To access Stud.IP , you need a y-number, which you will receive when you enrol via TUConnect.
What is a y-number? This is the number with which you can print at the university and also use the TU-wide W-LAN. You will also receive a name@tu-bs.de e-mail address. You should activate the e-mail address as early as possible in order to receive all information about the start of the semester etc.
In the Gauß-IT-Zentrum, the computer centre of the TU, you will find all the important information about the IT services (Y-number, VPN, print account, free software etc.) that you can use during your studies.