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

2020 Christmas Day in North Carolina

Azure route server simplifies operations management of your network appliances, enables network appliances to exchange route information with Azure virtual networks dynamically. …


By Ronnie Quan

Overview

Mar. 2021 in North Carolina

We will look at iperf3, tcpping, ping, traceroute, tcptraceroute and nmap, we will measure latency and bandwidth.

Installation

iperf3

Redhat iperf or iperf3 installation, in case missing the public key for validate the signing, download RPM-GPG-KEY-EPEL-7 from https://dl.fedoraproject.org/pub/epel and put into /etc/pki/rpm-gpg directory

yum install iperf3 -y

tcpping


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…


By Ronnie Quan

Overview

This blog post is the lab steps for the other blog post Zone Apex and Webserver Redirect. By Ronnie Quan | by Cloud Journey | Sep, 2021 | Medium

We will list steps to configure resources in multiple AWS accounts, including AWS global accelerator, AWS ALB for…


By Ronnie Quan

Overview

When you host your website in the cloud infrastructure or by third party, it comes with vendor specific DNS name, e.g *.amazonaws.com. You will typically want to create alias in your DNS zone, for example, alias www.xyz.com points to canonical name <sth.sth>.amazonaws.com.

Your customer might also expect…


By Ronnie Quan

Overview

Cloud computing technology brings new opportunity to you, you wouldn’t have to be in the enterprise infrastructure team, you can manage your own virtual machine, you can do network design for your solution, you can deploy your compute, storage and load balancer components.

There is endless learning…


By Ronnie Quan

Overview

In this article, we summarize Route 53 features and compare with Azure services. Seems to me AWS invested more in its Route 53 product.

We will discuss some of the features in more detail, including

  • public and private hosted zones
  • DNS query logging
  • DNSSEC
  • Route 53 resolver

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