#!/bin/bash
if [ -z "$1" ]
then
    echo "You must specify a filename to read from"
    exit 1
fi
if [ ! -f "$1" ]
then
    echo "File $1 does not exist or is not a file"
    exit 1
fi
if [ -z "$2" ]
then
	echo "Please, specify a port"
	exit 1
fi
while read ip n
do
   nc -z -v -w1 "$ip" "$2"

#   [[ -z "$resolvedIP" ]] && echo "$ip" lookup failure || echo "$ip" resolved to "$resolvedIP"
done < $1