How to Install HashiCorp Vault OSS on AWS EC2 (Ubuntu 24.04)
This guide installs Vault OSS on an EC2 Ubuntu 24.04 instance, enables AWS KMS auto-unseal, and exposes the Vault UI
Identity, Security & PKI
AWS
Networking & Connectivity
WireGuard VPN on OPNsense 25.1
Architecture Overview: This setup runs WireGuard on an AWS EC2-based OPNsense firewall (WireGuard server) in the public subnet (10.0.0.0/20). The
Networking & Connectivity
Configure BIND on OPNsense 25.1 as Internal DNS Server for AWS VPC
Overview Component Value Internal domain maksonlee.com DNS server IP 10.0.128.4 (OPNsense LAN IP) System DNS 127.0.0.1 (loopback) Forwarder AWS DNS
Networking & Connectivity
Deploy OPNsense 25.1 Nano on AWS
Architecture Overview: Interface Subnet Private IP Public IP WAN (ena0) test-subnet-public1-ap-south-1a 10.0.0.4 Yes LAN (ena1) test-subnet-private1-ap-south-1a 10.0.128.4 No 1. Launch
Networking & Connectivity
Create an EC2 AMI from Official OPNsense 25.1 Nano (raw) Image
This post shows how to convert the official OPNsense 25.1 Nano disk image (.img.bz2) into an EC2 AMI using VM
DevOps & Software Delivery
Trigger AWS CodeBuild in Jenkins Pipeline
1. Verify AWS Account Permissions Your IAM user should have the policy with the following permissions: Replace ACCOUNT with your
Android & Mobile Development
Build Android App from GitHub Repository Using AWS CodeBuild
1. Create an AWS CodeBuild Project Go to AWS Console → CodeBuild. Click Create project. Fill in the Project Name