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WiFi

WiFi at TU Chemnitz

The wireless local area network builds the wireless part of the campus network at the TU Chemnitz. It supports students when preparing for the lectures or when searching for details afterwards. Gaining mobile access to e-mails, time tables or course enrollments simplifies the every day life of students and staff.

Eduroam

Eduroam is the recommended WiFi access technology at TU Chemnitz. Once configured, eduroam enables WiFi connectivity at almost all universities in Germany and many universities worldwide without reconfiguring your device.

Who can use eduroam?

  • Students at TU Chemnitz
  • Staff members at TU Chemnitz
  • Guests from other universities which are part of eduroam
  • Guest with a short time guest account

Configuration

Configuration instructions differ for each operating system. The easiest way to securely configure your device is to use the configuration assistent. Choose your operating system from the list below and follow the instructions.

Android from Version 4.3

Use the configutaion App for Android. This is the only way to configure secure access to the network.

  1. Download the "eduroam CAT" App from Google Play Store. You need access to the Internet (UMTS/LTE, WiFi at home).
  2. Create an App and device password of type WLAN at the Identity Management portal. Copy the generated password to the Android clipboard.
  3. Download the configuration file. Android will detect this and start the App.
  4. Fill in the field Username: user@tu-chemnitz.de ein. Replace user by your URZ account.
  5. Fill in the password field with the generated app and device password.
  6. Eduroam is configured.

You will find detailed instructions (in German) with screenshots in our blog.

Download the app

App herunterladen.
App herunterladen

Download the configuration file

Konfiguration herunterladen
Konfiguration herunterladen

Configuration instructions for old Android versions are available in German in our Blog.

iOS from Version 7

  1. Create an App and device password of type WLAN at the Identity Management portal.
  2. Download the configuration profile from the Identity management portal.
  3. Install the profile.
  4. Eduroam is configured.

Windows

  1. Connect to the Internet.
  2. Create an App and device password of type WLAN at the Identity Management portal. Select the password and copy it to the clipboard (CTRL-C).
  3. Download and start the configuration assistent for your windows version.
  4. Fill in the form: choose user@tu-chemnitz.de as username, replace user by your URZ account.
  5. Paste the generated password into both password fields (CTRL-V)
  6. Install the eduroam profile.

You will find detailed instructions (in German) with screenshots in our blog.

Windows 7

Download Windows 7 configuration assistent

Windows 8/8.1

Download Windows 8 configuration assistent

Windows 10

Download Windows 10 configuration assistent.

OS X ab Version 10.10

  1. Create an App and device password of type WLAN at the Identity Management portal.
  2. Download the configuration profile from the Identity management portal.
  3. Install the profile.
  4. Eduroam is configured.

Linux

Download the Konfigurationsskript. Execute it.

Using wget

$ bash -c "$(wget 'https://cat.eduroam.de/user/API.php?action=downloadInstaller&lang=de&id=linux&profile=74' -O -)"

Manuelly

Download Konfigurationsskript, execute it.

$ bash path/to/eduroam-linux-TUC.sh

Further information

Installation and configuration of 802.1x
Further installation instructions and tips can be read in our blog.
Configuration assistent

If you did not change your password for a longer time, authentication based on MS-CHAP methods will fail. Please set a new password in this case. In addition, we advise you on using the App- and device-specific passwords.

Additional WiFi networks

web-psk

  • For clients, that can't use eduroam (EAP-TTLS)
  • Secured WiFi with WPA2/PSK (pre-shared key = common key)
  • PSK: web-mit-psk
  • Authentification by web
    • Open any http-web page (no https)
    • Redirection to the register page → accept the certificate
      User Name: your login name @tu-chemnitz.de
      Password: your password
  • A https-capable web browser is required.
  • Known problems:
    • In some browsers the displayed font has to be enlarged to be able to mark the login area.
    • Getting the IP-address takes relatively long at the first time.

camo

special

  • Guests on e. g. congresses or conferences gain access to the internet
  • Secured WiFi with WPA2/PSK
  • Will only be activated by demand after consultation of the URZ
  • Alternatively, see also WiFi guest accounts

lab

  • WiFi for the controlling of devices in laboratory environments
  • only for registered devices
  • Functionality is close to eduroam, but communication between WiFi devices won't be blocked.
    • EAP-TTLS or PEAP with MsChap-V2
    • radius.tu-chemnitz.de, certificate Deutsche Telekom Root CA 2
    • login_name@tu-chemnitz.de or
    • WiFi-Account@lab.tu-chemnitz.de for guests
    • DHCP with assignmet of a fix IP address

An unauthorized extension of the campus network with WiFi is prohibited.

Infrastructure

Overview of TU Chemnitz WiFi network: clients, access pointsm controller

  • WiFi based on standard IEEE 802.11 a/g/n
  • The access points are logically connected with the central controllers by a special protocol CAPWAP. They send several WiFi networks at once.
  • The controller configures the access points and controls the connection to the clients.
  • The Wireless Control System (WCS) monitors the controller. Network services and configurations are created centrally as templates and passed to the controller.
  • The access control of the clients is done by the VPN Server in case of the WiFi camo. In case of eduroam and web-psk it is carried out by the radius server of TU Chemnitz, or the corresponding radius servers in the home institution of our guests.

Wireless coverage