In this blog post we want to shave our experience squeezing ntopng memory usage to fit into small OT monitoring devices manufactured by our partner Endian. Just to give you an idea of the work we did look at these two images taken on the same network at the same time of the day, before […]
HowTo Analyse NetFlow/IPFIX/sFlow pcap Traces
Dumping sFlow/NetFlow/IPFIX flows in pcap format can be very useful for troubleshooting or for creating a compact traffic dump. For instance you can dump flow traffic with n2disk (wireshark, or tcpdump) and store them in pcap format, and eventually share them with a shared disk or sent via email. Flows are usually analysed live with […]
ipt_geofence: Protecting Networks using Geofencing, Blocklists and Service Analysis
Last week the ntop team has organised the network devroom at FOSDEM 2024, that took place in Brussels on Feb 2-3. During the devroom we have presented one tool named ipt_geofence that we have created for protecting our network infrastructure and generate blacklists that can be used with ntop tools (this task is still ongoing). […]
Introducing ntopng Customised Reports
In ntopng 6.0 Dashboard and Traffic Reports have been completely redesigned and rewritten from scratch with a new, flexible engine which is template-based. In a previous webinar we demonstrated how cute and powerful the new engine is, with the ability to automatically generate periodic reports, and with the promise of releasing a graphical editor for customising […]
HowTo Monitor SNMP Interfaces Utilisation and Congestion Rate
Recently, we added the ability in ntopng to monitor link utilisation using NetFlow/IPFIX. In this post, we want to show you how we further improved those functionalities by leveraging SNMP to monitor the status of many devices (interfaces) simply. SNMP is a well-known protocol used for monitoring network devices, and ntopng uses it to poll […]
How Sampling and Throughput Calculation Works: NetFlow/IPFIX vs sFlow vs Packets
ntop tools are able to collect various type of flows NetFlow/IPFIX (including dialects such as J-Flow, NetStream) and sFlow/NetFlowLite, this in addition to packet capture/processing. We have decided to seamlessly handle all these formats so that the user does not have to know the inner details of them. so what you do is the usual […]
Using ntop in Education: South Panola School District
ntop tools are heavily used in education and we’re glad to share a gust post that described the lessons learnt deploying our tools in a a public school district of Mississippi. Enjoy ! South Panola School District’s (SPSD) network continues to evolve to better serve the needs of its students and staff. Upon employment at […]
Short 1-2Q24 Roadmap: ntop Cloud, Towards 200 Gbit, Cybersecurity, Low-end nBox
Happy new year everyone! Thos who followed our November webinar know already that we’re working at new features and improvements in our tools. Below you can find a short list of features we plan to implement by the end of spring: ntop cloud. This is the major activity where we’re involved. As already said, for […]
HowTo Monitor Network Interface Usage with NetFlow/IPFIX
SNMP is the de-facto protocol for monitoring network devices. Using it, it is possible to monitor “how much” a link is used. What is missing is “how” a link is used. Namely if my Internet link is full, what is the device, protocol, application that is using it? ntopng was created to answer this question […]
Securing ClickHouse and MySQL Flow Storage
ntopng stores flows data in various databases including MySQL, Elastic and ClickHouse that is the database storage that we have selected as it outpaces the others in terms of speed and reduced disk space. ClickHouse is a columnar database and while it is very fast during data access, it is optimised for batch data insertion. […]