>>>>> On Fri, 18 Jun 2021 08:37:52 +0200, Andreas Heinlein <aheinl...@gmx.com> 
>>>>> said:

    > Now it is '127-0-0-1/8 192-168-10-123'. Yes, including the slash and the 
space.
Didd you upgrade to a newer FAI version?
In FAI 5.10 we changed some IP detection in get-boot-info. Maybe this
leads to this weird hostname.

There's a fix in FAI 5.10.3 which may help you:
https://github.com/faiproject/fai/commit/e85717d2efc94e221c16502c30fdc9fda769aa27
-- 
viele Grüße Thomas

Antwort per Email an