Here you find various scripts and configs that I have written over the years. All of the stuff is either freeware or under GPL license - please check the respective article! Please don't ask me for support with those stuff. It's there but that's it. If you can't get it work, it's bad luck. Have fun playing!

Tips, tricks and scripts around the Asterisk open source PBX.

Tips, tricks and configs around Cisco routers, switches, firewalls and other products.

Articles, tips, tricks, scripts and howtos around Linux.

All kinds of scripts for everything and nothing.

I am an experienced IT-security engineer, consultant and project manager with more than 10 years under my belt. In this category I publish my own whitepapers and findings as well as warnings and interesting information from other corners of the web.