Be careful, you need to send the full command here you ask for a wrong file name (in fact 2 filenames).
- zImage-re
- scue-3.14-r0-dm900-20190911.bin

It's 1 name, zImage-rescue-3.14-r0-dm900-20190911.bin

Click on the link, and you will get the file, if you break up the name it's normal you have a 400.

https://dreamboxupdate.com/opendreambox/...00-20190911.bin

I copied you the text properly... without the filename broken... I recopy you it.

Code:
cd /tmp
wget https://dreamboxupdate.com/opendreambox/2.5/stable/images/dm900/zImage-rescue-3.14-r0-dm900-20190911.bin
flash-rescue /tmp/zImage-rescue-3.14-r0-dm900-20190911.bin


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