nsupdate-info

nsupdate-info

#! /usr/bin/env bash

# Update script for nsupdate.info dynamic dns

DOMAIN=$1
TOKEN=$2

if [ -z "$DOMAIN" -o -z "$TOKEN" ] ; then
        echo "Usage: "`basename $0`" <nsupdate.info domain> <token>" 
        exit 1
fi


CURRENT_DNS_IP=`dig +noall +answer @ns1.nerdpol.io. A $DOMAIN | sed -E 's/.*\s+IN\s+A\s+(((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))/\1/g'`
CURRENT_EXTERNAL_IP=`curl -s https://ipv4.nsupdate.info/myip`

if [ "$CURRENT_DNS_IP" != "$CURRENT_EXTERNAL_IP" ] ; then
        echo 
        echo "Changing IP from $CURRENT_DNS_IP to $CURRENT_EXTERNAL_IP"
        #curl -u "${DOMAIN}:${TOKEN}" https://ipv4.nsupdate.info/nic/update
        if [ "$?" != "0" ] ; then
                echo "Error updating IP" 
                exit 1
        fi
else 
        echo "DNS Up-to-date"
fi