Collecting NetFlow v9 on OpenWRT

Trying to get ntop to work. Fails because ntop is bundled with nprobe which is not available for free anymore. Alternatives are hard to find. Going deeper finally brings me to softflowd and makes me spend the day implementing a NetFlow v9 parser in Python


Debugging OpenWRT wifi on TP-Link WDR3600

My OpenWRT wireless 5Ghz network stopped working from one moment to the other, so there was nothing left but debugging.. Using TP-Link WDR3600 and the CLI.


how2gpg

One year passed since I last signed a key! And since I ran in some trouble because I forgot how to use the CLI of gpg2, this post serves as a brain dump for future usage: configuration file, expiration dates and signing options.


Watchin' you watch

Are you using IPTV? Do you share a network with other people? Then this might interest you. In this article I am going to demonstrate, how someone with a device in your network can sniff and analyse your IPTV usage.


Creating an encrypted RAID5 with LVM in Debian 8

This week I replaced my broken RAID1 with a new three-disk LUKS-encrypted RAID5. This article is a step-by-step guide you can use to reproduce and compare your own setup.