Hi @all,
we are currently testing the Malware Inspection Feature one TMG 2010 (7.0.9193.515) and I have come over some difficulties.
Some Downloads are slow. I tested it with this Link: http://support.ts.fujitsu.com/Download/Showdescription.asp?SoftwareGUID=18A38D91-7AD3-4C45-97F9-9A3F9A645A76 . Its a Server Monitoring Software from Fujitsu. When I enable Standard Trickling as Content Delivery Method the Download takes about 11 minutes. Without Malware Inspection on the TMG it takes about 6 minutes. So thats ok. When I enable Fast Trickling the Download lasts over one hour. Performance shows about 25% CPU Usage and about 2 GB of RAM (Server has 4 GB). The Client is Windows 7 with IE8 and the TMG as Proxy Server. DNS Servers are only configured on the LAN Interface on TMG. The Scanfolder is not located on the Systemdrive.
Another issue is that some files are recognized as encrypted and blocked, although they are not. And sometimes after a few tries the file is being downloaded. Here are some exampleshttp://mirrors.igsobe.com/ubcd/ubcd511.iso andhttp://ftp.beratungstechnologie.de/Sonstiges/Msp/2_patchRepairMsi.msp .
If you need more details, I'll write them.
Thanks in advance, Benny