A blacklist is an access control mechanism which denies access to selected network resources to peers belonging to a curated list. Blacklists often represent the first line of defence for many networks as they can reduce internal hosts’ risk of establishing communications with peers with a bad reputation. Many companies use blacklists for detecting malicious […]
How nDPI Identifies Fully Encrypted Protocols
In the paper How the Great Firewall of China Detects and Blocks Fully Encrypted Traffic it is described a technique used in censorship to identify and block fully encrypted protocols. This technique, limited to TCP flows, uses a few techniques that are applied on the first TCP packet with payload, making it fast and convenient […]
Understanding Timeseries Throughput Calculation
ntopng creates timeseries for traffic by periodically (e.g. every minute) writing into RRD/Influx the traffic volume observed. Below you can see an example. Traffic is used to keep track of the data volume exchanged. Over time timeseries are aggregated (roll-up) to save space, meaning for instance that 60 minute observations are used to compute a […]
HowTo Trigger an Alert When Contacting a Website/IP with ntopng
ntopng has native blacklist support that enables generation of alerts when malware sites are contacted. You can enable/disable the list of active blacklist by accessing the blacklist page from the preferences menu of the left sidebar and also configure the list properties such as refresh rate as well enable/disable them. Now suppose you want to […]
ntopConf 2023 (25 years of ntop) Registration is Now Open
This is to announce that the registration for the ntop Conference 2023, 25 years since the first release of ntop, is now open. Similar to past conferences, this event is divided into two days: the first day will be allocated for training on ntop products, the second day for the main conference and workshop. You […]
Deploying nEdge with Multiple (Virtual) LANs (and WANs)
Exactly 3 years elapsed from the introduction of nEdge (ntopng Edge), and despite the fact we haven’t posted much about it in our blog, this tool continued to grow, many features have been added over time, and we see that every time new users have the chance to try it, they are amazed about the capabilities it provides. […]
Using Traffic Rules To Supervise Network Traffic
The Problem Let’s assume that you have a Network where local hosts generate a constant amount of traffic. How do you find if they are misbehaving? It happens that some local host starts behaving strangely, by having an abnormal amount of traffic (sent or received) with respect to their recent past: how can you spot […]
ntop June 2023 Webinar Recording
Those who missed our June 2023 webinar can watch the webinar recording as well glance through the presentation slides.
Monitoring Microsoft Teams Performance and Video/Call Quality
Months ago we have talked how ntopng identifies ad monitors Zoom calls quality. Today we show how call monitoring has been now seamlessly extended to Microsoft Teams. Thanks to nDPI, ntopng is now able to detect Teams calls and to label them according to the stream type: Video Audio Screen Sharing. For each call it […]
Register for ntop June 2023 Webinar: June 20th 3PM CET / 9 AM EST
This is to invite you to the latest ntop webinar before the summer break. The major webinar topic will include n2disk smart packet recorder Latest OT/SCADA Developments; IEC 104 and ModbusTCP Suricata/Zeek IDS Acceleration at 40/100 Gbit New ntopng charts and tables Traffic Rules Inactive Host Monitoring and ,,,, You can register for the webinar […]