I have a Windows 2000 dedicated server with more than 100 domains. I keep all the files of domains in specific directories, for example C:\hosting\domaincom is the domain's directory, C:\hosting\domaincom\www is the web site root (specified in IIS), C:\hosting\domaincom\mail (specified in mail server software) is the mail directory and C:\hosting\domaincom\logs is the domain logs directory (specified in IIS). Therefore I can see my domains's space usage, but now I want to see their bandwidth usage. I can see my server's traffic report by MRTG (from my hosting company). Is there anyway that I can see the bandwidth usage of the directories (C:\hosting\domaincom for instance) in the server?

Thanks in advance.

Here is a little tool that works pretty well (we don't use it, but know of others who do).
http://www.serverautomationtools.com/tools/1.5.html

Granted, it will only give you BW reports for HTTP traffic.

Hope that helps!