IT Services

Assignment of dynamic IP addresses for laptops (DHCP)

The TU Berlin operates an extensive WLAN network. Therefore, you can always log in your laptop with your tubIT account to the TU Berlin WLAN and work wirelessly.

However, if you need a wired network connection to the computer network of the Institute of Mathematics, you can use the DHCP server of the Institute of Mathematics to get a dynamic IP address for your laptop under the conditions of the user rules of the IT department of the Institute of Mathematics.

You need an Ethernet card with TP connector (also called RJ45) to connect a network cable to your laptop. Either you have an internal port in the laptop or you have a corresponding adapter (USB/USB-C/Thunderbolt Ethernet or similar). You also need an Ethernet cable (also: TP cable, at least Cat5 patch cable).

To use the DHCP service, please fill in the form opposite and contact the Systemadministration.


Determine hardware Ethernet address

You need the hardware Ethernet address of your laptop, also called MAC address, to register for the DHCP service. This address is a 6-digit hexadecimal code. The six hexadecimal numbers are separated by semicolons. The code is globally unique and identifies your laptop to the DHCP server. Read in the adjacent table how to determine the MAC address!

If your laptop has multiple network interfaces, such as for WLAN and fixed network, then please make sure that you pick out the hardware Ethernet address of the LAN interface.

If you have registered, you still need a connection socket patched into the computer network of mathematics for your Ethernet cable in the office. Please do not, under any circumstances, remove a telephone or office workstation port to connect your laptop! Contact the central Systemadministration (staff) to find out the number of a patched can in your room!

Unixifconfig -aOpen a shell and run the command. If the output is too long, you can also type "ifconfig -a | more" and continue with <SPACE> each time until you reach the relevant entry.
MS Windowsipconfig /allSelect "Execute command" in the Start menu, enter "cmd" and execute "ipconfig /all" in the terminal that opens.
macOSread the address from the system profilerSelect "About this computer" in the Apple menu. Select "More Information" in the window that opens. In the System Profiler that now opens, find "Ethernet" under Network, click on it, and in the information window at the bottom, find the entry under "Mac Address".