Nagios: the standard server for monitoring IT infrastructure

IT departments are not to be envied: all devices, servers, databases, etc., must not only be integrated into the network, but also work at any time. In order to prevent any problems that might arise in advance, Nagios is the monitoring tool you need in your standard IT repertoire. What makes the open source solution so special and what are the alternatives?

MAMP: the local development environment for Mac OS X

If you’re developing a website, it’s important to regularly ensure that all the elements function as intended. Although there are no specific tools required for creating a basic info page with static content, it’s not possible to preview a project containing dynamic elements without some additional tools. The simplest solution is to use an all-in-one development environment like MAMP.

XAMPP tutorial: installation and first steps

The software packet XAMPP is a collection of popular applications like the web server Apache, a leading database management system (either MySQL or MariaDB), the scripting languages PHP and Perl, and more – all together in a compact test server. Our XAMPP tutorial will take you through the installation and configuration process, with the aid of clear instructions and screenshots, to help you set...

Cloud storage providers: the best Dropbox alternatives

Dropbox is one of the most famous and most successful cloud storage services available. Its success is largely due to its many functions and ease of use. But when it comes to data protection and maximum free online storage space, this popular app isn’t the pick of the bunch. There are other file hosting services that offer different approaches. Here’s our collection of some of the top alternatives...

Introduction to netstat

Various computer networks are connected with one another via the internet. In order to build up such connections, both the sending as well as the receiving systems have to provide transfer interfaces, or ports. The command line program netstat allows you to find out which ports are opened by your own system and which active connections exist — all of this helps reduce the risk of undesired access...

DNSSEC: internet standards for authenticated name resolution

Without the Domain Name System, users of the World Wide Web would have serious problems when trying to load websites and other online presences. It’s only thanks to this system that internet addresses appear in their trusted text format: they’re actually nothing more than combinations of numbers. The communication between browser and name server responsible for this isn’t actually as secure as you...

What’s the OSI model?

Those working with network technology are bound to encounter the ISO-OSI model sooner or later. This system subdivides communication between computer systems into seven different layers. Each of these layers is assigned a certain task. With the help of this layer model, subareas of abstract processes are able to be descriptively explained.

Server operating systems: history and today’s situation

Operating systems have gone through some major changes over the years. While their beginnings are rooted in more humble, purely text-based user interfaces, today’s options have evolved into complex software packages with graphical interfaces, comprising an elegant go-between for hardware and software applications. Users, who have long since been equipped with a keyboard and mouse, are able to...

VPN — secure data transfer through public networks

VPN implementations offer an affordable alternative for locally connecting networks, as well as making network resources available for external devices. In contrast to corporate networks, no private communication network is required. Instead, like the internet, VPNs rely on networks, and protect sensitive data through a process known as tunneling.