通过SSH登录思科无线控制器

Question

我有一个工作的python脚本，它将登录到cisco设备（路由器/交换机）并从中提取您想要的任何信息。我现在正在为cisco wlc做同样的事情，但是为了ssh进入wlc，它需要'login as'这个名称以及'username / password'。我正在使用paramiko，无法弄清楚如何添加与“登录为”名称连接的额外步骤。还有另一个ssh模块允许我这样做吗？

以下是通过ssh登录cisco wlc的示例：

登录为：test

（思科控制器）

用户：测试

密码：****

这是使用paramiko.connect的文档：

connect（self，hostname，port = 22，username = None，password = None，pkey = None，key_filename = None，timeout = None，allow_agent = True，look_for_keys = True，compress = False）

这是我正在使用的代码，以防它有帮助：

import web
import paramiko
import time

urls = (
        '/wlc', 'Index'
)

app = web.application(urls, globals())

render = web.template.render('templates/')

class Index(object):
        def GET(self):
                return render.hello_form()

        def POST(self):
                form = web.input(user=" ", passwd=" ", device=" ")
                user = form.user
                passwd = form.passwd
                device = form.device

                #Used to change term length to 0 making it so we don't need to hit a key to scroll through the output
                def disable_paging(remote_conn, command="terminal length 0", delay=1):

                        #Send an enter
                        remote_conn.send("\n")
                        #Send 'terminal length 0'
                        remote_conn.send(command)

                        #Wait for command to complete
                        time.sleep(delay)

                        #Read output
                        output = remote_conn.recv(65535)

                        return output

                #Have remote_conn_pre equal to the SSHClient module in paramiko
                remote_conn_pre = paramiko.SSHClient()

                #This allows us to bypass the ssh key popup that comes up when you ssh into a device for the first time
                remote_conn_pre.set_missing_host_key_policy(
                        paramiko.AutoAddPolicy())

                remote_conn_pre.connect(device,username=user, password=passwd) #Connect to the device using our defind parameters

                remote_conn = remote_conn_pre.invoke_shell() #invoke_shell module gives us access to talk to the device via the cli

                output = disable_paging(remote_conn) #Run the disable_paging function that sets term length to 0

                remote_conn.send("\n")
                remote_conn.send("sh ap inventory")
                remote_conn.send("\n")

                time.sleep(2)

                output = remote_conn.recv(65535) #Read all output given

                return output #print output to screen

                remote_conn_pre.close() #Close the SSH connection


if __name__ == "__main__":
        app.run()

Answer 1

很多人都在玩paramiko.transport，但却无法继续下去。最后只是尝试.send（）信息，它现在给我我正在寻找的输出：

import web
import paramiko
import time

urls = (
        '/wlc', 'Index'
)

app = web.application(urls, globals())

render = web.template.render('templates/')

class Index(object):
        def GET(self):
                return render.hello_form()

        def POST(self):
                #Retrieve user input from web form
                form = web.input(user=" ", passwd=" ", device=" ")
                user = form.user
                passwd = form.passwd
                device = form.device

                #Make it so we don't need to hit a key to scroll through the output
                def disable_paging(remote_conn, command="config paging disable", delay=1):

                        remote_conn.send(command)
                        remote_conn.send("\n")
                        time.sleep(delay)


                #Have remote_conn_pre equal to the SSHClient module in paramiko
                remote_conn_pre = paramiko.SSHClient()

                #This allows us to bypass the ssh key popup that comes up when you ssh into a device for the first time
                remote_conn_pre.set_missing_host_key_policy(
                        paramiko.AutoAddPolicy())

                remote_conn_pre.connect(device, username=user, password=passwd) #Connect to the device using our defind parameters

                remote_conn = remote_conn_pre.invoke_shell() #invoke_shell module gives us access to talk to the device via the cli

                #Log into the WLC
                remote_conn.send(user)
                remote_conn.send("\n")
                remote_conn.send(passwd)
                remote_conn.send("\n")

                #Run the disable_paging function
                output = disable_paging(remote_conn)

                #Run command
                remote_conn.send("sh ap summary")
                remote_conn.send("\n")

                #Some WLCs can be slow to show output, have program wait 5 seconds
                time.sleep(5)

                output = remote_conn.recv(65535) #Read all output given

                return output #print output to screen

                remote_conn.close() #Close the SSH connection


if __name__ == "__main__":
        app.run()

我的输出中省略了“Login As”字段，所以我不确定那里放的是什么 - 可能只是来自remote_conn_pre.connect(device, username=user, password=passwd)的参数。无论如何，既然我能够登录设备，我就可以开始解析输出以获取我想要的信息。

Answer 2

JMarks - 您的代码中的想法非常有用。谢谢

我有以下 - 这很好地工作:)

...

def cisco_wlc_reconfigure（device_ip，username，password）：

print('\nAttempting to connect to',device_ip)
ssh_conn_pre = paramiko.SSHClient()
ssh_conn_pre.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh_conn_pre.connect(device_ip, port=22, username=username, password=password, look_for_keys=False, allow_agent=False)    
ssh_conn = ssh_conn_pre.invoke_shell()
time.sleep(5)
ssh_conn.send(username)
ssh_conn.send("\n")
ssh_conn.send(password)
ssh_conn.send("\n")
commands = ['show interface summary\r\n', 'show wlan summary\r\n']
for i in commands:    
    print('\n----------------------------------------\n')
    print('DATE/TIME:',datetime.datetime.now(),'\n')
    ssh_conn.send(i)
    time.sleep(5)
    output = ssh_conn.recv(65535)
    print(output.decode())
    print('\n')

...