用Paramiko实现跳转主机（端口转发）涉及的hosts/IP个地址和端口的解释

Question

我正在尝试设置与 Paramiko 的跳转主机连接。

这是我在 ~/.ssh/config

中的设置

Host jump.csail.mit.edu
  GSSAPIAuthentication yes
  GSSAPIKeyExchange yes
  VerifyHostKeyDNS yes
Host *.csail.mit.edu !jump.csail.mit.edu 128.52.* 128.30.* 128.31.*
  ProxyCommand ssh -W %h:%p jump.csail.mit.edu
  GSSAPIAuthentication yes
  GSSAPIDelegateCredentials yes
  GSSAPIKeyExchange yes

如果我从终端连接，它就可以工作。

我也找到了this code for Paramiko jump host connection 我不知道我应该根据上面的ssh配置设置jumpbox_public_addr和jumpbox_private_addr什么？

import os
import paramiko

ssh_key_filename = os.getenv('HOME') + '/.ssh/id_rsa'

jumpbox_public_addr = '168.128.52.199'
jumpbox_private_addr = '10.0.5.10'
target_addr = '10.0.5.20'

jumpbox=paramiko.SSHClient()
jumpbox.set_missing_host_key_policy(paramiko.AutoAddPolicy())
jumpbox.connect(jumpbox_public_addr, username='root', key_filename=ssh_key_filename)

jumpbox_transport = jumpbox.get_transport()
src_addr = (jumpbox_private_addr, 22)
dest_addr = (target_addr, 22)
jumpbox_channel = jumpbox_transport.open_channel("direct-tcpip", dest_addr, src_addr)

target=paramiko.SSHClient()
target.set_missing_host_key_policy(paramiko.AutoAddPolicy())
target.connect(target_addr, username='root', key_filename=ssh_key_filename, sock=jumpbox_channel)

stdin, stdout, stderr = target.exec_command("ifconfig")
for line in stdout.read().split(b'\n'):
  print(str(line))

target.close()
jumpbox.close()

谢谢！

Answer 1

jumpbox_public_addr是你的跳转服务器地址，jump.csail.mit.edu.

应该是什么

jumpbox_private_addr（Transport.open_channel 的src_addr 参数）是从jump.csail.mit.edu 到目标服务器的连接源地址。通常你不关心那个（因为你不关心大多数 TCP 连接的源地址和端口）。它绝对不应该是端口 22。以下应该告诉服务器使用默认值：

src_addr = ("0.0.0.0", 0)

用Paramiko实现跳转主机（端口转发）涉及的hosts/IP个地址和端口的解释

Explanation of hosts/IP addresses and ports involved in implementation of jump host (port forwarding) with Paramiko

python

ssh

portforwarding

paramiko