Traffic has been blocked from this application (ntoskrnl .exe) SEP11
major irritation that seems linked to the SEP firewall
on both XP (x86) and Windows 7 (x64) with SEP11 MP3 and RU5 respectively we frequently get this annoying popup when the location changes.
Can be reproduced pretty reliably.
Turning off intrustion prevention notifications notifications does not help.
If there is no firewall policy assigned, the popup does not appear, which means the cause is not IPS or locations on their own. It seems to be teh application of a set of firewall rules causes the popup.
We have seen this since about a year now, which is when we first started using the SEP firewall.
Other contributors have seen it for even longer. Please see this closed discussion:
IS THERE HOPE? Possibly - RU6 MP2 includes a fix for this. Testing will show if this popup is banished by the fix or not.
There have also been suggestions about modifying firewall rules, but not sure if anyone has a trick to do this without unintended side effects such as blocking desired traffic or allowing undesired traffic.