我正在尝试使用Python库pyftpdlib在我的Ubuntu Amazon EC2实例上创建一个简单的FTPS服务器。
以下是文档中的代码:
#!/usr/bin/env python
"""
An RFC-4217 asynchronous FTPS server supporting both SSL and TLS.
Requires PyOpenSSL module (http://pypi.python.org/pypi/pyOpenSSL).
"""
from pyftpdlib.servers import FTPServer
from pyftpdlib.authorizers import DummyAuthorizer
from pyftpdlib.contrib.handlers import TLS_FTPHandler
import os
def main():
authorizer = DummyAuthorizer()
authorizer.add_user('ubuntu', '*****', os.getcwd(), perm='elradfmw')
authorizer.add_anonymous('.')
handler = TLS_FTPHandler
handler.certfile = 'keycert.pem'
handler.authorizer = authorizer
handler.masquerade_address = '52.23.244.142'
# requires SSL for both control and data channel
handler.tls_control_required = True
handler.tls_data_required = True
handler.passive_ports = range(60000, 60099)
server = FTPServer(('', 21), handler)
server.serve_forever()
if __name__ == '__main__':
main()
当我在Amazon EC2实例上运行脚本时,当我尝试使用FileZilla远程连接时,我得到:
Status: Connecting to 52.23.244.142:21...
Status: Connection established, waiting for welcome message...
Response: 220 pyftpdlib 1.4.0 ready.
Command: AUTH TLS
Response: 234 AUTH TLS successful.
Status: Initializing TLS...
Status: Verifying certificate...
Command: USER ubuntu
Status: TLS/SSL connection established.
Response: 331 Username ok, send password.
Command: PASS *****
Response: 230 Login successful.
Command: OPTS UTF8 ON
Response: 501 Invalid argument.
Command: PBSZ 0
Response: 200 PBSZ=0 successful.
Command: PROT P
Response: 200 Protection set to Private
Command: OPTS MLST type;perm;size;modify;unix.mode;unix.uid;unix.gid;
Response: 200 MLST OPTS type;perm;size;modify;unix.mode;unix.uid;unix.gid;
Status: Connected
Status: Retrieving directory listing...
Command: PWD
Response: 257 "/" is the current directory.
Command: TYPE I
Response: 200 Type set to: Binary.
Command: PASV
Response: 227 Entering passive mode (52,23,244,142,174,172).
Command: MLSD
Response: 150 File status okay. About to open data connection.
Error: Connection timed out
Error: Failed to retrieve directory listing
我想我错过了一些东西。我可以得到一些帮助吗?
答案 0 :(得分:2)
您的服务器必须在对PASV
命令的响应中显示其外部IP地址。您改为在EC2专用网络中提供内部IP地址,FileZilla显然无法连接到该IP地址。
虽然FileZilla可以解决这个问题:
服务器发送带有不可路由地址的被动回复。改为使用服务器地址。
其他FTP客户端(如Windows命令行ftp.exe
)不能。
使用handler.masquerade_address
配置外部IP地址:
handler.masquerade_address = '52.23.244.142'
FileZilla无法连接到端口50048(195 <&lt;&lt; 8 + 128)。您可能没有在EC2防火墙的FTP被动模式端口范围内打开端口。
请参阅Setting up FTP on Amazon Cloud Server(特别是&#34;步骤2:打开EC2实例上的FTP端口&#34; <{3}}中的)。
要避免打开整个非特权端口范围,请使用the best answer限制FTP服务器使用较小的端口范围:
handler.passive_ports = range(60000, 60099)
有关一般信息,请参阅我有关handler.passive_ports
。