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I've been asked to look at some non-technical friends' AWS account because they're worried about their costs, but I'm struggling to find where they're spending their money. In particular I'm getting quite confused because the IP address of the website (according to the network inspector tools in my browser and nslookup) is different to every public IP address I can see on their AWS account. Is it possible that any of the services they are using have a public IP address that matches their site, which perhaps forward requests? Even then the usage doesn't match the bills. I've tried using traceroute but it didn't help.

The services (as listed on their AWS billing page) they're using that I think might in anyway be related to the problem are: Elastic Container Service (ECS), Registrar, EC2 Elastic Load Balancer (ELB), EC2, VPC, EC2 Container Registry (ECR), CloudWatch, S3, Route 53, API Gateway, Lambda, CloudFront, and Relational Database Service (RDS).

Harry Hudson
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    *"the IP address of the website is different to every public IP address I can see on their AWS account."* - That is commonly the case when a website uses **CDN** functionality such as Cloudflare or the AWS equivalent CloudFront, the latter of which is listed in your billing overview. – HBruijn Mar 22 '23 at 19:31
  • @HBruijn thanks, I'll give that a closer look – Harry Hudson Mar 22 '23 at 19:35
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    Use the Cost Explorer tool in the AWS console, group costs by usage. – Tim Mar 22 '23 at 19:57
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    On top of CDN, the ELBs will have their own IPs that aren't Elastic IPs in the console. – ceejayoz Mar 22 '23 at 20:39

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