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Can an Alexa Skill Lambda function have a static public IP address?

0

Hi, I am in the mid stages of developing an Alexa Skill and the Lambda function must make an API request to a public server that only allows whitelisted IP addresses.

So here are my requirements:

  1. My Alexa Skill uses a Lambda function, and so it must be able to receive trigger requests from the alexa-appkit.amazon.com service pricincipal (which uses the ARN of my Lambda function to send triggers).
  2. At the same time, if my lambda function makes a request to an API on the internet, it needs to come from a static public IP.

I have tried setting up a VPC, but I am struggling to understand how I am to attach my Lambda function to a VPC subnet to NAT out to a static public IP while also allowing it to be reachable to be triggered by the Alexa service principal. Is this even possible?

Topics
Networking & Content DeliveryServerlessComputeMicroservices
Tags
Amazon VPCAWS LambdaNetworking & Content DeliveryMicroservices
Language
English
justinH
asked a year ago311 views
1 Answer
0

Have you checked this: https://docs.aws.amazon.com/prescriptive-guidance/latest/patterns/generate-a-static-outbound-ip-address-using-a-lambda-function-amazon-vpc-and-a-serverless-architecture.html

profile pictureAWS
EXPERT
Tushar_J
answered a year ago
  • justinH
    a year ago

    I did something very similar, but the Alexa service could not reach my Lamda function anymore to trigger it. The way it works without a VPC is you just register your Lambda function ARN with the Alexa Service, but I don't see how the Alexa Service can reach it with an ARN if it is behind a NAT gateway now. Maybe I misconfigured something though.

  • Tushar_J EXPERT
    a year ago

    Make sure you updated the route tables as explained in the article.

  • justinH
    a year ago

    Wouldn't the Alexa Service now have to send triggers to the public IP address instead? Or would it still be able to send triggers via ARN?

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