If you are trying to determine what cloud-based services are running through your network, try using Skyhigh Networks. They analyze traffic and provide a nice set of analysis regarding services accessed, by whom, and the relative security threat. http://www.skyhighnetworks.com
My ques is can you identify a packet received in your network that whether it has some relation to cloud data or other web services?... i want to classify cloud traffic with other internet traffic..
You can try to use one of network sniffers such WireShark, CommView, etc. They allow you to intercept all packets and classify its by using variety of specified filters. After analysis you will be able to separate traffic and distinguish different services.
If you try to turn off most of network process like Skype, Torrent, all updates, and use only your Cloud services, you can determine exactly which packets are belongs to your service. After that, you can precisely adjust your filters and count only Cloud traffic.
Good luck! Let us now about your progress and solutions.
You can check the DSCP value in captured IP packets, and the classify you traffic according to it. Just try to use different software and find the best for packet capturing.
For example, WireShark allows you to save all captured packets and then analyse them in many ways. However, it requires a lot of free space on you HDD, because you physically save all your's traffic.
In difference, CommView just save the log file, which require very small space. In addition CommView provides good statistic results with classification by packets size, and protocols on Network, Transport and Application layers of ISO/OSI model.
Sometimes software functionality is different. And I always use few products in my work, to get more comprehensive results.
Please describe what kind of Cloud we are talking about? It is really important for everyone to understand what you meant by Cloud and Cloud traffic. I mean what group of Cloud - IaaS, PaaS, SaaS? Or by cloud, do you just mean the cyberspace ?
The paper by Wang et. al "A novel statistical automaton for network cloud traffic classification" discuss about classifying the applications based on their packet/signature, but I don't really think that clarifies the fact about Cloud type or traffic.