FRITZ!Box 6820 LTE Service - Knowledge Base
FRITZ!Box reports "The IP address is not available"
When you attempt to set up port sharing, the following error message is displayed:
"An error occurred. Error description: The IP address is not available. Please enter your data again. If the error occurs again, please consult AVM Support."
1 IP address is located in the guest network
You cannot set up port sharing in the FRITZ!Box for devices that are connected to it via the wireless guest network. The FRITZ!Box does not allow devices in the guest network (IP network 192.168.189.0, subnet mask 255.255.255.0) to be accessed from the internet.
2 A network adapter is using several IP addresses
You cannot set up port sharing in the FRITZ!Box for devices that use multiple IP addresses with a network adapter or MAC address. Currently, the FRITZ!Box does not support devices that use several IP addresses with the same MAC address (for example virtual machines with manually assigned MAC addresses that are used by several devices in the home network).