Blog

Modify your static IP on Ubuntu server

Sysadmin

This seems easy, but... When you modify your static IP address in /etc/network/interfaces, the old IP is not removed. The new IP is simply added to your interface.

Disable user registration in your Laravel application

Laravel

Laravel is a powerful framework that comes with a lot of boilerplate code to handle most common cases. One of these is users management (register, login, reset password etc.)

Easy testing with Python doctest and GitLab

Python GitLab

When developing some new Python code, you will usually open another terminal to test your function or class using a Python shell... and repeat until you obtain the expected result.

Type hinting in Python, and testing with GitLab

Python GitLab

Python is a dynamically typed language, meaning that the type of a variable can change during execution. This participates to the user friendliness of the language.

Collecting and processing NetFlow on Ubuntu

NetFlow is a feature that was introduced on Cisco routers around 1996 that provides the ability to collect and process network traffic summary.

CyberSecurity Tournament 2020

News

In February 2020, ULB will organize a CyberSecurity Tournament for students. This is a unique opportunity to challenge your skills and get in touch with major companies of the field.

Create a local Python pip repository

Python

Python is a very interesting programming language because it is possible to prototype a lot of things in a few minutes. The Python Package manager, called pip, is a very simple tool that allows the user to import/install easily any Python package and its dependencies.

Create a local apt-mirror for offline usage

In some cases, it is necessary to work on offline machines because of sensitive data for example. To install a Ubuntu version on an offline computer is quite easy. Problems begin when it is needed to install some programs/debian packages for your development. With the default configuration, it is not possible to install anything without an Internet connection.

Generate ROC curve and compute AUC in Java

Java

It is very common to implement a model to classify elements in different categories. A very important step in classification is the evaluation of the model efficiency.

MongoDB sharding on a single server

Sharding is a method for distributing data (and load) across multiple machines. In this blog post we show how to test MongoDB sharding by running multiple MongoDB instances on a single Ubuntu 16.04 machine.

Apache Spark MapReduce with PHP

PHP

When it comes to Big Data processing, I'm a huge fan of the Apache Spark project. Spark is a very powerful tool to analyse very large datasets in parallel, and at the same time it provides a nice API that allows to write clean distributed code.

How does WPA/WPA2 WiFi security work, and how to crack it?

Offensive Security

The number of Wi-Fi access points is bigger day after day. Everywhere in the street, it is possible to see a lot of Access Point (AP)