How do I configure AWS Application load balancer and NAT gateway to have the public IP

Question

so currently in our infrastructure we are using ECS with an application load balancer for inbound traffic and a NAT gateway for outbound traffic. I am looking to configure both inbound and outbound traffic to have the same public IP address but I am not sure how this is done as I've tried may different ways to achieve this but nothing seemed to have worked. If we take a look at the below image our infrastructure is similar except that we us EC2 and not fargate as we prefer to maintain our own instances

Screen shot

I would be very thankful if anyone could please help me out with this

score 1 · Accepted Answer · answered Nov 18 '20 at 19:36

1

I don’t think this is possible. External traffic is always routed though a NAT gateway, and incoming either though unknown number of ever changing load balancers or directly to IP of the e.g. EC2 instance.

answered Nov 18 '20 at 19:36

Tomek Klas

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Logically yes, its not possible but the diagram on the aws website seems to be configured that way which is very puzzling to me. – Bharath Dundi Nov 18 '20 at 21:40
@BharathDundi Diagram must have mistake. – Marcin Nov 18 '20 at 22:21
Yeah I guess so. Thank you so much for your help :) – Bharath Dundi Nov 19 '20 at 04:51
@BharathDundi The duplicate public IP in that diagram is a mistake. Please post a message at the feedback link at the bottom of the page you screenshotted. – Mark B Nov 19 '20 at 15:23
Sure Mark I will do that, thank you for all your help – Bharath Dundi Nov 19 '20 at 18:46

How do I configure AWS Application load balancer and NAT gateway to have the public IP

1 Answers1