Hi,
to avoid duplicates, I am going to close this tread in favour of No more access to ipfire - Core 150 | Location-Filter.
Please find all relevant information about this issue, the progress we made while solving it, and other aspects in this post in the mentioned thread.
No offense is intended, we just try to keep track of one problem in one thread. Thanks for your understanding. 
Thanks, and best regards,
Peter Müller