ssh - paramiko.ssh_exception.SSHException:TCP转发请求被拒绝

Question

我正在使用paramiko的rforward.py演示脚本，该脚本演示了反向SSH隧道的工作方式。该代码包含以下几行:transport.request_port_forward('', server_port)
运行此代码时，出现以下错误:

Traceback (most recent call last):
  File "C:\Users\Name\Documents\bh_python\rforward.py", line 167, in <modul
e>
    main()
  File "C:\Users\Name\Documents\bh_python\rforward.py", line 160, in main
    reverse_forward_tunnel(options.port, remote[0], remote[1], client.get_transp
ort())
  File "C:\Users\Name\Documents\bh_python\rforward.py", line 73, in reverse
_forward_tunnel
    transport.request_port_forward('', server_port)
  File "build\bdist.win32\egg\paramiko\transport.py", line 775, in request_port_
forward
paramiko.ssh_exception.SSHException: TCP forwarding request denied

这是有问题的transport.request_port_forward代码:

def request_port_forward(self, address, port, handler=None):
        if not self.active:
            raise SSHException('SSH session not active')
        port = int(port)
        response = self.global_request('tcpip-forward', (address, port), wait=True)
        if response is None:
            raise SSHException('TCP forwarding request denied')
        if port == 0:
            port = response.get_int()
        if handler is None:
            def default_handler(channel, src_addr, dest_addr_port):
                #src_addr, src_port = src_addr_port
                #dest_addr, dest_port = dest_addr_port
                self._queue_incoming_channel(channel)
            handler = default_handler
        self._tcp_handler = handler
        return port`

看来我的系统正在拒绝端口转发请求。我该如何验证并解决问题？我在Windows 7上运行。

Answer 1

这听起来像是服务器上的某些东西被阻止了。虽然我对Windows不太熟悉，但我相信应该可以安装SSH命令行客户端，并尝试使用ssh客户端复制您对Paramiko所做的操作。如果它与SSH客户端一起使用，则说明您的代码存在问题。否则，您将遇到服务器配置问题。