To alias to the root record of the domain name, you leave the data value blank. This will be the host for your domain which is actually a computer within your domain.
If your IP was ever to change you would only have to change one A record.
We will add a CNAME record to the domain for maps to the root record of the domain name.
Also note that during some configuration changes (commits) on the Palo Alto, the DNS proxy was not working anymore at all!
My previous article was about bulk DNS records creation in forward lookup zone.
These are usually referred to as alias records since they usually map an alias to its canonical name.
The name server does handle these queries differently from an A record.Systems that have a static IP should usually have a TTL of 1800 or higher.Systems that have a dynamic IP should usually have a TTL of 1800 of less.This time we will focus on the same activity but in reverse lookup zone.In my opinion this kind of task is much more frequently used that the previous on. Because in regular basis when you create host (A) record in forward lookup zone you don’t care about pointer (PTR) record in reverse lookup zone.I tested a normal DNS name Packet Capture), these are two screenshots from Wireshark that show the connections to the different DNS servers for the different use cases.