ntop – network traffic software

ntop is an open source network traffic probe that shows the network usage, similar to what the popular top Unix command does. ntop is based on libpcap and it has been written in a portable way. It includes support for popular tools and protocols such as NetFlow, sFlow, and RRD.

ntop is a hybrid layer 2 / layer 3 network monitor, that is by default it uses the layer 2 Media Access Control (MAC) addresses AND the layer 3 TCP/IP addresses.

ntop users can use a 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 interactive mode, it displays the network status on the user’s terminal. In Web mode, it acts as a web server, creating a HTML dump of the network status. It sports a NetFlow/sFlow emitter/collector, a HTTP-based client interface for creating ntop-centric monitoring applications, and RRD for persistently storing traffic statistics.

Features include:

  • Sort network traffic according to many protocols including IPv4, IPv6, IPX, DecNet, AppleTalk, Netbios, OSI, DLC, (R)ARP, TCP/UDO, Fibre Channel, and more.
  • Show network traffic sorted according to various criteria.
  • Display traffic statistics.
  • Traffic statistics are saved into RRD databases for long-run traffic analysis.
  • Identify the identity (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 (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).
  • Internet Domain, AS (Autonomous Systems), VLAN (Virtual LAN) Statistics.
  • Produce RMON-like network traffic statistics.
  • Multithread and MP (MultiProcessor) support.
  • Advanced ‘per user’ HTTP password protection with encrypted passwords.
  • Python lightweight API for extending ntop via scripts.
  • HTTPS (Secure HTTP via OpenSSL).
  • VoIP support (SIP, Cisco SCCP and Asterisk IAX).
  • NetFlow (including v5 and v9) and IPFIX support.
  • Passive remote host fingerprint (courtesy of ettercap).

Website: www.ntop.org
Support:
Developer: Luca Deri and contributors
License: GNU GPL v3

ntop

ntop is written in C. Learn C with our recommended free books and free tutorials.

Return to Console Based Network ‘top’ Tools Home Page


Popular series
Guide to LinuxNew to Linux? Read our Linux for Starters series. We start right at the basics and teach you everything you need to know to get started with Linux.
Free and Open Source SoftwareThe largest compilation of the best free and open source software in the universe. Each article is supplied with a legendary ratings chart helping you to make informed decisions.
ReviewsHundreds of in-depth reviews offering our unbiased and expert opinion on software. We offer helpful and impartial information.
Alternatives to Proprietary SoftwareReplace proprietary software with open source alternatives: Google, Microsoft, Apple, Adobe, IBM, Autodesk, Oracle, Atlassian, Corel, Cisco, Intuit, and SAS.
Linux Around The WorldLinux Around The World showcases events and usergroups that are relevant to Linux enthusiasts.
AudioSurveys popular streaming services from a Linux perspective: Amazon Music Unlimited, Myuzi, Spotify, Deezer, Tidal.
Saving Money with LinuxSaving Money with Linux looks at how you can reduce your energy bills running Linux.
System ToolsEssential Linux system tools focuses on small, indispensable utilities, useful for system administrators as well as regular users.
ProductivityLinux utilities to maximise your productivity. Small, indispensable tools, useful for anyone running a Linux machine.
Home ComputersHome computers became commonplace in the 1980s. Emulate home computers including the Commodore 64, Amiga, Atari ST, ZX81, Amstrad CPC, and ZX Spectrum.
Now and ThenNow and Then examines how promising open source software fared over the years. It can be a bumpy ride.
Linux at HomeLinux at Home looks at a range of home activities where Linux can play its part, making the most of our time at home, keeping active and engaged.
Linux CandyLinux Candy reveals the lighter side of Linux. Have some fun and escape from the daily drudgery.
DockerGetting Started with Docker helps you master Docker, a set of platform as a service products that delivers software in packages called containers.
Android AppsBest Free Android Apps. We showcase free Android apps that are definitely worth downloading. There's a strict eligibility criteria for inclusion in this series.
Programming BooksThese best free books accelerate your learning of every programming language. Learn a new language today!
Programming TutorialsThese free tutorials offer the perfect tonic to our free programming books series.
Stars and StripesStars and Stripes is an occasional series looking at the impact of Linux in the USA.
Share this article

Share your Thoughts

This site uses Akismet to reduce spam. Learn how your comment data is processed.