Mot-clé - Computing

Fil des billets - Fil des commentaires

jeudi, 31 août 2017

Poor internet performance

Performance_Decrease.png

Internet Service Provider : Swisscom Subscription : inOne Internet S (the smallest access available) Router : internet-box 2 Commercial Profile : 40000 down / 8000 up Kbps Technical capacity : 40871 down / 10939 up Kbps Copper line VDSL2 line length : 1132m Line Attenuationn TX : 35.9 dB Line  […]

Lire la suite

mardi, 20 juin 2017

Speaking about A.I.

logo-api-standard-PNG.png

logo-api-standard-PNG.png Jeudi dernier, j'ai honoré l'amicale invitation de l'Association API-NE (Association des Professionnels de l'Informatique, Neuchâtel) et durant une grosse partie de la soirée, j'ai évoqué le thème de l'intelligence artificielle.

Lire la suite

lundi, 8 mai 2017

Let's test OpenDNS

opendns.png

opendns.png

OpenDNS - can this really work?

This morning, I was at CISCO office for a security training and I was told about OpenDNS (now acquired by CISCO). This is public DNS servers that allow you to filter bad sources, based on their names.

This sounded a bit strange for me. Why trying to protect people by using DNS? Is that really efficient? I ask this question, because DNS is at level7 (application level in OSI model).

I would prefer an IP reputation based system, instead playing with names (as an IP could be registered as multiple names!). But anyway, that's finally one more protection and I decided to give it a try.

Lire la suite

samedi, 15 avril 2017

I moved to LetsEncrypt

certbot.JPG

In December 2016, I wrote a post on this blog about StartCom SSL free certificates. StartCom (and WoSign) aren't trusted anymore. If Internet Explorer and Edge are trusting StartSSL root certificates, this is not the case with Google Chrome. I had to move to another product. Letsencrypt is the  […]

Lire la suite

mardi, 10 janvier 2017

Make sure your Python code is great

logo_1_.png

logo_1_.png

Lire la suite

dimanche, 1 janvier 2017

Cavelink - how to export your data

Using some free time during the holidays, I created a component to extract Cavelink data, by parsing the webpage. It's written in Python and available on GitHub. A cavelink station can be connected with a couple a sensors, to get information from the cave (i.e. temperature, water level). The upper  […]

Lire la suite

jeudi, 8 décembre 2016

About StartCom SSL free certificates

This website has its trafic encrypted with a StartCom Free SSL Certificate. As I recently renewed a certificate, I got this information: Notice: 1. Mozilla and Google decided to distrust all StartCom root certificates as of 21st of October, this situation will have an impact in the upcoming release  […]

Lire la suite

samedi, 19 novembre 2016

Application Testing

Testing.jpg

mardi, 8 novembre 2016

Great Regex website

RegEx_website.JPG

There are many website related to RegEx (= regular expressions). But this one helped me a lot because the test feature is not limited to Javascript capabilities (i.e. to test positive & negative lookaround expressions). If you need some great help in validating things, just go to regex101.com !

mercredi, 2 novembre 2016

Learning Linux

Linux_Learning_curve.jpg

Linux and OpenSource software are driving the cloud technologies. A few examples can be found in this post, where I'm listing the products and technologies considered in the last training I attended. So, I'm learning Linux, in order to better compare, understand the differences between  […]

Lire la suite

mardi, 5 juillet 2016

Achievement Unlocked : Cloud Infrastructure !

IntroCloudInfra.PNG

Les infrastructures orientées Cloud sont certainement un thème passionnant et très complexe. Par intérêt personnel, pour l'envie d'en savoir davantage et pour ne pas rester en arrière, j'ai suivi une formation d'introduction, qui traitait des sujets suivants : Infrastructure as a Service Platform  […]

Lire la suite

dimanche, 28 février 2016

Datacenter et cloud en Suisse

Reportage intéressant sur le thème du Cloud, produit par la RTS. On y voit quelques images du Datacenter de la société DELTALIS... qui héberge (une partie de) ce blog. Lien : Le reportage RTSun - Secret Bunker Deltalis et Datacenter DK2  […]

Lire la suite

mardi, 16 février 2016

LetsEncrypt : la sécurité pour tous !

LetsEncrypt Logo

LetsEncrypt LogoToujours grâce aux excellents collègues d'exoscale, j'ai récemment appris l'existence de LetsEncrypt, une nouvelle CA (=autorité de certification), gratuite et automatisée !

Lire la suite

jeudi, 21 janvier 2016

Monowall is now frozen

monowall

monowall

Le projet monowall est désormais terminé. Je viens de prendre connaissance de l'annonce.

J'ai beaucoup utilisé Monowall, évidemment comme firewall mais également pour passer ma certification IPv6 et aussi comme émulateur WAN, à des fins de tests.

Ce firewall demandait un configuration hardware minimaliste (j'ai utilisé pcengines.ch) et m'a offert la possibilité de :

Lire la suite

mardi, 22 décembre 2015

Moving to TLS and exoscale

Logo exoscale

It was certainly the time to secure this blog and turning to TLS. This is now effective.

But it's also the time to give some information about "what's that site running ?".

Lire la suite

jeudi, 19 novembre 2015

Programmation pour les enfants

Si "savoir correctement utiliser un ordinateur" est devenu absolument nécessaire pour nos enfants, cela risque toutefois de ne plus être suffisant dans les années à venir. En effet, l'apprentissage de la programmation va probablement devenir indispensable, pour aller plus loin, concevoir leurs propres outils et interagir avec les services déjà disponibles.

Lire la suite

mardi, 17 novembre 2015

The Phoenix Project

Phoenix Project Book

Phoenix Project BookDurant le mois de septembre, j'ai lu ce livre qui m'a été recommandé par l'un des fondateurs de Doodle, le site bien connu de planification en ligne.

Paul E. Sevinç, Co-founder & former CTO, présentait alors l'impact de la méthode DevOps sur les réalisations informatiques. Durant sa présentation, il invitait alors à la lecture de ce livre.

Lire la suite

lundi, 24 août 2015

JSON online parser

I'm currently working on a project related to web development technologies (IoT, REST API, Python and some open source packages). You will learn more on that in a few months, I hope. As I'm fighting with the list comprehension techniques, I was looking for a good JSON parser to better display the  […]

Lire la suite

mardi, 14 juillet 2015

Turning a Raspberry Pi as a UniFi Controller

This blog post provides a step-by-step guide that works worry free : http://erikvanpaassen.tweakblogs.net/blog/12480/turning-a-raspberry-pi-into-a-unifi-controller-appliance-%28unifi-4-raspbian-jessie-oracle-java-8%29 Thanks to the author ! As the versions are regularly upgraded, I would suggest you  […]

Lire la suite

vendredi, 13 mars 2015

Office 365 - notes & links

I'm currently involved in a migration of an Exchange Server 2003 to Office 365 system. That's quite a big jump (!) as these two systems are separated by more than 10 years of great technical innovations.

We selected the way of a staged migration to mitigate the risks and better manage the end user devices. As you probably know, a single Office 365 licence can be installed on up to 5 devices and we want that our customer can really get value of this benefit.

This project is really interesting and really focussed on customer'strategy for the upcoming years.

The aim of this post is to provide a list of links we found useful during the project.

Lire la suite

- page 2 de 4 -