paramiko.Proxycommand 无法设置套接字 [英] paramiko.Proxycommand fails to setup socket
问题描述
我正在尝试使用 Python 中的 paramiko 通过 SSH 连接到通过另一台计算机建立隧道的计算机,但我有一些奇怪的问题.我在 /.ssh/config
中的配置文件如下所示:
I am trying to connect via SSH to a computer tunneling through another computer using paramiko in Python, but I am having some strange issues.
My config file in /.ssh/config
looks like this:
Host remoteA
HostName 169.254.1.1
User root
IdentityFile ~/.ssh/id_dss.openssh.remoteA
ForwardX11 no
StrictHostKeyChecking no
ForwardAgent yes
UserKnownHostsFile /dev/null
Host remoteB
User root
IdentityFile ~/.ssh/id_dss.openssh.remoteB
ForwardX11 no
StrictHostKeyChecking no
UserKnownHostsFile /dev/null
ProxyCommand ssh -W 169.254.1.2:22 remoteA
我的python代码是这样的:
And my python code like this:
from paramiko import SSHClient, SSHConfig, SSHException
import getpass
import paramiko
def getSSHConnection(hostName):
config = SSHConfig()
user = getpass.getuser()
config.parse(open('C:/Users/' + user +'/.ssh/config'))
host=config.lookup(hostName)
# setup SSH client
client = SSHClient()
client.load_system_host_keys()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
#Check for proxy settings
try:
print host ['proxycommand']
proxy = paramiko.ProxyCommand(host['proxycommand'])
except:
proxy = None
#Setup the SSH connection
try:
if (proxy is None):
client.connect(host['hostname'],22, username=host['user'],key_filename=host['identityfile'])
else:
client.connect(host['hostname'],22, username=host['user'], key_filename=host['identityfile'], sock=proxy)
except SSHException, ex:
print ex
return client
ssh_client = getSSHConnection('remoteA')
# run a command
print "\nRun a command"
cmd = 'ps aux'
stdin, stdout, stderr = ssh_client.exec_command(cmd)
print stdout.read()
ssh_client = getSSHConnection('remoteB')
# run a command
print "\nRun a command"
cmd = 'ps aux'
stdin, stdout, stderr = ssh_client.exec_command(cmd)
print stdout.read()
首先当连接到 remoteA 时它运行良好,但是当连接到 remoteB 时它在步骤中崩溃:proxy = paramiko.ProxyCommand(host['proxycommand'])
.
First when connecting to remoteA it works perfectly, but then when connecting to remoteB it crashes in the step: proxy = paramiko.ProxyCommand(host['proxycommand'])
.
File "C:\Python27\lib\site-packages\paramiko\client.py", line 291, in connect
for (family, socktype, proto, canonname, sockaddr) in socket.getaddrinfo(hostname, port, socket.AF_UNSPEC, socket.SOCK_STREAM):
socket.gaierror: [Errno 11004] getaddrinfo failed
在 Cygwin 中,我可以使用命令 ssh remoteB
进行连接,所以我知道配置文件应该没问题.
Within Cygwin, I am able to connect using the command ssh remoteB
so I know the config file should be ok.
如果有什么不同,我在 Windows 7 上运行它.
If it makes any difference, I am running this on Windows 7.
推荐答案
所以我没有使用 ProxyCommand
而是使用端口转发来解决我的问题.
So instead of using ProxyCommand
I used port forwarding to solve my issue.
def getForwardedSSHPort(self, tunnnelHostName):
forwarderClient = self.getSSHConnection(tunnnelHostName, None)
transport = forwarderClient.get_transport()
dest_addr = ('169.254.1.2', 22)
local_addr = ('127.0.0.1', 10022)
channel = transport.open_channel('direct-tcpip', dest_addr, local_addr)
remoteClient = self.getSSHConnection( tunnnelHostName, channel)
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