mpkossen

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Aug 31, 2013

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Comments (32)

There are various ways to set up a Virtual Private Network (VPN). With the various protocols available to use for VPN and all the software out there, it's often a spider's web when you just want to se...

mpkossen

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Aug 24, 2013

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Comments (95)

In light of recent events, there's been a lot of chatter about leaving free e-mail services in favor of self-hosted e-mail. With self-hosted e-mail you have the option to host your e-mail wherever you...

mpkossen

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Aug 06, 2013

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Comments (25)

This tutorial is another part in a series of a security-related tutorials. This time, I'm going to talk about IPtables. IPtables is a software firewall that can filter out certain types of traffic. Mo...

mpkossen

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Jul 27, 2013

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Comments (11)

There are many ways to remotely monitor your servers, but nagios is one of the most configurable and flexible ones. Once you have set up nagios, your localhost is being checked. But when there are rea...

mpkossen

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Jul 20, 2013

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Comments (20)

Nagios is one of the most easy, expandable and trustworthy ways to monitor the status of your server(s). It is highly configurable and even lets you write your own plugins in whatever language you wan...

mpkossen

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Jul 13, 2013

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Comments (4)

A couple of weeks ago I started with the first tutorial in a series of security-related ones. This is the second tutorial in this series. Last time I spoke about SSH and sudo. As Raymii pointed out in...

mpkossen

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Jul 06, 2013

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Comments (10)

A couple of weeks ago, I wrote a tutorial on how to use duplicity to make encrypted, incremental backups over various available protocols. The process was a manual one, though, and would always requir...

mpkossen

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Jun 29, 2013

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Comments (45)

One of the most important aspects of running a server is a good security policy. It is also one of the things that comes last, usually. But if you don't pay attention to it up front, it's going to cos...

mpkossen

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Jun 22, 2013

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Comments (3)

Last week I wrote a tutorial about routing IPv6 from a HE tunnel to VPS on Ubuntu. As promised, this week the CentOS version! A couple of weeks ago I wrote a tutorial where I explained how to set up a...

mpkossen

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Jun 16, 2013

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Comments (2)

A couple of weeks ago I wrote a tutorial where I explained how to set up a Hurricane Electric IPv6 tunnel on your KVM VPS. While this is a nice solution, it still requires the customer to fix somethin...

mpkossen

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Jun 08, 2013

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Comments (9)

In my previous article about ansible, I gave a very basic introduction to it. After reading it, you were able to create your own playbooks and apply them to a single (group of) server(s). However, ans...

mpkossen

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Jun 01, 2013

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Comments (27)

IPv6 is a topic that has received a lot of discussion over the last couple of years. Although originally from 1996, IPv6 became more important and more implemented over the last few years because of I...

mpkossen

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May 25, 2013

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Comments (14)

Backups are about the most important thing about managing a server. If anything happens to your server, like data loss, a customer making a mistake (and accidentally removing data) or a full-blown ser...

mpkossen

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May 18, 2013

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Comments (29)

A common problem with managing multiple servers is keeping their configurations identical (or similar, depending on the purpose of the servers). When you set up a server (say server1), you tweak the c...

mpkossen

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May 11, 2013

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Comments (20)

There are many ways to remotely monitor your servers, but nagios is one of the most configurable and flexible ones. Once you have set up nagios, your localhost is being checked. But when there are rea...

mpkossen

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Apr 20, 2013

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Comments (26)

Nagios is one of the most easy, expandable and trustworthy ways to monitor the status of your server(s). It is highly configurable and even lets you write your own plugins in whatever language you wan...