CODEWITHSUNDEEP
amazon-web-servicesaws-api-gateway
dev
dev

Reputation: 21

AWS Apigateway does have any static IP address

I have an aws api gateway which has a custom domain. I have to access one of client's api from AWS api gateway. Those api's will be accessible based on IP address. If I want to access those api's from aws, I need to know the Ip address of my AWS apigateway. But I am not sure where I can get this. Any possibilities to get the static IP address of AWS apigateway?

Upvotes: 0

Views: 4779

Answers (2)

Mark B
Mark B

Reputation: 200446

After you clarified your requirements in the comments above it appears that you need your AWS Lambda function, which is being triggered by API Gateway, to appear to a third party as if it has a static outgoing IP address.

The solution to this is to configure your Lambda function to run in your VPC, in a private subnet of your VPC that has a route to a NAT Gateway. Then all outgoing connections from the Lambda function which access resources outside your VPC will use the NAT Gateway's static IP address.

Upvotes: 1

Bram
Bram

Reputation: 4532

Unfortunately the API Gateway doesn't support this scenario of invoking an IP-whitelisted API directly. Basically any AWS instance can be used to make the API call and there's many IPs that AWS is using for this.

There are some ways around this, depending on your situation;

  • If the server you are reaching is within your own VPC, you could create a VPC link (with NLB) and circumvent the IP-whitelist issue. This solution only works for resources within your control.

  • If the server is external and is expecting a static IP, your best solution is to make your call from within a VPC. To make sure you have a static public IP you can use an elastic IP and a NAT Gateway in your VPC (more info here). To invoke the external API triggered from the API Gateway you can use a Lambda but because of the VPC a cold start will be quite slow, >10s. To make sure the API will be responding fast you can use an EC2 instance or ECS service on Fargate.

Upvotes: 1

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