Uboot problem with FRiTZ!Box 7530

Installing and Using OpenWrt
1

This summer I've started experimenting with a FRiTZ!Box 7530 after successfully using it on a 4040 (which has no modem). The test was successful. I installed OpenWrt and was surfing with 200+ MBit/s after utilizing this guide:

Unfortunately I didn't take any notes. After a successful test, I used AVMs recovery tool and flashed the original firmware.

Now I can't seem to repeat the process. No matter which IPs I use (192.168.178.1 or 192.168.1.1 for the box and 192.168.178.10 and 192.168.1.70 for my laptop) I always get this error:
Traceback (most recent call last):


  File "/home/grindel/Entwicklung/openwrt/FRiTZ!Box 7530/openwrt/scripts/flashing/./eva_ramboot.py", line 28, in <module>
    ftp = FTP(args.ip, 'adam2', 'adam2')
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.12/ftplib.py", line 121, in __init__
    self.connect(host)
  File "/usr/lib64/python3.12/ftplib.py", line 158, in connect
    self.sock = socket.create_connection((self.host, self.port), self.timeout,
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.12/socket.py", line 852, in create_connection
    raise exceptions[0]
  File "/usr/lib64/python3.12/socket.py", line 837, in create_connection
    sock.connect(sa)
OSError: [Errno 113] No route to host

Any idea what I'm doing wrong?

2

"No route to host". Your PC has no route to access the IP of the router. So you are trying to access an IP outside your current subnet, and there is no default gateway assigned. (The latter is not needed, just provide the right subnet.
Maybe you assigned the wrong subnet mask? It should be 255.255.255.0 or /24, depending on your OS