(DNS) zonetransfer_check.sh

#!/bin/bash
# Simple Zone Transfer Bash Script
# $1 is first argument, if not given after bash script
# Check if argument was given, if not, print usage

if [ -z "$1" ]; then
	echo "[*] Simple Zone Transfer script"
	echo "[*] Usage    : $0 <domain name>"
	exit 0
fi

# If argument was given, identify the DNS servers for the domain
# For each of these servers, attempt a zone transfer

for server in $(host -t ns $1 | cut -d" " -f4); do
	host -l $1 $server | grep "has address"
done