Linux - My Blog

Adding Ingress Rules to an AWS Security Group

In this post we will look at how to modify the ingress rules for a security group using the AWS CLI to add and remove http and ssh access. In order to test and verify we'll create an EC2 instance running a basic webpage

AWS

Running AWS CLI Client in Docker

In this post, which is a followup to the one here we'll run the AWS CLI client in a Docker container rather then install it on our host machine. The lab assumes that Docker is already installed and running on the machine we are

AWS

Installation of AWS CLI

There are a number of ways of interacting with AWS and in this post we'll run through the installation of the CLI client under Ubuntu 20.04. This will allow the running of AWS commands within a standard Bash terminal. In this post we'll

Linux

OpenVPN using PFSense

This post is a follow up to the previous one that described the use of tunnelling of an OpenVPN link to encrypt a connection from a client on the 192.168.200.0/24 network to a web server on 172.16.0.0/

Linux

OpenVPN using Vagrant

OpenVPN is a popular opensource VPN solution and in this post we'll set up a Lab with a Virtual Machine acting as a gateway to securely access a Web Server running on the 172.16.0.0/24 network from a client. The lab

Kubernetes

Using Netcat for Testing Container Connectivity

This post examines making use of the netcat utility to confirm connectivity between containers running within a Kubernetes cluster. Netcat is a really useful tool for testing network connectivity which is part of the standard Busybox image. The tool can be used for setting

Linux

Basic Overview of Multipass

Multipass is a tool created by Canonical that makes it easy to create Virtual Machines which by default run the latest LTS version of Ubuntu. On Linux it uses KVM as it's hypervisor and if it isn't already present on the Host can be

Linux

Creating Dynamic Routers in Linux

In this post we will create two Virtual Machines that will act as Routers running OSPF using FRRouting which is a fork of the older Quagga package. The Routers will

Vagrant

Creating an HAProxy Load Balancer

In this post we'll set up a simple Load Balancer, using HAProxy, that will connect two Virtual Machines running NGINX. Each of the backend machines will serve a slightly different page to confirm they are both reachable via the ingress of HAProxy. The lab