Hello.-
We have a TMG 2010 which main service crashes randomly. This is a SP2 Roll Up 4 and windows 2008 R2 full patched. The error reported is:
"The Firewall service stopped because an application filter module C:\Program Files\Microsoft Forefront Threat Management Gateway\GwpaFltr.dllgenerated an exception code C0000005 in address 000007FEF40422B4 when function CompleteAsyncIO was called. To resolve this error, remove recently installed application filters and restart the service"
SU 1 for Service Pack was applied and following Roll Ups to number 4. Roll Up 5 points out to a issue related to DiffServ filter, but in our case this filter is not enabled.
There is no a specific condition when service fails, this happens after some time (even weeks) running without problem, even with less load than usual.
Thanks in advance.