For the past four years I have been using an rfid/keypad (Wiegand) access s=
ystem for my home. Several weeks ago I noticed that my desktop computer (Wi=
ndows 10 Pro) which hosts the icCard program to control the system could no=
 longer connect with the controller board. I installed the software on a re=
latively clean laptop, also Windows 10 Pro, and had the same results. The s=
oftware installs and appears to run fine but any attempts to access the con=
troller board produce a "comm failure" error.=20

I installed the same software on a Windows 8.1 VM running on a Windows 2012=
r2 Hyper-V server and everything works fine from there. Apparently somethin=
g happened to Windows 10 to make it block this sort of communication. I thi=
nk it uses UDP but I have not attempted to analyze the traffic.

Does anyone have any idea what is going on here? I would really like to get=
 back to managing this system from my normal workstation.

Thanks,
Allen


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