Bandwidth Monitor

We are having a problem with "something" on our network consuming all of
our internet bandwidth. It is an intermittent problem but becoming a REAL
problem. We suspect that the culprit may be our Windows SBS 2003. Does
anyone know of a utility or tool which I can install on my server that will
show specifics of what process(s) are using bandwidth, and how much?
Thanks.

You may try network monitor. these search result may help.
windows diagnosis report tools
Network Monitor - Network Monitor (NetMon) is a diagnostic tool that
monitors LAN and WAN, and provides a graphical display of network
statistics. ...
www.chicagotech.net/windowsreports.htm

How to troubleshoot using Network ...
Please download and install network monitor from the following
link: ... Run Network Monitor. On the start page, please select the correct
NIC to monitor. ...
http://www.chicagotech.net/netforums...pic.php?t=2357



--
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com
"Mark" <(E-Mail Removed)> wrote in message
news:eLNP4$(E-Mail Removed)...
> We are having a problem with "something" on our network consuming all of
> our internet bandwidth. It is an intermittent problem but becoming a REAL
> problem. We suspect that the culprit may be our Windows SBS 2003. Does
> anyone know of a utility or tool which I can install on my server that
> will show specifics of what process(s) are using bandwidth, and how much?
> Thanks.
>

"Mark" <(E-Mail Removed)> wrote in message
news:eLNP4$(E-Mail Removed)...
> We are having a problem with "something" on our network consuming all of
> our internet bandwidth. It is an intermittent problem but becoming a REAL
> problem. We suspect that the culprit may be our Windows SBS 2003. Does
> anyone know of a utility or tool which I can install on my server that
> will show specifics of what process(s) are using bandwidth, and how much?
> Thanks.

Just a hunch ... next time you observe it happening take a look at the
exchange output queues on your server. If they are full of non-delivery
reports then its a reasonable bet that your server is being used to delivery
Reverse-NDR SPAM(for details see
http://www.cryer.co.uk/glossary/r/reverse_ndr.htm). I first discovered this
when our internet connection seemed to be slow but slow because of the
amount of traffic being generated.

Hope you get to the bottom of it. Please post back when you find the cause
(and resolution) so others can benefit.
--
Brian Cryer
www.cryer.co.uk/brian