FRITZ!Box 7390 Service - Knowledge Base

FRITZ!Box 7390 Service

Network device cannot be renamed

Network devices (such as computers, smartphones, game consoles) cannot be renamed in the home network overview of the FRITZ!Box user interface. The FRITZ!Box may display the following error message:

  • "The name contains illegal characters. Computer names may contain only letters (a-z, A-Z), numerals (0-9), and hyphens (-). The name may not be made up of numerals only."

Note:The configuration procedure and notes on functions given in this guide refer to the latest FRITZ!OS for your FRITZ!Box.

1 Name contains illegal characters

Remove all illegal characters from the names of the network devices:

  1. Click "Home Network" in the FRITZ!Box user interface.
  2. Click "Home Network Overview" in the "Home Network" menu.
  3. Click on the "All Devices" tab.
  4. Click the entry "Details" that corresponds to the network device you would like to rename.
  5. Enter a name of your choice that does not contain special characters for the "Name".

    Note:The names of the network devices are DNS host names. Therefore, only use standard Latin letters (not letters such as ä, ë, ö, ü, á, é, í), numbers and hyphens (-). The name may not consist of only numbers.

  6. Click "OK" to save the settings.

2 Connecting the network device to the FRITZ!Box over the guest network

You can only use the FRITZ!Box user interface to rename network devices that are connected to the home network. Devices that are connected to the FRITZ!Box by means of the wireless guest network or LAN guest network cannot be renamed in the FRITZ!Box.

Note:The FRITZ!Box displays devices with their host names if the devices report them to the FRITZ!Box when they obtain their IP settings via DHCP. Network devices that do not report their host name to the FRITZ!Box are displayed with their IP address (for example "PC-192-168-178-20").

3 FRITZ!Box is configured as an IP client or repeater

Network devices cannot be renamed in the FRITZ!Box user interface if the FRITZ!Box is configured as an IP client or wireless repeater. In these operating modes, the FRITZ!Box adopts the names of the network devices from the upstream FRITZ!Box or FRITZ!Box configured as the wireless access point.