Blocks - AWS Cost Optimization

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Agentic Devops (Major Tom)

Major Tom for cloud control. Our agentic DevOps optimizes cloud costs in the background. Monitors risk. Automated cloud control for your peace of mind.

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Jan

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Major Tom

# major-tomcost optimization findings & critical security

Major TomApp9:14 AM

[Cost] Delete idle NAT Gateway to save $499/yr

The NAT Gateway gw-prod-b in eu-central-1 of the eu-prod account has been idle for 90 days with zero bytes processed — no service has used it in that time. Delete this gateway.

1 reply

Major TomApp9:14 AM

Blast radius — non-disruptive, reversible. 0 connections in 90d.

Fix — Managed by Terraform (infra/network/main.tf)

- resource "aws_nat_gateway" "gw_prod_b" { … }

Paste into Agent:

Remove aws_nat_gateway "gw_prod_b" + route entries in infra/network/main.tf.

3 min later

Jan9:17 AM

Just updated the Terraform, can you check?

Major TomApp9:17 AM

Verified ✅ $499/yr saved.

Major TomApp10:02 AM

[Security] Critical: EC2 Instance Reachable From Internet, Allowing Denial Of Service Attacks And Undetected Data Exfiltration

Instance ec2-checkout-1 has SSH exposed to 0.0.0.0/0 on public IP address 18.185.113.24. Any host on the internet can attempt to connect, enabling brute-force attacks, exploitation of vulnerable services, and lateral movement into the private network.

1 reply

Major TomApp10:02 AM

Blast radius — Restricting SSH access on security group sg-223 to prevent unauthorized internet access. Non-disruptive.

Fix — Managed by Terraform (infra/checkout/main.tf)

+ cidr_demo = ["YOUR_TRUSTED_IP/32"]

Paste into Agent:

Find the security group "sg-223" in infra/checkout/main.tf and update cidr_demo from ["0.0.0.0/0"] to ["YOUR_TRUSTED_IP/32"].

Jan10:48 AM

@MajorTom Give me yesterday's P95 latency on all customer-facing LBs.

Major TomApp10:48 AM

Found 2 load balancers: checkout-alb P95 142 ms, dashboard-alb P95 218 ms. Both within SLO.

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