all about networking
Reading Time: 4 minutes In several meetings I get the question, how can I sent different DHCP options to different devices. The answer is to use the DHCP Vendor Class Identifier, DHCP option 60. Every device sends this option to the DHCP Server, and each DHCP Server can answer with specific options, depending on the option 60. I will … Read more DHCP Vendor Class Identifier – DHCP Option 60
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
Reading Time: 4 minutes Since ClearPass version 6.6.2, we have support for KVM (Kernal-based Virtual Machine). In this post, I show how to install ClearPass on Proxmox. Proxmox runs KVM based virtual machines but unfortunately do not use the tools from the installation guide of ClearPass. Nevertheless, follow this post to get it running. Running ClearPass on Proxmox is … Read more Install ClearPass on Proxmox
Reading Time: 4 minutes In my last post, I described a simple way, to use the an external captive portal with the Aruba Instant solution. This time, I will change the lab environment to support bridged clients. I will also cover the scenario with the internal dhcp server and the situation with an individual certificate. External Captive Portal in Bridged … Read more Aruba Instant – External Captive Portal Enhancement
Reading Time: 7 minutes This time, I write about the scenario, using Aruba Instant with external captive portal. With external portal, I did not mean ClearPass. It can be a simple web server, with a simple web page, hosing the captive portal. I show, how to send back the information to Instant AP and get the user online. How … Read more Aruba Instant with External Captive Portal
Reading Time: 7 minutes In this post, I would like to describe the steps needed to set up an development environment for an internal application for the HPE VAN SDN controller. My aim is to use this environment to start writing a simple application for the HPE VAN SDN controller later on. I will use Ubuntu as the development … Read more Development Environment for an Internal Application for the HPE VAN SDN Controller
Reading Time: 2 minutes In this post I will cover the question around a minimal Ubuntu installation. For the background, I was trying to find a way to install Ubuntu without all the additional software which comes with the default installation. I’m always a fan of starting with the minimal installation and add software as needed. It turns out, … Read more Install a Minimal Ubuntu
Reading Time: 8 minutes This post will describe one option to implement a VXLAN enabled fabric. I will use VSR router to create the fabric and create the overlay using VXLAN. I already gave a general overview about VXLAN in an earlier post here:VXLAN: What is VXLAN VXLAN Implementation Introduction Before I will start to describe the configuration I … Read more VXLAN: Implementation
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
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