As a learning practice, I created a small application that picks random questions from AWS Knowledge Centre. I have not polished the UI yet, so it looks a bit ugly 😉 But it does what I need - Test myself with a couple random AWS questions. Give it a go if you would like to … Continue reading AWS Quiz App
Two Examples of using AWS Network Firewall
AWS Network Firewall is a high-available and scalable firewall service that provides network protections for VPC, which is a supplement to the existing security services. Security group protects computing resources (EC2, Lambda, RDS...)NACL (Network Access Control List) protects subnetsWAF (Web Application Firewall) and Shield protects frontend resources (ELB, CloudFound, API Gateway) There are quite a … Continue reading Two Examples of using AWS Network Firewall
Yum gets ‘HTTPS Error 403 – Forbidden’ error in Amazon Linux 2
If you use S3 endpoint not NAT/Proxy to access the Amazon yum repository, then this post should be helpful to you. We use S3 endpoint to access Amazon repositories, and we noticed that any yum operations failed with the 'HTTPS Error 403 - Forbidden' error in the EC2 instances that are launched from the latest … Continue reading Yum gets ‘HTTPS Error 403 – Forbidden’ error in Amazon Linux 2
Create a Slack FAQ Bot in AWS Lambda
I recently wrote a simple Slack FAQ bot that can answer users' questions automatically. User is able to find the knowledge base articles and relevant shortcut in the ticketing system with just one click. This is how it looks like in Slack. And it is also super easy to customize the Bot to fit different … Continue reading Create a Slack FAQ Bot in AWS Lambda
Setup AWS “Instance Profile” for on-prem servers
I assume you already knew what the EC2 instance profile is. Basically, the instance profile defines the permissions that a EC instance has. As it is associated with an IAM role which has a bunch of IAM policies attached. And the AWS credential in the EC2 metadata is automatically rotated by the instance profile. In … Continue reading Setup AWS “Instance Profile” for on-prem servers
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