Protected SKY IP checker. Check if the given IP is blacklisted via http://psky.me/

psky.sh

#!/bin/sh
if [[ -z $1 ]] ; then
	echo "psky.sh <IP>"
	echo ""
	echo "Protected SKY IP checker"
	echo "Check if the given IP is blacklisted"
	echo ""
	return 1;
fi
REVERSE=$(echo $1 | awk -F '.' '{ print $4 "." $3 "." $2 "." $1 }')
STATUS=$(dig $REVERSE.bad.psky.me +short $1)
if [ "$STATUS" == "NOERROR" ] ; then
	echo "OK";
elif [ "$STATUS" == "127.0.0.2" ] || [ "$STATUS" == "127.0.0.3" ] ; then
	echo "SPAM";
else
	echo "UNKNOWN";
fi