ntop is a network traffic probe that shows the network usage, similar to what the popular top Unix command does. It has a NetFlow/sFlow emitter/collector, an HTTP-based client interface for creating ntop-centric monitoring applications, and RRD for persistently storing traffic statistics.
ntop has been designed to be simple, performant and easy to use. It has been developed, tested, and deployed by a large user community on various networks and environments.
ntop can use a web browser (e.g. Firefox) 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.
- 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 identity (e.g. email address) of computer users.
- Passively (i.e. without 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 (who’s 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.
- VoIP support (SIP, Cisco SCCP and Asterisk IAX).
- NetFlow (including v5 and v9) and IPFIX support.
- 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.
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