远程服务器端口是否开放(审计)

定期对服务器进行扫描，将危险端口有开放的服务器记录日志或通过邮件、微信告警出来
先定义服务器列表 iplist：
10.10.0.50
10.10.0.51
10.10.0.52
....
检查端口过程如下：

#!/bin/bash

for i in `awk '{print $1}' iplist`;
do 
    if [[ $(nmap $i -p 22 |grep open|grep -v grep|wc -l) -eq 1 ]];then
        echo $i 22 is up.
    else
        echo $i 22 is down.
    fi;
done

for i in `awk '{print $1}' iplist`;
do 
    if [[ $(nmap $i -p 80 |grep open|grep -v grep|wc -l) -eq 1 ]];then
        echo $i 80 is up.
    else
        echo $i 80 is down.
    fi;
done