由于不会使用iptables设置端口转发, 于是找到了如下这个东西, 性能还不错。
#!/usr/bin/python
# Author: Mario Scondo (www.Linux-Support.com)
# Date: 2010-01-08
# Script template by Stephen Chappell
#
# This script forwards a number of configured local ports
# to local or remote socket servers.
#
# Configuration:
# Add to the config file port-forward.config lines with
# contents as follows:
# <local incoming port> <dest hostname> <dest port>
#
# Start the application at command line with 'python port-forward.py'
# and stop the application by keying in <ctrl-c>.
#
# Error messages are stored in file 'error.log'.
#
import socket
import sys
import thread
import time
def main(setup, error):
# open file for error messages
sys.stderr = file(error, 'a')
# read settings for port forwarding
for settings in parse(setup):
thread.start_new_thread(server, settings)
print settings
# wait for <ctrl-c>
while True:
time.sleep(60)
def parse(setup):
settings = list()
for line in file(setup):
parts = line.split()
settings.append((int(parts[0]), parts[1], int(parts[2])))
return settings
def server(*settings):
try:
dock_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
dock_socket.bind(('', settings[0]))
dock_socket.listen(5)
while True:
client_socket = dock_socket.accept()[0]
print 'accepted'
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.connect((settings[1], settings[2]))
print 'Connected',settings
thread.start_new_thread(forward, (client_socket, server_socket))
thread.start_new_thread(forward, (server_socket, client_socket))
finally:
thread.start_new_thread(server, settings)
def forward(source, destination):
string = ' '
while string:
string = source.recv(4096) #There was 1024. I tried 4096 and it has better performance.
if string:
destination.sendall(string)
else:
source.shutdown(socket.SHUT_RD)
destination.shutdown(socket.SHUT_WR)
if __name__ == '__main__':
main('port-forward.config', 'error.log')
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