monitornsipchange

#!/bin/bash
# Monitor nameservers for IP changes and report via e-mail if some nameserve IP changes
#set -exu
thisscriptdir=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
adminmail=mail@here

ns1="ns1.domain.tld"
ns1ip="1.2.3.4"

ns2="ns2.domain.tld"
ns2ip="5.6.7.8"

digns1="$(dig +short a $ns1)"
digns2="$(dig +short a $ns2)"

if [[ "$digns1" == "" || "$digns2" == "" ]];then
exit
fi

if [[ "$digns1" != *"$ns1ip"* ]];then echo "$thisscriptdir/monitornsipchange discovered that the $ns1 no longer points to $ns1ip . It points to: $digns1 . Update Cloudflare / DNS zone / registar settings?"|mail -s "NS IP changed" $adminmail;fi

if [[ "$digns2" != *"$ns2ip"* ]];then echo "$thisscriptdir/monitornsipchange discovered that the $ns2 no longer points to $ns2ip . It points to: $digns2 . Update Cloudflare / DNS zone / registar settings?"|mail -s "NS IP changed" $adminmail;fi