VMC: Understand GFW on Customer Managed CGW (Tier-1 Gateway)

A conversation about how Gateway Firewall works on a Customer Managed Compute Gateway (CGW) i.e. custom Tier-1 Gateway implemented on VMware Cloud On AWS.

CuriousTechie: Hello IT Guy, I am exploring the functionality of Customer Managed CGW in VMConAWS and I am confused about the Gateway Firewall implementation. Can we discuss how it is implemented?

ITGuy: Sure! Did you get a chance to read this blog post here, it provides a good description of the feature and its functionality. On a high level the topology looks like this.

CuriousTechie: Yes, I have read this post, but the implementation of Gateway Firewall is still not clear to me. For example, when I try to configure rules on CGW, I get the option in the Applied To field to select the uplink where I want to apply the rule as shown below.

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