I have a FritzBox 4040 with OpenWRT 24 behind a FritzBox 7490.
Since I just started using OpenWRT, I made a mistake and can no longer access the Fritzbox 4040 with IPv4. I can access the box via IPv6, but only for one minute.
When the 4040 starts up, all five LEDs briefly flash and the power LED lights up. After approximately one minute, the power LED turns off, and the connection to the 4040 is interrupted.
Does anyone know how to put the box into recovery mode?
After two days of researching online, I would be very grateful for any advice.
I have worked with Debian for many years and am therefore not afraid of the console.
I never managed to get my FB 4040 into recovery mode, no matter which (combination of) buttons I pressed during power up.
If you have IPv6 connectivity for a limited time, you could ssh into the box and run firstboot -y && reboot
to go back to openwrt default settings
Next option would simply be to install openwrt as you did in the past.
As a last ressort you could use the AVM recovery tool to go back to stock AVM firmware.
Connect your Debian with a network cable to a LAN port on the Fritbox
Edit the script below to match the correct "dev" network interface and the correct "image" image file.
And exec this script (before powering the router with its power supply):
#!/bin/sh
set -e
dev="eth0"
#image="openwrt-19.07.7-ipq40xx-generic-avm_fritzbox-4040-squashfs-eva.bin"
#image="openwrt-23.05.0-rc2-ipq40xx-generic-avm_fritzbox-4040-squashfs-eva.bin"
image="openwrt-24.10.2-ipq40xx-generic-avm_fritzbox-4040-squashfs-eva.bin"
if [ ! -f $image ]; then
echo "the file $image not exist"
exit 1
fi
ip link show dev "$dev"
if [ $? -ne 0 ]; then
echo "The interface $dev not exist"
exit 1
else
ip link set down "$dev"
ip addr flush dev "$dev"
ip link set up "$dev"
ip addr add 192.168.178.2/24 dev "$dev"
while ! ping -c 1 -w 1 192.168.178.1 > /dev/null 2>&1; do
ip link set up "$dev"
echo "wait 1 second"
sleep 1
done
sleep 1
# The user name is real adam2 and the password is adam2
tnftp -n -v -q 150 -p "192.168.178.1" << EOF
quote USER adam2
quote PASS adam2
binary
quote MEDIA FLSH
put $image mtd1
EOF
echo "command exit $?"
fi
Start the router (power it with its power supply) and wait for it to proceed with the installation
when I did the installation I noticed that the "ftp" package present in debian does not work while the "tnftp" package does
see this line: “(tested with tnftp, -p activates passive mode by default and -q sets a timeout) (tested also with RPi3b and normal ftp, works fine. DG)”
I don't believe (I assume that)
I see that there is an updated OEM firmware compared to the version I had installed before switching to Openwrt
