脚本

#!/bin/bash
 
telnets()
{
	#先ping判断，避免telnet耗时过长
    P=`ping -c4 -w3 $1 | grep 'packet loss' | grep -v grep | awk -F',' '{print $3}' | awk -F'%' '{print $1}'`
if [ $P -eq 100 ]; 
	then 
		echo "ping不通"
		echo `date +"%Y.%m.%d %T"` " ping "${1}" 失败" >>telnetresults.txt
else
echo "telnet开始"
#`echo "\035"`和`echo "\015"`分别模拟键盘输入ctrl+] 和回车，quit退出
telnet $1 $2 <<EOF 2>temp.txt 1>&2
`echo "\035"`
`echo "\015"`
quit
EOF
echo "telnet结束"
echo 
RESULT=`cat temp.txt 2>/dev/null | grep "Connection closed" | wc -l`
if [ $RESULT -eq 1 ];
then
	echo `date +"%Y.%m.%d %T"`" telnet "${1}":"${2}" 成功" >>telnetresults.txt
else
	echo `date +"%Y.%m.%d %T"`" telnet "${1}":"${2}" 失败" >>telnetresults.txt
fi
fi
}

OLD_IFS="$IFS"
IFS=":"
#清空文件使用
echo "" >telnetresults.txt
echo "" >temp.txt
while read LINE
do
  echo $LINE
  array=$LINE
  ip=${array[0]}
  port=${array[1]}
  telnets $ip $port
done <ip.txt
IFS="$OLD_IFS"

使用

• 新建上述sh文件
• 同级目录新建ip.txt，每行为一个策略，[IP:PORT]

ip.txt 示例：

127.0.0.1:8080
127.0.0.1:3306