henning mueller

Hey, I'm henning mueller, a practical computer scientist specialized on agile web development and Linux systems administration with a strong focus on IT security. I currently live in Bremen. For my diploma thesis I brought Rails to the Internet of Things.


I'm happy to receive letters at mail at (the honorable and utterly beautiful) nning.io. Another mail address and my XMPP id is henning at (the honorable and utterly beautiful) orgizm.net. Kudos for encrypted communication; my OpenPGP key ID is 0xae5fc712.

Open Source Code



David is a CoAP server with Rack interface to bring the illustrious family of Rack compatible web frameworks into the Internet of Things. It is based on the Ruby coap gem, which is a pure Ruby implementation of CoAP.



An open source administration user interface for database backed mail servers (based on postfix and dovecot, for example).

Arch Linux Packages

Hardened Arch Linux kernel packages (grsecurity)

I maintain Arch Linux packages for the grsecurity patchset:




A web-based repository for distributed ontologies heavily inspired by GitHub, I helped bootstrapping from March, 2012 until May, 2014.

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