I was wondering if there was a Sensor or a script, I could use to test if a FQDn resolves to a specific IP over an External defined DNS, so if it doesn't resolve to that IP anymore it's gonna give me a warning.
FQDN: pbx.example.com DNS: 184.108.40.206 (Google DNS) IP: 220.127.116.11(example normal PBX)
If the IP would change to 456.456.456.456(example failover PBX) a warning would get triggered.
The reason it has to be an external DNS Server is, our internal DNS Server would always resolve it to our normal PBX and would never change to be the failover one.
Thanks for any ideas or answers in advance