SharePoint document library properties–“The request was rejected by the HTTP filter”
Bizarro error today. I published a SharePoint site today through TMG. Everything looked great until you went to view/edit the properties of a document in a document library. I got the following error:
“Error Code: 500 Internal Server Error. The request was rejected by the HTTP filter. Contact the server administrator. (12217) “
Trying the same actions on any other list/library worked fine; just not for a document library.
The problem turned out to be related to HTTP filtering in TMG.
To fix the issue, Open the properties of the firewall policy. Click Filtering > Configure HTTP under the Traffic tab.
Uncheck Verify normalization.
Save and apply changes and you should be all set.
Verify normalization will block URLs containing escaped characters after normalization.