Skyscrapers blog

Passionate Cloud Engineer(s)

Published on February 20, 2017 by Frederik Denkens

You are passionate about open source technology, public cloud, devops and modern application architectures and workflows? Then you might be the person we’re looking for! We are searching for a cloud engineer to join our distributed team. You will be building reliable cloud platforms, supportand advise our customers developers on the best way forward. You’ll […]

AWS re:Invent

Published on December 9, 2016 by Mattias Gees

Last week Frederik and I went to AWS re:Invent in Las Vegas, which is the largest annual conference of Amazon AWS. The conference is 5 days long with main highlight the keynotes of Andy Jassy (CEO of Amazon AWS) and Werner Vogels (CTO of During these two keynotes a lot of new services and […]


Published on May 11, 2016 by Simon Rondelez

On the 3th of May the internet was introduced to a new vulnerability CVE-2016–3714 better known as ImageTragick that has a big impact on websites and servers. ImageMagick is a package that developers can call in their code to process files. It is implemented as a system call that accepts a command string that is […]

Team changes and our team gathering in Barcelona

Published on May 9, 2016 by Frederik Denkens

Team changes We are kicking May off with some changes to our team. First, Geert and Juan Carlos have left our team. We thank them for their time at Skyscrapers and wish them all the best in their future ventures! Maybe we will cross paths again. On the bright side, today Luca joined our team. […]

A (late) happy new year and a look at 2016

Published on January 26, 2016 by Simon Rondelez

Almost 1 month in, but we’d still like to wish you a wonderful New Year. Last year was quite a busy year for Skyscrapers. As we’re becoming a more transparent company we’d like to share some of that with you and give you a sneak peek of what 2016 will bring. New clients and projects […]

Choosing the right worker queue service

Published on November 18, 2015 by Simon Rondelez

  The world changes quickly. Not only product software but also middleware applications are provided in the cloud or as a service. So we as operations people need to adapt. Customers want to know what the difference is between the offered products. Trying to  understand the pricing difference and make the right decision. When giving […]

Skyscrapers helps iVox launch National campaigns on AWS

Published on September 25, 2015 by Frederik Denkens

iVox had developed a new survey-platform for a national campaign. They were uncertain if their application would be able to handle what was coming: Prime-time national exposure Expectation of up to 1.500.000 million visitors, up to 25K concurrent visitors High-exposure campaign, with major media-brands as stakeholder Once our experts reviewed the application and architecture, we quickly […]

Knowledge partnership between Sizing Servers and Skyscrapers

Published on September 17, 2015 by Frederik Denkens

We are happy to announce that we have started a cooperation with Sizing Servers Research Labs. A unique co-creation of knowledge between us as public cloud expert and a truly independent research lab. Sizing Servers helps us with stress testing expertise and skills. In return we are giving back our deep knowledge about public cloud, […]

AWS cli: quering multiple accounts

Published on August 24, 2015 by Simon Rondelez

At skyscrapers we manage the aws infrastructure for multiple clients. We automated accessing the different aws consoles with a pretty cool script. It gives our federated user automatically a login url and opens a browser accessing this url. It uses 2FA and the access is only temporary to add more security. Maybe this is a writeup on […]

Terraform remote state

Published on August 10, 2015 by Mattias Gees

Introduction For an Amazon AWS project, we are setting up a complete Amazon AWS infrastructure with Terraform. The first step was to setup a VPC, ELBs, RDS and basic EC2 instances. I started looking into the remote state capabilities of Terraform together with S3 storage, because it lets us work together without the need to […]

Skyscrapers finds new home for shared customers

Published on July 9, 2015 by Frederik Denkens

Combell is taking over our shared-hosting-customers and related services like domain registration and email.  This is a major step for us, paving the road for further development of our strategy around Public Cloud services under the name of Skyscrapers. Shared hosting has been a cornerstone in the evolution of our company, with the ‘oldest’ contract […]

Helping neoScores get ready to conquer the world

Published on June 9, 2015 by Frederik Denkens

For some time now neoScores has been making waves in the Belgian startup scene. And soon they will start conquering the world. Their goal is to become the iTunes of sheet music. As ambitious startup making the right choices from the start is critical. Skyscrapers has been involved since day one. We started with providing […]

Say hello to Sam, the newest Skyscraper

Published on May 7, 2015 by Frederik Denkens

Sam was one of the 50 people who responded to our last job post. There was a mutual feeling that we’d be a good fit for each other. After 1 month of working together, it’s clear our hunch was right. It’s exciting to see how fast he is growing into his new role and becoming a true […]

Last day

Published on April 3, 2015 by Filip Van Tittelboom

Today is my last day as a Skyscraper! I will be joining a startup that is in the process of developing an Internet of Things (IoT) platform. I’d like to thank each and every one of my colleagues and customers (past and present) for helping to create such a satisfying and pleasant work environment over […]

AWS and Linode XEN updates

Published on March 2, 2015 by Frederik Denkens

A couple of days ago, the world learned about a new security issue in the virtualisation software XEN. This component powers many clouds. The exact details of the issue are under embargo until March 10, after which they will be made public.  We manage hosting-platforms for our customers on various providers, including Amazon Web Services […]

GLIBC ‘Ghost’ vulnerability

Published on January 28, 2015 by Filip Van Tittelboom

Yesterday evening, there was a lot of talk on the ol’ interwebz about the latest ‘Internet Killer’ bug dubbed ‘Ghost’. It’s a GLIBC vulnerability (CVE-2015-0235) affecting almost every Linux distribution. A remote attacker able to call the affected functions could exploit the flaw to execute arbitrary code with the permissions of the user running the […]

End-Of-Life Ubuntu 10.04 LTS

Published on January 6, 2015 by Filip Van Tittelboom

This is just a friendly reminder that support for the linux distribution Ubuntu 10.04 LTS ‘Lucid Lynx’ will stop as of April this year. Those instances won’t receive Canonicals 5 year ‘Long-term support’ (LTS) anymore. This means no more security patches and updates to the ‘Ubuntu stack’. It’s important to remember that future vulnerabilities would […]

Working at Skyscrapers – a small Q&A

Published on November 13, 2014 by Filip Van Tittelboom

We get a lot of similar questions from applicants, so I decided to write a small Q&A from the point of view of an employee. Not that we call ourselves employees. We call ourselves team-members. Q: Can you describe a typical day? A: You’ll work closely with the developers of our partners; designing, deploying, managing, […]

SHA-2 HTTPS certificates

Published on October 30, 2014 by Filip Van Tittelboom

Last month Google, Firefox and Microsoft announced they will be retiring support of SHA-1, the cryptographic hash algorithm used in HTTPS SSL certificates. They calculated that it became too affordable to decrypt SHA-1 certificates and are upping the security of their applications. Future browser versions (next year) will show an error or warning message if […]

We’re hiring again: looking for a cloud engineer!

Published on October 23, 2014 by Frederik Denkens

UPDATE: This post is no longer relevant. Check out our new Jobs page .   It’s been a busy year. Last summer Mattias joined our team, but we’re again on the lookout for another Skyscraper. If you like what you read below, don’t hesitate to get in touch (see instructions below). Skyscrapers help design, build and manage scalable, […]

Meet us at the DevOpsDays Belgium 27-28 October

Published on October 15, 2014 by Frederik Denkens

DevOps is a big thing in the cloud world and we fully embrace it. Not only internally, but also as the preferred way we partner with our customers. We are lucky to live on the same soil as some of the ‘founding fathers’ of DevOps, like Patrick Debois and Kris Buytaert. Now, 5 years after […]

We had a busy week: Shellshock and XSA-108

Published on October 1, 2014 by Frederik Denkens

One of the things customers expect from us, is that we manage the security risks of their cloud-environments. To show our job is never finished, last week we got treated to 2 big security threats in the cloud. This article gives some detail on the events and how we handled them. Shellshock Last week Wednesday 24/9 […]

Skyscrapers: One Year Later

Published on August 20, 2014 by Frederik Denkens

Today marks the first anniversary of our launch as the Skyscrapers. It’s been a fantastic year with various cool new projects and accomplishments. Amazon Web Services admitted us as Standard Consulting partner, further validating our cloud-expertise. It gave us the opportunity to consult various ISV’s on their Amazon deployments for their SaaS platforms and build […]

A new Skyscraper in the cloud: Mattias Gees

Published on August 4, 2014 by Frederik Denkens

When you call us these days, you might get the voice of Mattias on the other end. He is the latest Skyscraper to join the team! He has a background in systems management, DevOps and cloud-building. As a Junior Cloud Engineer, he’ll be building and supporting the cloud environments we design and build for our […]

We’re hiring: looking for a junior cloud engineer!

Published on May 7, 2014 by Frederik Denkens

The Skyscrapers help design, build and manage scalable, highly-available and flexible hosting platforms in the cloud. Most of our work is done using providers like Amazon Web Services and Linode. We mostly work for startups, interactive agencies and software vendors. Check out our site, team and blog to learn more about us! As demand is growing, we are now looking […]

The cloud just keeps on giving: Linode goodness

Published on April 25, 2014 by Frederik Denkens

The cloud just keeps on giving. It’s a market that is highly competitive, continuously resulting in declining prices and improving value for everybody. And now it’s Linode’s turn again: last week they announced a complete revamp of the Linode plans and their hardware and network. A quick overview: Introduction of highly reliable server-grade SSD storage Network […]

How the Skyscrapers are dealing with Heartbleed

Published on April 11, 2014 by Frederik Denkens

By now you’ve probably heard about the “Heartbleed bug”. It’s a scary name for a scary security problem. The problem lies in one of the main software components that is used to protect many sites on the internet. Many of our customers rely on it for securing their applications. As transparency is one of our […]

Let the cloudwars begin: Amazon Web Services and Google Cloud slash prices

Published on April 1, 2014 by Frederik Denkens

Last week was a great example of how consumers of IaaS and PaaS services can benefit from the increasingly more competitive global cloud market. Dramatic price cuts, ranging from 10% to 85%, for everybody and best of all: almost instantly! The week started off with the Google Cloud Platform Live event in San Francisco where […]

The Remote Working Experiment

Published on January 9, 2014 by Filip Van Tittelboom

A couple of weeks ago I had to undergo some minor surgery. No worries, nothing serious! For three weeks I wasn’t allowed to ride my bike to work anymore. Our main office is a coworking space in the northern part of the city. To get there on time by car is nearly impossible. It was […]

Our availability for the coming days

Published on December 23, 2013 by Frederik Denkens

As we’re nearing the end of this great year, we’d like to share with you our availability for the coming days. Tuesday 24/12 and Tuesday 31/12 we’ll be closing early at 15:00 CET. All service requests that fall under the business-hour support, will not be picked up after that time. The general support number will also […]

AWSUGBE #2: AWS Use cases and S3 best practices/upload performance

Published on November 15, 2013 by Frederik Denkens

Last week we hosted the second AWS User Group Belgium at our offices. Due to the terrible traffic around Antwerp we started out a bit later, but that didn’t make it any bit less interesting. The first presentation was by Alex Sinner, AWS Solutions Architect. He explained the main use cases for choosing AWS and how […]

Skyscrapers Garage Sale

Published on October 30, 2013 by Frederik Denkens

For some years now, we’ve completely evolved our business to become infrastructure independent. Since some time we run for 100% in the cloud (Amazon Web Services, Linode, etc). We’re now selling of the last of what’s left: IBM Blade servers, chassis and SAN stuff Networking gear Assorted 1U pizzabox servers It is older but still […]

AWS Summit Benelux 2013

Published on October 14, 2013 by Frederik Denkens

Amazon is touring the world with a series of Amazon Web Services Summits this year. Such a summit is a one-day event promising to showcase “the latest cloud computing trends and some of the most interesting use cases and workloads running in the AWS Cloud today”. With such a promise, we simply couldn’t miss out […]

No More Iron

Published on September 17, 2013 by Filip Van Tittelboom

So we emptied our last rack in Brussels today. From now on all of our internal and customer infrastructure runs 100% in the cloud.

AWS User Group Belgium kick-off: CloudFormation

Published on September 13, 2013 by Frederik Denkens

At Skyscrapers we build environments for our customers on Amazon Web Services. Although we already have some experience, there is still much to learn. Webinars, blog-posts and tutorials can teach you a lot, but nothing beats sharing of real-life experience between humans. Meet the the AWS User Group Belgium. This week on Tuesday at ICAB […]

Back in the Day

Published on September 2, 2013 by Filip Van Tittelboom

When doing the things I do now, it’s funny to reminisce about my first job as a system administrator. I worked for a small company that managed servers and networks for small businesses. They also did colocation. A typical scenario would be to get a call from a customer: “We’d like to move our web […]

iLibris becomes Skyscrapers

Published on August 20, 2013 by Frederik Denkens

As announced, we’re saying goodbye to our old name and are now becoming the Skyscrapers. Over the years we’ve seen our business evolve, the hosting-world is changing. Cloud computing is becoming the norm. We, as a company, want to remain at the forefront of where the market is heading. That’s why we believe the time […]

Htaccess Files: The Silent (Performance) Killer

Published on April 3, 2013 by Filip Van Tittelboom

Htaccess files are convenient. They let you change settings without restarting Apache. It gives non-root users the ability to configure certain server settings. You don’t have to bother your friendly system administrator for a small tune. Best of all: changes are effective immediately. A lot of mainstream CMS and frameworks come with pre-packaged htaccess files […]


Published on February 21, 2013 by Filip Van Tittelboom

Last week, we moved our IPv6 service from alpha to beta. IPv4 addresses are running out fast, so we can’t stay behind on our IPv6 development. Converting the iLibris nameservers was the most important part. These allow us to run your website on both IPv4 and IPv6. After a testing period, it was time to […]

Server location and geotargetting/SEO

Published on November 20, 2012 by Frederik Denkens

Many people think that server location is still key for reaching a local market through the search engine. The truth is a bit more nuanced. Google and other search engines attempt to make their search results as geographically relevant as possible for the visitor. A person searching from Belgium will mostly get hits from Belgian […]

We’ve moved

Published on June 5, 2012 by Frederik Denkens

Good planning goes a long way, so probably almost nobody noticed that we quietly moved. As of the 1st of June 2012 you’ll find us at the following address (main office): iLibris BVBA Burooz coworking Duboisstraat 50 2060 Antwerpen Why did we move? ASPACE unfortunately closed last week. Because we’re into new kinds of working […]

2012 en de managed cloud

Published on January 20, 2012 by Frederik Denkens

2011 was een bewogen jaar. Naast een aanzienlijke inhaal- en opkuisoefening (stopzetten van Windows hosting, online backups, etc), zijn we er ook in geslaagd om iLibris op een volledig nieuw spoor te zetten. We zijn namelijk geen gewoon hosting bedrijf meer. Wij managen nu de cloud voor u. De basis De hostingwereld is sterk aan […]

Monitoring and beer

Published on December 2, 2011 by Filip Van Tittelboom

Our partners expect their web applications to be available 24/7. So one of the less visible services we provide is ‘monitoring’. If a problem should arise, we want to be notified. If that problem occurs after business hours, the operator on call should be notified. This article will try to explain how we implement these […]

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