Are you looking for experts in documentation, knowledge management, research, digitalization, digital souvereignty, digital sustainability, internet politics and open source technology?

Welcome to Feilner IT! Since January 2000, we have been helping human beings in today’s IT landscapes. Our customers come from all over the world, and there is a multitude of publifications from and about our work and projects.

How do we work? Our tools include writing, publishing, training, mediation, moderation, consulting, mentoring and coaching – both individually, in groups or as part of ambitious long-term strategies.

For techies: Feilner IT is providing help and experts for the OSI Layers 8, 9 and 10.
Where the OSI standard actually defines only seven layers (from from hardware – Layer 1 – to Applications and User interfaces – Layer 7), Layer 8 (what is happening “in front of the screen”) is where we come in. We are actively supporting users , organisations (Layer 9) and government institutions (Layer 10) with strategic and hands-on writing, consulting, and research.

Contact us, check out our offers and have a look at our recent highlights below.

Recent Highlights

Not quite 2020, but 2021 and in Regensburg, and SOLD OUT! This weekend, October 02 and 03, the conference part of Minidebconf 2021 Regensburg, the leading developer conference of the great Debian community will take place. There’s so much more about it, even on Thursday and Friday but Feilner It helped organize it and Markus will give several presentations during the weekend.

Tuesday, September 26), at Owncloud conference Markus Feilner had the honor of hosting a panel on Open Source and enterprise, with Cornelius Schumacher of KDE/DB Systel and the CERN Head of Storage, Alberto Pace. Video will be published.

Once again Markus Feilner was permitted to give his classic OpenVPN training at Linux Hotel, Essen. Also this time, “for cops and public servants”, great participants and a wonderful venue made it a great event. Thanks to all that make this possible!

Markus Feilner has published the first ever written article on a very promising open-source groupware solution: Grommunio, formerly Grammm, is heading to be or become a “drop-in replacement” for market leader Microsoft Exchange. But of course in Open Source and with tons of features, including Mattermost (Chat), Jitsi (Video) and Owncloud (Files).

For Linux-Magazin 10/21, Markus Feilner has written an in-depth introduction to Metasploit, the number one Hacking tool around. On nine pages (!) he was allowed to show how to take over Windows machines through executables hidden in PDFs or worse… Here’s the full article…

Web Key Directory is an amazing technology that promises to make encryption with PGP, GPG and E-Mail much easier. No more searching for the right key, no more wrong keys being user. Here’s an article by Markus Feilner for german magazine IX 10/21 about WKD.

In his final article for Telepolis on the #Lucaapp scandal (a german startup’s endeavour to create a contact tracing app that triggered hundreds of flaws, failures and security holes), Markus Feilner wrote about strange things happening during the tender (Update: Article has been censored by publisher, full version on, prior articles here: [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11]).

Owncloud now supports Windows Virtual File systems, and, Redhat’s opensource blog/journalism portal published another article from our friend Martin Loschwitz on this topic. Markus Feilner is proud to have helped with that.

Another American magazine, ADMIN chose to publish one of the series of articles Martin Loschwitz and Markus Feilner wrote about Owncloud OCIS, the new, Go-based version of the former PHP software for enterprise file sharing, collaboration and sync.

As of July, 1st, Feilner IT is very proud to be allowed to help the Bavarian city of Treuchtlingen in their quest for digitalisation. For 20 years, Treuchtlingen has been a lighthouse of Open Source and usability, showing that security, digital sovereignty and service quality go together in public administrations.

The state-run Norwegian consumer protection and information instituion Forbrukerrådet has startet an open letter against advertising business models aimed at spying on customers and visitors. Their “call to action against surveillance-based advertisting” goes out to many EU institutions, asking to ban such models. Feilner IT has signed this letter.

Markus Feilner’s old home, Linux-Magazine Germany (where he served many years as deputy editor-in-chief), printed an article almost 8 pages long about Free and Open Source Software in the complex German public administration’s IT landscape. Read it now, in issue 8/21, pages 36 to 44 (publicly available after 7-8-21).

The German IT think tank “Stiftung Neue Verantwortung” (Foundation New Responsability) has published an open letter signed by prominent experts, scientists and NGOs that strongly critize the German Ministry of Interior Affairs’ recent strategy paper for cybersecurity. Feilner IT of course was one of the first signers.

Once more, Markus Feilner wrote an article for Heise Telepolis. This one (also in German) describes the ALT-Right background of Clearview AI, the company that illegally scraped photos from websites and social networks and is using them to create biometric profiles – despite EU laws and GDPR.

DeeAnn Little of Feilner IT has published her first article for a German Tech journal. On almost 8 pages in Linux-Magazin 06/21, under the title “Heavy Metal” she describes how to extend the life of an old Chromebook with the help of some tweezers, tin foil and Gallium OS. Markus Feilner helped with translating.

Another article in Heise Telepolis by Markus Feilner. This one discusses recent IT laws that had been pushed through the German parliament in the last weeks. The German government coalition is coming to an end soon, but there was still some homework from the EU left undone. Thus, at the end of its term, the coalition had to rush through some laws. Sadly, with an expectable result.

Digitally Sovereign Websites: Feilner IT has helped the renowned Open Source Business Alliance to make its website more than just GDPR-compliant, but also digitally sovereign. Together we could take the necessary tests and steps to remove the cookie banner.

The renowned and awarded blog Regensburg Digital has interviewed Markus Feilner as expert in the matter of the Luca.App. Money Quote: “Die PR-Strategie von neXenio und Culture4life ähnelt der von Donald Trump: Schneller fragwürdige Aussagen veröffentlichen als der (politische) Gegner diese entkräften kann. In der Zwischenzeit macht man viel Geld.” Update: RD has published a second article about Luca.

Markus Feilner helped Scientists for Future (S4F) writing Climate-friendly Energy Supply for Germany – 16 Points of Orientation (in German). S4F is an independent collective of scientists, researchers and academics from a multitude of disciplines, providing facts on the issues of global change, climate and sustainability for society and politics.

Continuing the story with the Luca App for contact tracing in Germany for Telepolis, Markus Feilner interviews the CEO of the Luca App, who weighs in on on the debate about the use of his company, discussions with experts and the relationship to the Corona warning app. (German) Part 1 | Part 2 | Part 3

The introduction of the Luca App for contact tracing in Germany has seen harsh criticism. Failures were made in licensing, security, integration with the human factor within an already-stressed contact tracing program, public relations controversies and much more. Markus Feilner takes a deep look at Telepolis: (German) Part 1 | Part 2 | Part 3

As of March 1, 2021, Markus Feilner has joined the team of and Heinlein Support to help with documentation, technical writing and internet politics. Here’s his first blogpost about how German security politicians without any clue or care try to sabotage basic human rights and damage our economy.

Even after Markus Feilner left Heise in March 2021, he still keeps on writing regularly for Germany’s biggest IT publishing house. As an example, here’s the link to his political investigations, insights and explanations: All Telepolis articles by Markus Feilner (German)

In 2020, Feilner IT was consulting GAF, “one of the leading companies in the geo-spatial service market.” . Tasks include designing process and information structures and developing enterprise-grade documentation concepts. GAF is a leader in satellite image processing and “a one-stop shop for geo-information”.

Markus Feilner helped create, edit and wrote some of the almost 20 pages in iX 2/21 that orbit around knowledge management in the 21st century. You may have noticed the shitstorm that Atlassian (Confluence) received when they announced their future Cloud-Only strategy. This magazine (in German only) has all you need to know. Alternatives, Strategies and Backgrounds.

Open Source rocks, and Markus Feilner has been using and supporting KDE, the leading OSS Desktop environment since its first version 1.0.0. Early in January, he was happy to be guest of the KDE-PIM developer meeting in virtual Osnabrück. Great work, folks!

Markus Feilner was allowed to help wording a paper from Scientists for Future. The document (PDF, German) has been published here and it demands the installation of so-called representative climate citizens assemblies. It carries the title “Scientists for Future empfiehlt eine repräsentative Klima-Bürger:innenversammlung im Jahr 2021 (Version 1.0)”, version 1 was published on Dec. 11. 2020.

Feilner IT is proud to be a contributor in organizing Minidebconf Regensburg 2020, even if it didn’t happen in 2020 :-). Even though we’d been working on it since early last year, the event will have to be postponed to 2021. We will announce the exact dates soon. Feilner IT is happy to help and discuss, if you like that too, get engaged on #debconf-germany on IRC!

The German association of internet companies Eco has invited Markus Feilner to be a part of the jury for this year’s award. And Markus will do the laudatio for the winner in the realm of security. Join the cermony on Thursday, Nov. 26, 2020 – it’s Eco’s 25th anniversary!

The German state of Baden-Württemberg, precisely its Department of the Interior is looking for Open Source people and companies to develop a CO2 compensation app. And they are doing it the right way, in a comprehensive and well-considerd tender. Feilner IT is proud to have helped a very tiny bit in the creation of the tender. (in German, November 2020)

For Heise iX 12/20 (German), Markus Feilner wrote the editorial (Von Dementis und Demenz) and two articles for the title track on digital sovereignty: “Jetzt oder nie” (Digitale Selbstbestimmung) and on GAIA-X (“Gaia Europeana“, German, November 2020)

For days after the election 2020, rural Nevada has been letting us wait for a few hundred votes. On Telepolis, a popular (German) blog, Markus Feilner explains what Hanlon’s razor is about and why it may or may not be applicable to the “Silver state” (German, November 2020).

“Open Culture meets VR” is a project and award of the MFG of Baden-Württemberg. Markus Feilner helped in the jury, with laudatio and keynote (German, November 2020)

Markus Feilner has contributed to a study published by OSB Alliance Verein für Digitale Souveränität on “Digital Sovereignty in public administrations” (German, Autumn 2020)

Feilner IT helped publish an analysis and market review of open-source alternatives to Atlassian’s Confluence Wiki-style software. In this article on author Martin Loschwitz compares Blue Spice, Xwiki and Twiki. (English, August 2020)

Feilner IT helped create a study for the city of Freiburg on options for migrating their groupware while keeping all other software solutions supported. (German, June 2020)

Markus Feilner was invited to speak at the University of Hof. On March 5, 2020, the IT Forum Hof celebrated 10 years of bringing together IT and industry, as “IT as business enabler”. And not only that, the institute of information systems also turned 10.

Find more references and older projects on our history page.