I just connected the country cable to the laptop but there came this Fritzbox page where inside the Internet use was blocked but WLAN works without a cable. What can I do? (Can't access the website because they don't know the password)
The LAN cable is obviously very good, otherwise the page would not come - everything has to be set appropriately in the fritz.box. Ideally the questions that administrates them.
If you have the FRITZ! Box side shows the LAN cable works.
It is likely that the MAC address of your LAN network card must first be in the FRITZ! Box to be released.