FAQ for "Access to the network"

Following groups have access to the wireless network of the TU Dortmund:

  • Members of the TU Dortmund (students and employee) with UniMail access
  • Members of other universities, their institutions have joined the DFNRoaming / eduroam initiative
  • Guest of the TU Dortmund with valid guest-access
To ensure that your wireless network can be integrated into the overall concept for wireless networks within the TU Dortmund, please talk to the ITMC first, to clarify the procurement of components and the integration of the access points in the network.

Please contact our Service Desk

The ITMC stores for a maximum of 4 weeks, the following data

  • User ID and assigned Internet address
  • Time of assembly and disassembly of the connection
  • Transferred data volume

For a detailed overview, see in the area connection data.

For this special case:

You don't have an UniAccount (but a permission to use the VPN service), there is a special website to change the password: VPN-Passwd

If you have a Vodafone Station router, occasional reboots of the device will help to fix problems with WLAN or VPN.

Using a Fritzbox with an older version than Fritz!OS 7.27 may lead to disconnects when connecting to our VPN.
In these cases we recommend upgrading the firmware.
If an error message saying "Der Systemadministrator hat Richtlinien erlassen, um diese Installation zu verhindern" appears when trying to download the Forcepoint Client, it might be because the Appstore of the device only allows downloads of apps verified by the Store.
In order to solve this you have to disable the S Mode (see link).

If you are connected to the VPN and can use your browser, but no other application can connect to the Internet, this may be related to the Windows firewall.

In this case, it may help to reset your firewall settings to default.
You can follow these instructions to do that.

Please use Ivanti Secure version 9.1.13.1 or newer(found here).

This error can occur on windows. This is cause by the activated 802.1X authentication of the virtual network adapter of the VPN-Client. You can deactivate the authentication by following this manual: 

Because of a security update you have to verify the developer "Ivanti Secure LLC" once when installing the Ivanti-Secure-Client.

You can follow the following instructions: Entwicklerverifizierung MacOS

If the Ivanti Secure Client from the Windows Store is installed on a device, the Ivanti Secure Client provided by us might not be able to be installed.

 

The usage of the Ivanti Secure Client from the Windows Store is not recommended, because it does not provide all funcionalities of our Client.

Uninstalling the Ivanti Secure Client from the Windows Store:

Press the Windows-Button => Click the gear icon (Settings) => Click on Apps => Scroll down to "Ivanti Secure (Ivanti Secure LLC)" and uninstall it

Afterwards our Ivanti Secure Client can be installed.

If you use a Wifi-adapter of the Intel 9000 series, follow these instructions.
You have to deactivate the filter for HTTPS traffic (see instructions).
Our VPN only supports IPv4.
As some publishers have IPv6 addresses, you have to deactivate IPv6 on your Client to enable access (see instructions).

If you connect to the VPN via a connectbox from Unitymedia/Vodafon and the connection is terminated after a short time, this can possibly be prevented by setting the MTU to 1280. 

 

 

Open the command prompt.

Run the ifconfig command and search for the WLAN/LAN adapter you are connected to the Internet with. On the left you will see the name of the adapter and after the term mtu the value for the MTU.

You can set the MTU value to 1280 using the following command:

ifconfig (name of the adapter) mtu 1280 up

You can then connect to the VPN.

The MTU setting is not persistent and will be reset on the next reboot.

Since we do not recommend changing the MTU persistently, you must thus change the MTU before each VPN connection (provided the computer has been restarted since the last connection).

If you get the following error message while trying to connect to the VPN

 

no EAP key found for hosts 'ipsec.stud.vpn.tu-dortmund.de' - '[Uniaccount]'

please check if the /etc/ipsec.secrets file is correct. It should look as following:

[Uniaccount] : EAP [Password]

Also confirm that there is an empty space after the Uniaccount.

No, please deactivate the VPN while using Cisco Webex or Zoom. You will help us save bandwidth.

Contact

ITMC

0231 755-2444
Otto-Hahn-Str. 12

Service catalogue (only German)