Blog

Apache : log real IP addresses behind a reverse proxy

Kubernetes

It's quite common now to run your web application behind a reverse proxy or a loadbalancer. This is typically the case if you are running your application in a Kubernetes cluster. In this case, the IP address that is logged by Apache is the IP of the proxy server, which is quite misleading and useless. To get Apache to log the real IP address of the clients, you will have to enable and configure the module remoteip.

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Laravel optimization : reduce CSS size

Laravel

CSS files are a render blocking resource: the browser waits for your CSS files to be downloaded before rendering the page. This means that, as long as the browser is downloading CSS, the user is waiting in front of a black page...

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2021 in numbers

News

2021 was (again) a special year for everybody. For us as well, but we managed to achieve some results! Here is 2021@cylab.be...

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Run a development environment for Laravel with docker-compose

Laravel Docker

Developing and testing a Laravel project requires to install a substantial number of tools, with the correct version of each: PHP, composer, MySQL database, NPM etc. Moreover, for a substantial project, you will also have to run and test a queue worker and a scheduler. This can become quite complex and long to setup. In this blog post we show how to use docker-compose to run all of these in a single command line...

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We are hiring an IT expert

News Jobs

We are hiring a new colleague!

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Defer, async and inline javascript

JavaScript

In this blog post, we explain and illustrate the effect of the defer and async attributes.

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Save the planet : disable Facebook email notifications!

Green Computing

I consider myself a moderate Facebook user : I check my account roughly once a week, and I actually post something on my wall once a month, at best... And still, I receive approximately 20 emails per day notifying me that "Chuck Norris is a new friend suggestion" or "Mark Zuckerberg posted a new update". This is represents more than 7000 emails per year.

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Configure rolling backups with rsnapshot

Sysadmin

In this blog post we show how to use rsnapshot to configure nice and easy rolling backups.

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Download BigBlueButton recordings as videos

Teaching

BigBlueButton is a great platform for online teaching. It has many features like built-in drawing tools (even supports multi-user drawing), breakout rooms, chat, shared notes, polling, screen sharing, session recording etc. But, the recorded sessions are no actual videos.

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We are looking for 2 new colleagues!

News Jobs

We are starting 2 new research projects:

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Log management with Loki : getting started

Monitoring DevOps

Loki is a log database developed by Grafana Labs. It's similar to Elasticsearch, with some major conceptual differences:

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ICONS2021 : Best paper award!

News

Our paper entitled Adversarial Training for Deep Learning-based Intrusion Detection Systems presented at the International Conference on Systesm (ICONS2021) has received the best paper award!

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