Linux

Ansible: Perform network availability check

05/01/2025 by Andrew Roderos Leave a Comment

In my previous post, we explored validating IP addresses and conducting network availability checks on a firewall. While these checks are valid, they don't provide a comprehensive view of the network’s overall status, especially in bigger networks. In this post, we'll explore a playbook that can be incorporated to perform network availability checks. However, this may not be valid in some environments where ICMP is not allowed. The Ansible playbook This Ansible playbook complements the …

How to implement Duo Security MFA

08/08/2020 by Andrew Roderos 3 Comments

If you follow me on Instagram, then you know that I successfully implemented Duo MFA in my home lab. I've set up two environments, one with FreeRADIUS, and the other using Windows AD, as the primary authentication source. In today's article, I'm going to demonstrate how to implement Duo Security MFA with FreeRADIUS as the primary authentication source. Introduction As you may already know, multi-factor authentication (MFA) isn't new. Back in the day, the most popular MFA …

Blocking ads network-wide with Pi-hole

03/29/2020 by Andrew Roderos 2 Comments

I think it's safe to say that the majority of people hate ads. However, it is a necessary evil since we all love free stuff. Whether that's YouTube content, email service, etc., we want it for free. Some people install ad blocker add-ons on their browsers, and they work great. Some tech-savvy folks go even further by blocking ads network-wide. Today's article is how to block ads network-wide. Why block ads? I love ads! Said no one, ever. People have different opinions about …

Deploying TACACS+ on a Docker container

11/21/2019 by Andrew Roderos Leave a Comment

Back in 2011, I wrote how to configure tac_plus (TACACS+ daemon) on an Ubuntu server. Then two years ago, I wrote an article about adding two-factor authentication (2FA) to TACACS+. Today, I'm going to talk about deploying TACACS+ on a Docker container. While I've written migrating FreeRADIUS with 2FA to a Docker container article in the past, I'd still consider myself a newbie. I don't deal with Docker daily to be well-versed. Related: VMware ESXi Home Lab – Intel NUC …