ntop 3.3

ntop is a network traffic probe that shows the network usage, similar to what the popular top Unix command does.
The project is based on libpcap and it has been written in a portable way in order to virtually run on every Unix platform and on Win32 as well.
ntop users can use a a web browser (e.g. netscape) to navigate through ntop (that acts as a web server) traffic information and get a dump of the network status.
In the latter case, ntop can be seen as a simple RMON-like agent with an embedded web interface. The use of:
a web interface
limited configuration and administration via the web interface
reduced CPU and memory usage (they vary according to network size and traffic)
make ntop easy to use and suitable for monitoring various kind of networks.
Main features:
- Sort network traffic according to many protocols
- Show network traffic sorted according to various criteria
- Display traffic statistics
- Store on disk persistent traffic statistics in RRD format
- Identify the indentity (e.g. email address) of computer users
- Passively (i.e. withou sending probe packets) identify the host OS
- Show IP traffic distribution among the various protocols
- Analyse IP traffic and sort it according to the source/destination
- Display IP Traffic Subnet matrix (whos talking to who?)
- Report IP protocol usage sorted by protocol type
- Act as a NetFlow/sFlow collector for flows generated by routers (e.g. Cisco and Juniper) or switches (e.g. Foundry Networks)
- Produce RMON-like network traffic statistics
Additional features of "ntop":
- Network Flows
- Local Traffic Analysis
- Multithread and MP (MultiProcessor) support on both Unix and Win32
- Perl/PHP/Python lightweight API for accessing ntop from remote
- Support of both NetFlow andsFlow as flow collector. ntop can collect simultaneously from multiple probes.
- Traffic statistics are saved into RRD databases for long-run traffic analysis.
- Internet Domain, AS (Autonomous Systems), VLAN (Virtual LAN) Statistics
- Network assets discovery and categorization according to their OS and users
- Protocol decoders for most of known P2P (Peer to Peer) protocols
- Advanced per user HTTP password protection with encrypted passwords
- RRD support for persistently storing per-host traffic information
- Passive remote host fingerprint (Courtesy of ettercap)
- HTTPS (Secure HTTP via OpenSSL)
- Virtual/multiple network interfaces support
- Graphical Charts (via gdchart)
- WAP support