I have a windows 2003 vps and I need way monitor how much traffic I make per month. I believe I'm getting close to my quota and I need to measure it. I've seen some nice free programs that claim to work on windows 2003 server but the fact is they don't use a service so they only work while the GUI program runs, which is obviously silly for a server! What do you guys use for this? I mean other then web traffic tools since most of my traffic is not HTTP!
You can use bandwidth monitoring tool which is supported by your Operating system i.e. bwmonitor.com. Also, you can ask to your VPS provider to provide the graph to check bandwidth usage of your VPS. Many virtualization software have inbuilt functionality to monitor the bandwidth usage.