiko.sshclient()     client.load_system_host_keys()     client.set_missing_host_key_policy(paramiko.autoaddpolicy())     try:         client.connect(ip_address, port=port, username='username', password='bad-password-on-purpose')     except:         return client._transport.get_banner()   if __name__ == '__main__':     print grab_banner('192.168.1.26', 22)
  • had same issue, tried use raw sockets saw banner sent after ssh encryption key exchange (overkill implement grabbing banner)

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