DNS – Curious-Techies

A conversation about how to configure GSLB service to provide the appropriate Public or Private IP as per the incoming DNS request.

CuriousTechie: Hello IT Guy, I am in a planning phase for a GSLB implementation and have some doubts around the DNS services, can you help me with it.

ITGuy: Sure! I recently had a conversation around GSLB which you can find here.

CuriousTechie: Yes! I have a fair understanding of GSLB, but I am looking for some specifics around how the GSLB DNS service determines which IP (Public or Private) it provides in the DNS response for Internal and External users. Can you help me to get some clarity and show the actual configuration?

CuriousTechie: Hey, I am learning to setup Global Server Load Balancing on AVI. I do not have much experience on GSLB especially with AVI or NSX ALB, can you help me understand the basic concept of GSLB with NSX ALB?

ITGuy: Sure! Are you good with how GSLB works irrespective of the Load Balancer?

CuriousTechie: I know some basics, but a white board refresher will be helpful.

ITGuy: Sure! Let’s see what happens when you type a URL in your favourite web browser. You input a URL lets say “curioustechies.in”and DNS does its magic and run multiple DNS queries to find you the IP of the web site/server that you are looking for. I believe you have a fair understanding of how DNS works so will not go much deep into it. OK?