Linux脚本探测UDP端口 – nmap应用

#!/bin/bash

host=$1
port=$2

#nmap端口扫描命令示例
# nmap -sU www.baidu.com -p 54880-54889
# nmap -sU www.baidu.com -p 54230

result=$(nmap -sU $host -p $port | grep -w "open" | awk '{print $2}')

if [ "$result" == "open|filtered" ]; then
  echo "1"
else
  echo "0"
fi

【参数示例】
sh ./udpKeepAlive.sh [HOST] [PORT]

【运行示例】
sh ./udpKeepAlive.sh www.baidu.com 80