No internet on LAN and WIFI after config restore to new Fritzbox

Dear Forum Participants,

In order to set up an additional network segment in a newly furnished flat in my house, I bought a Fritzbox4040 (devicename=FB4040-205) and saved a configuration backup from another Fritzbox4040 with which I make the network in our flat (devicename FB4040-201). I read this configuration backup into the new Frotzbox 4040, adjusted the new IP addresses for WAN (, LAN (, WIFI ( and then connected the device. Under its IP, FB4040-205 is reachable from its LAN interface.

The Fritzbox 7590AX (IP192.168.200.1), which does the Internet, has a configuration that takes FB4040-205 into account, but only shows it as "device not currently in use". Another Fritzbox (FB4040-201) has Internet access via the Fritzbox 7590AX. The FB4040-205 has no Internet access (not via LAN and not via WIFI).

A ping from FB4040-203 to the IP already fails.

Where can I look for the error?

Firmware version: OpenWrt 22.03.5 r20134-5f15225c1e / LuCI openwrt-22.03 branch git-23.119.80898-65ef406

should give you device access again.

In general, moving config tarballs between different devices (or OpenWrt versions) -even if both are the same model- is not guaranteed to be safe, as it may include device specific information (e.g. MAC addresses). While I have no idea if that's the case with the Fritz!Box 4040, it's better avoided and the device set up individually by hand again.

1 Like

OK, thank you for the information.
I'am going to flash again and make the setup from hand new!