Is Azure Load balancer act like reverse proxy?

Question

I would like to know when we have a backend vm behind Az lb do we see original client ip in the backend or we see az lb ip address as source?

Is load balancer act as reverse proxy?

How about CDN , fd , traffic manager , application gateway? Are they also reverse proxies which replace the Client ip with its own pub ip ?

Please help understanding this

Answer 1

Hello @53654583

Welcome to Microsoft Q&A Platform,

Azure load balancer works at layer4 forwarding traffic to it's backend VMs, it doesn't have reverse proxy capabilities. For that you need an application gateway.

For reference:

https://learn.microsoft.com/en-us/azure/architecture/guide/technology-choices/load-balancing-overview

https://learn.microsoft.com/en-us/azure/application-gateway/overview

I hope this helps!

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