Antoine Aflalo

My journey in the computer world

Category

Linux

DNS-over-HTTPS with Pi-Hole

Introduction In my previous article/tutorial, I’ve explained how to setup your own DNS-over-HTTPS (DoH) server using Nginx, Certbot, dnscrypt-proxy and doh-server. In this article I’ll explain to you how to add Pi-Hole into the mix to block the unwanted advertising…. Continue Reading →

Tutorial to setup your own DNS-over-HTTPS (DoH) server

Introduction Traditional DNS queries and responses are sent over UDP or TCP without encryption. This is vulnerable to eavesdropping and spoofing (including DNS-based Internet filtering). Responses from recursive resolvers to clients are the most vulnerable to undesired or malicious changes,… Continue Reading →

Elastic Stack with TLS

Introduction At work, we decided to give a try to the Elastic Stack (Elastic Search, Logstash and Filebeat in our case) while having the whole communication secured with TLS. TLS Protocol You might at this point wonder how all the… Continue Reading →

Best practices to secure your WordPress CMS

When you manage a WordPress site, you see the worst that the internet can bring on you. When it’s not blatant comment spam, it’s some brute forcing to try to get admin access to your WordPress. I posted about this… Continue Reading →

Fail2ban and CloudFlare

In a previous blog post (Fail2ban + Tarpit), I explained how to setup a Tarpit for Fail2ban to use it against the attacker that got banned multiple times. It works great especially in conjunction with WP Fail2ban, a fail2ban plugin for… Continue Reading →

Let’s Encrypt with Dehydrated: DNS-01

In my previous guide on dehydrated, the bash client for let’s encrypt, I’ve only touched on the DNS-01 feature. Upon further investigation and usage of said feature I give you this guide. DNS-01 DNS-01 is another type of verification of… Continue Reading →

XenServer Migrate Script

Where I work, we’re using XenServer to easily create and manage our VM. Some of our servers are quite old, and we bought new ones to replace them and we needed to migrate our VM. Since the first architect didn’t… Continue Reading →

Update Mailcatcher (exim, courrier, rainloop)

I took the time to update my mailcatcher to the last version of Ubuntu, Xenial. I also wanted to update Rainloop to the last stable version to use the latest patches. As always it’s available in the hub: MailCatcher on… Continue Reading →

Dehydrated: a bash client for Let’s Encrypt

Dehydrated was firstly known as letsencrypt.sh but because letsencrypt is a trademark, they decided to rename the project, but keep the excellent features. Purpose If you’re already familiar with let’s encrypt and the ACME protocol, you can go directly to… Continue Reading →

Docker Image for a IMAP/SMTP MailCatcher

At work, I’m working on a reply-to system. Letting our user answer to email and treat those replies as messages in a thread. This feature is available on a lot of platform like GitHub, GitLab, etc … nothing new. We… Continue Reading →

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