介绍
python-nmap是基于系统nmap命令的一个端口扫描工具，使用简单方便。
最近为了加强服务器安全性和监管，需要每天把公司服务器开放端口扫描记录，一旦出现增加减少能发现。
之前使用shell写过一个https://github.com/bashhu/monitor-shell/blob/master/python-script/scan_port.sh
最近打算完善一下我们的运维平台，重新编写了脚本，方便平台的调用
https://github.com/bashhu/monitor-shell/blob/master/python-script/scan_port.py
In [17]: import nmap
把nmap模块的端口扫描方法进行实例化
In [18]: s=nmap.PortScanner()
使用scan('192.168.0.0/16',port='0-65536','sV')方法，里面分别是网段，端口范围，nmap的参数
In [19]: result = s.scan('192.168.199.211', '20-443','')
这里result是执行的输出
In [20]: print result
{'nmap': {'scanstats': {'uphosts': '1', 'timestr': 'Sat Dec 17 16:24:11 2016', 'downhosts': '0', 'totalhosts': '1', 'elapsed': '0.11'}, 'scaninfo': {'tcp': {'services': '20-443', 'method': 'syn'}}, 'command_line': 'nmap -oX - -p 20-443 192.168.199.211'}, 'scan': {'192.168.199.211': {'status': {'state': 'up', 'reason': 'localhost-response'}, 'hostnames': [{'type': 'PTR', 'name': 'salt'}], 'vendor': {}, 'addresses': {'ipv4': '192.168.199.211'}, 'tcp': {80: {'product': '', 'state': 'open', 'version': '', 'name': 'http', 'conf': '3', 'extrainfo': '', 'reason': 'syn-ack', 'cpe': ''}, 443: {'product': '', 'state': 'open', 'version': '', 'name': 'https', 'conf': '3', 'extrainfo': '', 'reason': 'syn-ack', 'cpe': ''}, 22: {'product': '', 'state': 'open', 'version': '', 'name': 'ssh', 'conf': '3', 'extrainfo': '', 'reason': 'syn-ack', 'cpe': ''}}}}}
初始化的实例如下方法
In [21]: s.
s.all_hosts s.csv s.listscan s.scaninfo
s.analyse_nmap_xml_scan s.get_nmap_last_output s.nmap_version s.scanstats
s.command_line s.has_host s.scan
扫描的所有主机
In [21]: s.all_hosts()
Out[21]: ['192.168.199.211']
主机下的信息列表
In [23]: s['192.168.199.211'].keys()
Out[23]: ['status', 'hostnames', 'vendor', 'addresses', 'tcp']
主机下的tcp端口列表
In [26]: s['192.168.199.211']['tcp'].keys()
Out[26]: [80, 443, 22]
查看22端口的详细信息
In [30]: s['192.168.199.211']['tcp'][22]
Out[30]:
{'conf': '3',
'cpe': '',
'extrainfo': '',
'name': 'ssh',
'product': '',
'reason': 'syn-ack',
'state': 'open',
'version': ''}
通过上面大家可以看到 s=nmap.PortScanner()实例化以后，会把信息存储到“s”里面，“s”可以像从json里面取数据一样超级方便。
下面是脚本原理，欢迎大家拍砖，提更好意见：
依赖python-nmap模块扫扫面网段或者指定ip端口
对比redis内昨日此ip的端口集合，获取相互差集记录到文本
删除昨日的端口扫面记录，把今日信息ip为KEY 端口为集合记录到redis
#!/bin/bash
'''
author: baishaohua
date: 20161215
'''
host='192.168.1.224'
port='6379'
import nmap
import redis
import time
ctime = time.strftime('%Y_%m_%d')
r = redis.StrictRedis(host,port=port,db=12)
def get_info(ip):
'''获取集合，并把集合元素转换为整数'''
a=[]
for i in r.smembers(ip):
a.append(int(i))
return a
def set_info(ip, port_list):
r.delete(ip)#删除昨日的端口记录，下面遍历写入今日的端口
try:
for port in port_list:
r.sadd(ip, port)
except:
print "set redis err"
def r_log(msg):
f_path = "/tmp/report_%s.txt" % ctime
f = open(f_path, 'a+')
f.write(msg)
f.close()
def scan_port(my_ip,port_range):
'''
tow parameter: ip,port. will return a port list
'''
s = nmap.PortScanner()
result = s.scan(my_ip,port_range,'')
return s[my_ip]['tcp'].keys()
def scan_ips(ip_range,port_range):
'''
tow parameter: ip,port. will return a port list
'''
s = nmap.PortScanner()
result = s.scan(ip_range,port_range,'')
report_key = "report_%s" % ctime
a = {}
b = {}
for i in s.all_hosts():
a[i] = set(get_info(i))
b[i] = set(s[i]['tcp'].keys())
if r.exists(i):
less_port = a[i].difference(b[i])
add_port = b[i].difference(a[i])
if len(add_port)>0 and len(less_port)>0:
msg = "%s port %s new open \t %s have close\n" % (i, add_port, less_port)
print msg
r_log(msg)
elif len(add_port)>0:
msg = "%s port %s new open \n" % (i, add_port)
print msg
r_log(msg)
elif len(less_port)>0:
msg = "%s port %s close \n" % (i, less_port)
print msg
r_log(msg)
else:
print "%s port no change: %s , %s" % (i, a[i], b[i])
set_info(i, s[i]['tcp'].keys())
else:
msg = "new host: %s port %s open\n" % (i, s[i]['tcp'].keys())
print msg
r_log(msg)
set_info(i,s[i]['tcp'].keys())
def __main__():
scan_ips('192.168.1.211/28','20-8080')