Web Application Firewall

This transfer is blocked by a Web Application Firewall.

This transfer is blocked.
URL http://www.matriznet.dgpc.pt/MatrizNet/Objectos/~/CommonServices/FileDownloader.axd?fileId=226280&IdReg=200424&TipoReg=1&fileIsToDownload=true&fileName=1939.jpg&fileType=
Event ID 90300017
Event Type signature