My NAT Usage per day is ~ 800 GB but using the above information, I was able to track 3GB of usage for a 2 day time period. I only have NAT Gateway logs in cloudwatch and not the VPC Flow logs. Also, there is a private IP 172.168.x.x which is doing a lot of data transfer but my VPC only has 10.0.x.x private IP range. AWS Resource finder service also was not able to track the IP to a service inside my account.
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How do I identify which of my private IPs sends the most bytes to public IP 1.2.3.4?
Using the instructions here I have identified 1.2.3.4 (example, not the real IP) as a destination for lots of bytes.
Now I want to know from which internal IP(s) this traffic is coming from.
Seems like these instructions only cover traffic to and from the NAT, but I want data for traffic through the NAT.
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