How to find out about the Netz-AK and how to get online in your dorm

In a very friendly and constructive conversation with the new head of the Housing Department, we learned yesterday that the Studierendenwerk currently only refers to the FAQ on its website when it comes to information about the Netz-AK and internet access in the dorms.

That is not much and does not match the agreements we made with the Studierendenwerk a few years ago.

In the future, there will again be an information sheet from us included with the rental contract, explaining where to find information and how to contact us.

Instead of just one of the many papers you get when you move in, you can also find us via posters in the dormitory hallways.

For the winter semester 2024, the Studierendenwerk had offered to design new posters for us and put them up in the dorms. The new design looks much better and more professional than our old green posters, which needed to be replaced.

However, in most of the dorms we visited, the new posters were not there. We also didn’t get confirmation from the Studierendenwerk that they were successfully put up. They assumed that the missing dorms would follow step by step.

So far, replacing the old green posters through the Studierendenwerk has mostly not been successful.

We are therefore ending the action “posters in all dorms for the winter semester by the Studierendenwerk” as unsuccessful in July 2025.

We have now created our own new posters based on the Studierendenwerk’s design and started putting them up ourselves.

Because of the missing information, many residents were not able to make full use of the internet connection available to them in the dorm.

Most people who contact us because of Wi-Fi problems use routers we have been advising against for years in our totorials. Only a small number of residents in dorms that already have gigabit internet use a router that can even make use of more than 10% of that speed.

We see a lot of potential to improve the flow of information in the future, thanks to some changes already made at the Studierendenwerk. That way, you can really enjoy what is probably the best internet connection you will privately use in the next ten years.

Netz-AK e.V. is now officially a non-profit organization

Since July 2025, it’s official: Netz-AK Tübingen is a registered and recognized non-profit association. This means we’ve not only finalized our statutes, but also laid the organizational foundation to continue our work in a stable and reliable way.

Behind the association is a team focused on technology, networking, and digital infrastructure in Tübingen’s student residences – with expertise, commitment, and a clear focus on transparency and participation.

If you’re curious how we’re organized, how to get involved, or what we’re planning, you can find all the details here: Netz-AK Tübingen e.V.

Please note: All official information regarding the association will likely remain in German, as the legal framework for associations is defined in German law – and there is currently little demand for an English version in this context.

Addendum to the outage in Albstadt on 2025-06-04

We had an outage in Albstadt for several days on June 4 this year – in connection with a power failure there. So something happened, a lightning strike or something.

2025-06-04 Outage Albstadt

A member from Albstadt brought the switches to our weekly meeting today and we unscrewed them to see what had happened – when we plugged them in, they no longer started up.

Our analysis: A capacitor in the power supply unit has been smashed due to too much current.

Switch 1:

Switch 2, more detailed, also with the part separated from the rest:

 

Network Maintenance Hohenheim 13.6.25

Tomorrow between 8 AM and 4 PM, there may be brief interruptions to your internet connection.

But don’t worry — if everything goes smoothly, the outages will only last a few seconds. In the worst case, you might need to restart your router once.

Why are we doing this? We’re upgrading your internet connection and increasing the capacity of our uplink for the dormitories.

2025-06-04 Outage Albstadt

At around 03:00, the internet connection of the dorms in Albstadt went down. As the time is pretty even, this could be some kind of planned maintenance work regarding infrastructure outside our control – but nothing was announced to us.

If the problem persists tomorrow, somebody of us has to visit the network room in Albstadt physically.

Update 8:30 AM:There is a major power issue at Poststraße 22/1. Without electricity, our equipment doesn’t work.
Poststraße 22/2 is connected to 22/1, so it is also offline.

Update 7 PM: we are still waiting for power.

Update 2025-06-04 10:30 AM: we are still waiting for power.

Update Friday, 2025-06-06, 8:30 AM:

Unfortunately, there are no new developments. Three circuit breakers are off. When one of them was switched back on, smoke appeared. For safety reasons, the Netz-AK will not touch these breakers or power outlets.

Our network infrastructure has no power and is completely offline. Normally, power supply is not our responsibility – but since nothing has happened so far, we are now checking with the Studierendenwerk to find out if and when an electrician will come for repairs.

If the issue is not fixed today, we will look into other ways to power our devices. At the moment, we cannot say whether that will work.

We, too, are surprised by how long the power outage is lasting and how it affects hot water and the network. We’ll keep you updated.

Update 12:50 PM: Something seems to have been fixed, but some spare parts had to be ordered. Since we only have information from third parties, we are not sharing any details.
We are now looking for a power source to get our switches running again.

Update Saturday, June 7, 11:30 AM:

We got in the car in Tübingen at 8:30 AM and drove to Albstadt because our team member on-site “couldn’t” access the room yesterday.

When we arrived at Poststraße, the tech room was dark. According to our info, there’s no power there. There are no alternative power sources nearby, but we happened to meet an electrician who wanted to fix the lights.

Now we have first-hand information we can share.

On Wednesday, there was an overvoltage, probably from a lightning strike.

The electrician already replaced the fuses on Wednesday and found that our hardware (network switches) was burned out. He informed the caretaker.

So we are not waiting for electricity or a big repair — we just need to install new devices.

We have everything in stock in Tübingen, but we didn’t bring the devices because we thought the only problem was missing power.

We could have replaced everything already on Wednesday, no probem at all.

Someone from our team will go back to Albstadt during Pentecost and install the replacements.

If you’re frustrated, please contact the Studierendenwerk directly…

Update Sunday, June 8, 6:50 PM:

Poststraße 22-2 is already back online, and room by room, the network is coming back.

Big thanks to the person who lent their car to our AK member on site, so the switches could be picked up in Tübingen and brought to Albstadt.

You should all be back online very soon.

Netz-AK Update – June 2025

The Network Working Group (Netz-AK) was founded in 2004 to improve the often unreliable internet in the student dorms at Fichtenweg. Back then, there was no proper network management. A few student tutors paid by the Studierendenwerk were responsible, but it didn’t work very well.

The dorms at Fichtenweg were likely connected by fiber optic cables already in the 1970s, as this was modern technology at the time.

The dorms on the Wanne hill were connected early on to what we call the WHO network – named after the Waldhäuser Ost area and its network.

At first, Netz-AK only worked in the WHO area. Later, a few small locations were added: one volunteer at Hartmeyerstraße and four to five volunteers in buildings of the former Hindenburg military base (now in the French Quarter), which were connected to the network after renovations in 2006.

After the student unions of Tübingen and Hohenheim merged, the network supported by Netz-AK grew significantly in 2014. It now covered a large area from Geislingen an der Steige through Hohenheim, Nürtingen, Reutlingen, and Tübingen to Albstadt and Sigmaringen. The number of managed connections increased from around 3,000 in Tübingen to over 5,500.

Even though we expected the team to grow with the network, the opposite happened – the team got smaller. The original WHO team was only joined by one member from the French Quarter. Still, we managed to keep the network running for over ten years with very limited resources.

Since 2022, things have improved thanks to internal changes at the Studierendenwerk. For the first time in years, we were able to do more than just keep things running.

We finally got the chance to make overdue purchases. We now also have access to the teilAuto car-sharing system.

Our cooperation with the Studierendenwerk’s IT department has improved a lot, and the new leadership is very supportive.

Our team in Tübingen has grown and now includes more active students again.

Since 2023, we’ve also been taking part in the annual Student Network Meetings (SNTs) again.

In 2024, we gained an active member in Hohenheim. In 2025, someone joined us in Albstadt.

In 2023 and 2024, we tested new hardware, which we finally decided to buy in 2025. The Studierendenwerk has now completed the purchase.

We also made many smaller but important improvements: we set up basic network monitoring, improved our backup strategy, and introduced a ticket system for support requests. All of this makes our work much easier.

In 2023, we founded our own association. We expect it to be officially recognized as a non-profit organization soon. At the same time, we are finalizing an agreement with the Studierendenwerk that will define our future cooperation.

Starting in June 2025, we will begin the final big step: installing the new hardware in the remaining 100 buildings. Two buildings have already been completed. About 275 switches still need to be installed.

For this, we urgently need more helpers. Even short-term help is very valuable and supports a network built for the future.

If you want to join us long-term, there are many exciting projects waiting. We can now finally start bringing Wi-Fi to the kitchen areas. We are also planning to introduce IPv6 and restructure the subnet system. Any kind of support is welcome.

There are also great opportunities for those who want to dive deeper: for example, by organizing workshops to teach other students about how our network works. Or by running your own nerdy research projects in computer networking and sharing your findings with the group.

2025-03-26 Heuberger-Tor-Weg

In Heuberger-Tor-Weg 15 two switches probably did not survive the power outage.

If we can not revive them, we will exchange them today.

Update: The replacement of the broken switch was completed at 7:24 PM. Everyone is online again.

Thank you to the kind resident for the friendly words and the tea you gave me!

2025-03-21 big changes on core

On March 21, 2025, we will finally install our new MikroTik Cloud Core Router – CCR2216.
All important devices in our network have names. Our new core switch from MikroTik is called “Corey McRotik.”

As the central core switch, it connects all our network segments.

Many people don’t realize that we run a real, independent network.
All student dormitories in Geislingen an der Steige, Hohenheim, Nürtingen, Reutlingen, Albstadt, and Sigmaringen are connected to us in Tübingen and meet here at Fichtenweg 5.
(This is also why we cannot simply add dormitories that are connected via DSL, like those in Rottenburg, to our network.)

During the upgrade, all dormitories will go offline one or multiple times for a short period, depending on how we need to switch the fiber optic connections.

We chose Friday during the semester break to minimize disruptions for students and avoid interfering with the Studierendenwerk.

Our homepage is no longer hosted on a server at Fichtenweg—it is now hosted externally.
The main reason for this change was a series of power outages in our server room, which not only took all dormitories offline but also made our homepage unavailable.
We don’t expect frequent power outages, but with this change, we can provide more reliable updates in case of problems.

In short:

No need to worry, no emails, and please do not report the planned outage on Friday at 6:00 PM—we are aware of it.
We will be in the server room, literally holding cables in our hands.
We will update this message once we are finished.
If you still have problems after restarting at least one router, please contact us immediately via the contact form.
We will stay on-site for a few more hours to fix configuration issues or, if necessary, undo changes to keep the internet downtime as short as possible.

If you are interested in large networks, feel free to contact us (contact form: Mitmachen).
No prior knowledge is needed!
This year, we will replace switches in over 100 buildings—it’s manual work, so every helping hand is welcome.

If technology is not your strength, but you still want to help, we would really appreciate it.
As you can see from this not-so-perfect text, we could also use someone who can write better texts, design announcements, or simply organize tasks.

Right now, we are mainly active in Tübingen, but we already have one person in Hohenheim who recently joined to help on-site.
We really appreciate people outside of Tübingen because you can reach locations faster.

For example, you could help someone in a dorm with router issues, check if a construction crew accidentally cut a fiber optic cable, or look in the basement to see if a power outage is causing a network problem. All of this is much more difficult for our volunteer team in Netz-AK to handle from Tübingen.

6:16 pm update: after 4 minutes of downtime we finished. If anything is different for you, contact us!

Christmas 2024

The Christmas season – for many, a time of reflection and peace. But for us at Netz-AK, it stays busy! Even during the festive season, we’re here for you. Whether it’s sudden technical issues or those little things you’ve always wanted to configure properly – we’ve got your back!

Of course, there are limits: if solving a problem requires “paid staff,” many of them are rightly on holiday now.

Why? It’s simple: volunteers rock!

A big thank you to everyone who helps us keep going. A special shout-out to the caretakers, Carmen Braun, Mrs. Horrer and Mrs. Hein.

Wishing you a Merry Christmas and a great start to the new year!

Your Netz-AK Team