Webserver on Holmq.dk

Caddy + GeoIP + Fail2Ban (Pushover) — Setup Notes

Tue, 27 Jan 2026 13:50:37 +0100

This document describes:

Building a custom Caddy container image with the GeoIP plugin (so Caddy can enrich access logs with country code/name). - Configuring Caddy JSON access logs to include GeoIP fields. - Setting up Fail2Ban to parse Caddy logs and send Pushover notifications with GeoIP info via mmdblookup. - Optional “SOC dashboard” style fields (severity, jail type, ban time, until).

Tips and trick using curl

Fri, 18 Aug 2023 13:01:44 +0200

Download files

curl -O https://test.example.com/madplan.json
curl -O -L http://test.example.com/madplan.json # Follows links. In this example the http request will be redirected to https
curl -o test.json https://test.example.com/test.json # Saves the file as test.json

Send host header

Usefull when the server is hosting multiple domains

Nginx Active-Passive Cluster

Tue, 21 Feb 2023 15:07:10 +0100

How I built my own nginx cluster

Nginx Syntax Highlight in Vim

Wed, 22 Sep 2021 15:12:16 +0200

Make your vim colourful when editing nginx configuration files

Let's Encrypt certificates + Nginx + Cloudflare

Fri, 20 Aug 2021 00:00:00 +0000

This is how I have setup automatic certificate renewal on my linux Webserver. I’m using Cloudflare as a DNS provider and are using their API Tokens to verify ownership of my domain, when requesting a certificate from Let’s Encrypt

Nginx - Redirect to https

Mon, 18 Nov 2019 00:00:00 +0000

Insert this code into your Nginx server {} block

Hotlink Protection with Nginx

Fri, 15 Nov 2019 00:00:00 +0000

Insert this code into your Nginx server {} block