...Requirements:
* Network tap or L2 Managed Switch with option to mirror traffic to specified port
* Windows XP 32-bit (or better)
* .NET Framework 4.0 (or better)
* WinPcap 4.1.3 (in archive)
* Microsoft Visual C++ 2015 Runtime (x86) (in archive)
If your gateway is powered by Windows, you can try to run this app and select Network Interface which is connected to Local Network. It should work but I did not test it. L2 switch in this case is not required.
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Donation balance $0
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gives an overview about the hosts connected with your computer
...Moreover netObservator provides support to analyse your connections. netObservator is a simple to use sniffer app. You can visualize the traffic by the plotting dialogs or the interactive statistics dialog.
For a quick start just select the device of your internet connection and click the "Run"-button. If you press this button a second time, the program will stop to sniff.
Only information about the first packet of a connection with a host will be displayed. This will give you an overview of the hosts you are currently connected with.
There are Plotters for the traffic and an interactive Statistics dialog. ...
NetSeer is a Windows based (XP, 7, 2000 - 2008) network traffic visualization tool. NetSeer listens for traffic, renders connections in treeview and in a graphic radar screen in the right pane.
BitDHT is a LGPL'd general purpose C++ Distributed Hash Table library. It is designed to take hassle out over creating your own DHT. BitDHT is compatible with bitttorrent's DHT and can leverage this network to bootstrap your own personal DHT.
HPServer is a free, open-source light-weighted framework for concurrent networking software.
Some traits of HPServer:
object-oriented
cross-platform (support windows & linux)
event-driven
support I/O events, timer, and signals.
support multi-thread.