Question

我正在尝试连接到我们的一个SFTP服务器以自动生成报告。我们每周从该服务器提取一个文件，但我无法使该连接正常工作。我找不到以下跟踪错误的任何有用参考。任何人都有可能导致此问题的想法吗？

在执行代码2或3秒钟后，我收到一个socket.timeout错误。

import paramiko


cli = paramiko.SSHClient()

cli.set_missing_host_key_policy(paramiko.AutoAddPolicy())
cli.connect(hostname='AHOST', port=21, username="USER", password="PASS")

stdin_, stdout_, stderr_ = cli.exec_command("ls -l ~")
print(stdout_.readlines())

cli.close()

跟踪：

Exception: Error reading SSH protocol banner
Traceback (most recent call last):
  File "C:\Users\user_name\Desktop\Python 3.6.2\lib\site-packages\paramiko\transport.py", line 2138, in _check_banner
    buf = self.packetizer.readline(timeout)
  File "C:\Users\user_name\Desktop\Python 3.6.2\lib\site-packages\paramiko\packet.py", line 367, in readline
    buf += self._read_timeout(timeout)
  File "C:\Users\user_name\Desktop\Python 3.6.2\lib\site-packages\paramiko\packet.py", line 576, in _read_timeout
    raise socket.timeout()
socket.timeout

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\user_name\Desktop\Python 3.6.2\lib\site-packages\paramiko\transport.py", line 1966, in run
    self._check_banner()
  File "C:\Users\user_name\Desktop\Python 3.6.2\lib\site-packages\paramiko\transport.py", line 2143, in _check_banner
    "Error reading SSH protocol banner" + str(e)
paramiko.ssh_exception.SSHException: Error reading SSH protocol banner

Traceback (most recent call last):
  File "C:\Users\user_name\Desktop\Python 3.6.2\lib\site-packages\paramiko\transport.py", line 2138, in _check_banner
    buf = self.packetizer.readline(timeout)
  File "C:\Users\user_name\Desktop\Python 3.6.2\lib\site-packages\paramiko\packet.py", line 367, in readline
    buf += self._read_timeout(timeout)
  File "C:\Users\user_name\Desktop\Python 3.6.2\lib\site-packages\paramiko\packet.py", line 576, in _read_timeout
    raise socket.timeout()
socket.timeout

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:/Users/user_name/PycharmProjects/PDD_Report/MAIN/MAIN.py", line 12, in <module>
    cli.connect(hostname='A40T', port=21, username="user_name", password="gate001")
  File "C:\Users\user_name\Desktop\Python 3.6.2\lib\site-packages\paramiko\client.py", line 397, in connect
    t.start_client(timeout=timeout)
  File "C:\Users\user_name\Desktop\Python 3.6.2\lib\site-packages\paramiko\transport.py", line 587, in start_client
    raise e
  File "C:\Users\user_name\Desktop\Python 3.6.2\lib\site-packages\paramiko\transport.py", line 1966, in run
    self._check_banner()
  File "C:\Users\user_name\Desktop\Python 3.6.2\lib\site-packages\paramiko\transport.py", line 2143, in _check_banner
    "Error reading SSH protocol banner" + str(e)
paramiko.ssh_exception.SSHException: Error reading SSH protocol banner

Answer 1

您正在连接到FTP端口21。

SSH / SFTP使用端口22（port参数的默认值，该值将被您覆盖）。

旁注1：您的问题与SFTP有关。但是，不用SFTPClient而是使用SSHClient并执行 shell 命令–与SFTP无关。

注释2：请勿像这样使用AutoAddPolicy。您这样做会失去安全性。
参见Paramiko "Unknown Server"。

SFTP连接失败socket.timeout？

1 个答案: