Internet access in residential home

Tenants of the residential homes can access the university network and the Internet by means of a network card/adapter. Access to the university network is provided by the Studierendenwerk. No active network components such as WLAN routers may be connected, as this can disrupt the entire university network and enable access for third parties. The signed user regulations for residential homes apply.

Technical requirements

The following requirements must be met:

  • LAN connection, on the device, must be available; alternatively USB LAN adapter.
  • LAN cable (min. Cat6)
  • IP address must be obtained automatically
  • No proxy may be used

Internet access in the residential homes Nordhäuser Straße 78 and 79


In each apartment, the data socket with the odd number is activated and can be used with a data cable (at least Cat6) with up to 1 Gbps. No access data and no special configuration are required. Every operating system automatically connects to the university network in the default configuration. No WLAN routers may be connected! For devices without a network connection, a USB LAN adapter can be used. If more than one device is to be connected, a simple switch can be used.

WLAN (eduroam)

eduroam (WLAN) is available in both residential homes. The reception strength varies in the rooms for technical reasons. In addition, the environmental conditions change constantly, so the quality of the connection can fluctuate. Other wireless devices in the 2.4 GHz band and microwaves in particular have an influence. Ideally, no other wireless devices should be operated in the residential home, especially no own WLAN hotspots (not even on the smartphone, TV, printer, etc.!). These own hotspots lead at least to a power login in a larger radius for all other users in eduroam (WLAN). Voice connections via eduroam (WLAN) can work, but are not guaranteed, as eduroam is generally not designed for this functionality. The quality of the connection also depends on your own end device, i.e. quality of the antenna and transmission power.

Internet access problems

The following problems may occur

  • LAN cable defective
  • Blocking of the connection by the operating system's own firewall
  • Contamination of the device by malware
  • WLAN reception is poor or does not connect
  • blocking of the network socket because of interference coming from a device in your room
  • you have more than one device that needs internet

Approaches to solving problems

  • check the LAN cable between the network socket and the network card/USB LAN adapter; the cable must audibly click into place on both sides - the plastic tab on the plug must not be broken off
  • the LAN cable used must be a shielded data cable (at least category 6), no telephone cable may be used
  • the network settings on the device must be correct (obtain IP address and DNS server automatically)
  • test your own device at another network socket in the residential home (e.g. neighbor's room) and test another device (e.g. from neighbor/acquaintance) at your own network socket
  • Call the command prompt for Windows operating systems: press the keys Win+R and enter cmd in the window; in the command prompt enter ipconfig /all, if DHCP is activated it must say "yes", if necessary enter ipconfig /release (the IP address should then be displayed), then call ipconfig /renew
  • if more than one device should be connected, a simple switch can be used

Does the problem still exist?

Register with us and provide the following information (see business card for contact information):

  • Date and time
  • Residential home and apartment number
  • Number of the network socket
  • Error description

Problems with eduroam (WLAN) in the residential home

  • Test own device at another location (cafeteria, library, etc.)
  • change the location of the device in the room slightly (e.g. move it to the desk)
  • check your user account for correctness in the user portal
  • do the configuration on the device again eduroam (WLAN)

Register with us and provide the following information (see business card for contact information):

  • Date and time
  • Residential home and apartment number
  • MAC address of the WLAN card
  • User name of the university account
  • Error description
IT Service Desk
Service area
(University Computer and Media Centre)
C21 - Centre for Communication and Information (KIZ) / Room 0.11