Hi, I have a 12 computer network, with 10 Windows 7 machines and two XP machines, and a PS3. The internet connection is Optu$ Cable. We do email, with very few attachments, and web surfing. Perhaps some online gaming is also occuring. Each day my outbound data seems to increment sugnificantly. Each month we seem to be sending out 6gigs of data, and I can't account for it. I've been though many security steps, including router configuration, using OpenDNS for content filtering, banning programs (Using Desktop Central), and locking down the PCs and browsers. There are no P2P programs that I can find, or Torrent clients seeding files on the system. Is there a way I can track what is going out? I've been using ActiveWall, but it's not a very good product and doesn't run as a service and requires that the system it's running on be logged in and operational. Even so, the packets sent according to it don't even come close to what Optu$ is say we've sent. I've also been watching the router's counters, and again, what it tells me and what Optu$ tell me are worlds apart. How can I find out what all the outbound data is, and stop it? Thanks Tanya

you can sniff around and see if you can find the data stream. You can capture data via wireshark http://portforward.com/networking/wireshark.htm you need a old HUB or a pc to use as a "man in middle" or install it on each PC plus NIC;s which be put in promiscuous mode. You need an old because it sends the traffic to every port, newer switches do not. If your switch is a managed switch, you may can cap the data via the switch. netstat -a will give a quick view of any connections to a PC.

Thanks for that. I dont have an old switch. I have a DGS-1016D D-Link gigabit switch. This connects to a DIR-655 router. All PCs connect via the switch. One of the PCs, an XP machine, is used as a server, it runs a few bits and pieces, I guess I could use that as the "man in the middle". Thanks Tanya

Hi Tanya, You may use Microsoft Network Monitor to test it. Please download it from the following link: Microsoft Network Monitor 3.4 For more information, please refer to the following KB article: Information about Network Monitor 3 If there is any issue encountered, I suggest posting a thread on Network Monitor Forum. Regards, Sabrina Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.