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Mass-blocking IP addresses with ipset 18 May 2012 | 08:17 am
I was sponsoring an upload of ipset to Debian the other day. This reminded me of ipset, a very cool program as I am going to show. It makes administering related netfilter (that is: firewall) rules ea...
Apache Traffic Server the better web cache 4 Oct 2011 | 08:11 am
From time to time you find yourself discovering a piece of software you never heard before but you immediately realize you certainly missed something like that up to that point. Apache Traffic Server ...
Setting up an iSCSI target with ZFS support on Debian kFreeBSD 8 Jul 2011 | 09:31 am
Until recently Debian kFreeBSD, the FreeBSD powered Debian branch, had some serious issues when dealing with ZFS. The situation improved dramatically since then and ZFS is quite usable in recent snaps...
How to bootstrap Debian over another running Linux system 18 Apr 2011 | 10:43 am
Sometimes you feel the requirement to replace an installed operating system in-band, which means while the old system is running and providing you access to the hardware. Say you’ve got a “less desire...
Configure MAC based VLAN assignment with FreeRADIUS and JUNOS 20 Mar 2011 | 01:33 pm
Have you ever been annoyed from managing a complex VLAN setup on switches? It is a complex task. Not so much to actually configure a VLAN but to track state among different hardware, allowed and forbi...
Deploy JUNOS on a VirtualBox virtual machine 5 Mar 2011 | 02:16 pm
People interested to learn how to use enterprise hardware routers usually won’t have the possibility to access those devices in an experimental lab environment because its price. Hence, to get pratice...
The Internet in a Nutshell 25 Feb 2011 | 12:39 pm
The Internet, as we know it today is a large system of interconnected autonomous networks. That means a lot of diverse authorities are involved, each playing a certain role. The only common ground is,...
Hands-On experience with Debian GNU/kFreeBSD 16 Feb 2011 | 12:44 pm
Recently Debian 6.0 “Squeeze” has been released. Among a lot of improvements and enhancements, the community introduced a completely new distribution as technology preview namely GNU/kFreeBSD. There y...
zsh – Die bessere Shell 15 Aug 2010 | 05:12 am
In der Linuxwelt gibt es einen großen Grad an Freiheit. Die Freiheit der Wahl. Das ist nicht immer von Vorteil, zum Beispiel, wenn man mal wieder leidlich darüber diskutieren möchte, welcher Textedito...
Ressourcenverwaltung mit Xen 22 Mar 2010 | 10:41 pm
Virtualisierung ist in aller Munde. Wie kaum ein anderes Thema, hat dieser Begriff in den letzten Jahren den Servereinsatz konsolidiert. Für Endkunden gibt es ganze vServer für ein Taschengeld und für...
