ntop tools range from packet capture, traffic analysis and processing, and sometimes it is not easy to keep up on product updates as well master all the tools. This has been the driving force for organising ntop professional training: . This is to announce that in May we have scheduled the next ntop Professional Training […]
How to Send ntopng Alerts to PagerDuty
PagerDuty is a popular incident-response platform that allows problem notifications to be delivered in a flexible way to the correct team member. We have integrated it in ntopng Enterprise and this post shows you howto configure it. First of all you need to create a PagerDuty account and select a plan (there is a free […]
How nDPI Improved Bloom Filters Implementation
A Bloom filter is. probabilistic data-structure used to test whether an element is present in a set. Blooms are affected by false positives, meaning that when a bloom returns true it does not mean that the searched element is part of the set but that it is “likely” to be part of the set. nDPI […]
How Effective Are IP Blacklists When Used For Detecting Malicious Activities?
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 […]
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 […]