# Suboptimal Region for Internet-Only EC2 Instance

Canonical: https://www.pointfive.co/efficiency-hub/inefficiencies/suboptimal-region-for-internet-only-ec2-instance

[Cloud Efficiency Hub](https://www.pointfive.co/efficiency-hub) 

# Suboptimal Region for Internet-Only EC2 Instance

## Explanation

When an EC2 instance is dedicated primarily to internet-facing traffic, regional differences in data transfer pricing can drive a substantial portion of total costs. Hosting such workloads in a region with higher egress rates leads to elevated expenses without improving performance. Migrating the workload to a lower-cost region can yield significant savings while maintaining equivalent service quality, especially when no strict latency or compliance requirements dictate the original location.

## Relevant Billing Model

EC2 instances are billed per second based on the selected instance type, operating system, and pricing model (On-Demand, Reserved, or Spot). Data transfer out to the public internet is billed separately per GB, and rates vary by AWS region. Some regions have significantly higher internet egress charges, which can disproportionately increase costs for internet-heavy workloads.

## Detection

- Identify EC2 instances whose primary traffic flows are outbound to the public internet rather than within AWS or private networks

- Review the region associated with each instance and compare public Data Transfer Out pricing against lower-cost regions

- Assess latency requirements, regulatory considerations, and service availability constraints that may impact regional choices

- Evaluate application dependencies, user location distribution, and DNS configurations to determine feasibility of migration

- Validate migration plans with infrastructure, networking, and application teams before execution

## Remediation

Migrate internet-focused EC2 instances to regions with lower Data Transfer Out pricing to optimize costs. Use methods such as AMI copies, EBS snapshots, or infrastructure-as-code templates to deploy the instance in the new region. Update DNS records, security groups, IAM roles, and route configurations as needed to complete the migration. Monitor performance after relocation to ensure that user experience and application behavior remain stable.

## Relevant Documentation

- [Amazon EC2 Documentation](https://docs.aws.amazon.com/ec2/index.html/%22)

- [AWS Data Transfer Pricing](https://aws.amazon.com/ec2/pricing/on-demand/#Data_Transfer\)

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## At a glance

Reference

CER-0088

Cloud provider

AWS

Service

AWS EC2

Category

[Compute](https://www.pointfive.co/efficiency-hub/service-category/compute)

Inefficiency type

Inefficient Architecture

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