Using Linux with OpenLDAP for User, DHCP and DNS

Reading Time: 27 minutes I’m using Microsoft Active Directory in my Lab for most of the tasks, like user authentication, DNS services, and DHCP. The windows VM is getting bigger and bigger so I decided to switch to Linux. The goal is, to have my user directory, my DNS zones and DHCP subnets managed in OpenLDAP. This post shows the … Read more Using Linux with OpenLDAP for User, DHCP and DNS

HowTo: Setup an OpenVPN Server

Reading Time: 8 minutes This time, I would like to describe how I setup my OpenVPN server at home. I use this server to tunnel my traffic home, when using an open Wifi network at hotels or airports, to make sure, my traffic is encrypted. I also use the tunnel. to get access to my mail server when being … Read more HowTo: Setup an OpenVPN Server

HowTo: Backup My Server

Reading Time: 6 minutes This time I would like to explain how I backup my server with the help of some build in tools and a script written by myself. As I’m running my blogs and my mail server, which is Scalix, on a Linux server I need to make sure, that no data is lost during an outage … Read more HowTo: Backup My Server

HowTo: Proxmox Live Backup

Reading Time: 3 minutes In this post, I will show, how to configure and schedule Proxmox live backup to get a full backup of your VM without downtime. I use this for my server once a week and save the created backup to an external backup device. Configure Proxmox Live Backup The Proxmox live backup uses the snapshot technology of … Read more HowTo: Proxmox Live Backup

HowTo: Postfix with SPF

Reading Time: 4 minutes In this post, I would like to explain the usage of SPF (Sender Policy Framework), which could be used to prevent spam. SPF will use the DNS system to tell the receiving mail server, whether the sending server is allowed to send mails for this domain. As this is the basic concept, I will explain … Read more HowTo: Postfix with SPF

HowTo: Postfix with DKIM

Reading Time: 4 minutes In this post, I would like to show, how to use DKIM together with postfix to enhance the chance, that mails send by your mail server are not marked as spam at the receiver. In my last post, I showed how to set up postfix in front of scalix to filter incoming mails. As also … Read more HowTo: Postfix with DKIM

HowTo: Postfix and Dovecot in front of Scalix

Reading Time: 4 minutes In this post I would like to show, how to set up Postfix and Dovecot in front of Scalix on a Debian system, for security and mail filter reasons. I assume, that you have a running Scalix installation and full management access. If you need help to install Scalix on Debian, you can use my last … Read more HowTo: Postfix and Dovecot in front of Scalix

HowTo: Install Scalix on Debian

Reading Time: 3 minutes In this post I would like to show, how to install Scalix on Debian. The system is running the latest version of Debian in a minimal installation. In my last post, about this topic I installed Postfix and Scalix on the same host. This time, I will install Scalix on a host and Postfix for … Read more HowTo: Install Scalix on Debian

HowTo: Proxmox Networking

Reading Time: 3 minutes This time, I would like to show how Proxmox networking configuration can be configured. In my last post, I showed, how to install Proxmox and get ready to create VM’s. I will show a typical configuration, which I always use. The official documentation can be found here: Proxmox Network Model I will show, how to configure … Read more HowTo: Proxmox Networking

HowTo: Install Proxmox on Debian Wheezy

Reading Time: 3 minutes In this post, I would like to show how to install Proxmox on debian Wheezy. Proxmox is a web-based GUI for KVM. I use this in my LAB for all the software related testing. It is free, but you can also get commercial support. It is one of those great open source tools. Check Requirements … Read more HowTo: Install Proxmox on Debian Wheezy

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