Internet Explorer 9 and 10 is crashing (not IE10, Chrome and Firefox) when users go to web sites that are blocked by policy. It also happens when visited web sites attempt to connect/get content from web sites that are blocked by policy as well.
UTM 9.35 with the following settings:
-HTTPS Scan Settings: "URL filtering only"
-Transparent mode with Active Directory SSO
As of yesterday, IE9 and IE10 was crashing constantly and I saw five sites being "block" in Web Filtering Live Log so I added those URLs into existing "Exception List" for Microsoft sites; here's what we had in that exception list before:
Skipping: Authentication / Block by download size / Extension blocking / SSL scanning
Matching these URLs:
^https?://([A-Za-z0-9.-]*\.)?windowsupdate\.com/
^https?://([A-Za-z0-9.-]*\.)?microsoft\.com/
After watching Web Filtering Live Log for a while, I have changed that exception and seems like IE9 and IE10 is not crashing now as long as users do not attempt to visit site that is blocked by policy etc.
Here's that exception list after change:
Skipping: Authentication / Block by download size / Extension blocking / URL Filter / SSL scanning
Matching these URLs:
^https?://([A-Za-z0-9.-]*\.)?windowsupdate\.com/
^https?://([A-Za-z0-9.-]*\.)?microsoft\.com/
https://iecvlist.microsoft.com
http://crl.microsoft.com/
http://ie9cvlist.ie.microsoft.com/
crl.microsoft.com
Is there a solution to that problem? Seems like when users attempts to visit https site that is block by policy, the IE9 and IE10 will crash but not IE11, Chrome and Firefox.
Thanks guys,
Mark
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