# cat check_port.sh

#!/bin/bash

cat ip.txt|while read line

do

    /usr/bin/nc -w 1 -z $line > /dev/null 2>&1

    if [ $? -eq 0 ]

    then

        echo telnet $line ok

        sleep 1

    else

        echo telnet $line fail

    fi

done

# cat ip.txt

124.234.83.15 80

124.234.83.10 80