Sophos XG "blocks" webtraffic without any internet policy in place

Hi all,

I have a Sophos XG (18.5.2) Sophos XG that "blocks" webtraffic/downloads sometimes.

The Inside Out rule (Access) is without any internet policy in place and no security feature is enabled.

Web browsing and file download is fine in general but...

As an example the Microsoft Office Update file will not download. No error/warning in Sophos logfile but Download simply does not start.

In Front of PC is a AVM Fritzbox as DSL Router. connecting the PC directly to the Router download starts without any problem.

So problem MUST BE in sophos. But where?

Any hints?

Best Gernot