By Ronnie Quan

Overview

In this article, we will explore AWS EKS cost optimization through auto scaling and EC2 spot instances.

Spot Instances are spare Amazon EC2 capacity that allows customers to save up to 90% over On-Demand prices. …

By Ronnie Quan

Overview

Nov. 2020 in North Carolina

In the article, we will explore VWAN multiple transit routing scenarios and use Azure firewall as proxy.

  • Between ExpressRoute and site to site VPN
  • VNet-to-VNet transit routing through virtual hub
  • Filter traffic outbound to Internet

Azure Virtual WAN

By Ronnie Quan

Overview

Real Flowers 2018 in San Francisco

Time sync is important for security and event correlation. Sometimes it is used for distributed transactions implementation. Time accuracy between multiple computer systems is achieved through synchronization.

In this blog post, I will

  • Inspect AWS EC2 Redhat 8 VM, to understand how time sync is configured.
  • Inspect…

By Ronnie Quan

Overview

Virtual machines (VMs) in Azure can have multiple virtual network interface cards (NICs) attached to them. A common scenario is to have different subnets for front-end and back-end connectivity.

To send to or from a secondary network interface, you have to manually add persistent routes to the…

By Ronnie Quan

Overview

In this article we will explore AWS CloudFront and AWS WAF. We will discuss security, logging and monitoring, resilience and availability, and configuration management.

WAF Multi-Layer Web Application Security

The edge network is the first layer of policy enforcement and should be used for broad security policy enforcement. This is the ideal…

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