ntop

What’s New in ntopng: Keep an Eye on Lateral Movements
Hello everybody! Welcome back to the weekly blog post of this serie used to update you with the latest ntopng features and graphical changes. Please let us know your feedback! Today we are going to talk about the Service Map. As you probably know, one of the most troublesome problems in a network, when it comes to security threats detection, is discovering Lateral Movements. Lateral Movements can be defined as network activities that an Attacker does when he gain access to a device in the victim’s Local Network, and starts …
ntopng

Deploying ntopng at Scale: Jessa Ziekenhuis
This is a report from one of our users from the field, who decided to use ntopng to monitor a large network. Many thanks to Bjorn for sharing this information with our community.   Our network Jessa Ziekenhuis is one of the biggest, non-academic, hospitals in Belgium. Spread over 4 campuses, we manage 3 data centres and about 90 data racks. Combined, this leads us to over 6,000 connected (and active) hosts ranging from laptops, desktops, MRIs, ultrasounds,… Challenges With hundreds of different specialised (medical) applications, (medical) devices, it’s hard …
ntopng

What’s New in ntopng: Host Traffic Analysis
Hello everybody! Welcome back to the weekly blog post of this serie used to update you with the latest ntopng features and graphical changes. Please let us know your feedback! Today we are going to talk about Host Traffic Analysis. When analyzing traffic generated by a host, one of the main metrics we are interested in protocol traffic. ntopng keeps many traffic counters for traffic a host generates/receives, including traffic per protocol (e.g. TCP), application protocol (e.g TLS), breed (e.g. Unsafe Traffic), etc. In order to enhance those information, we …
nProbe

Howto use Kafka (instead of ZMQ) For Reliable Flow Collection and IPC
Historically, we have used ZMQ for interconnecting nProbe to ntopng, as this is a fast and simple messaging system. However one of they key advantage of ZMQ of being broker-less is sometime a problem. In case of maintenance, traffic peaks, or unreliable communications, the ZMQ communication between nProbe and ntopng will drop flows with the result that some data will never reach ntopng. As Apache Kafka is the de-facto standard for messaging communications, we have decided to extend its support from flow egress in nProbe / nProbe Cento, to communication …
ntopng

What’s New in ntopng: Alert Severities
Hello everybody ! We are going to use this new blog-post serie to explain ntopng new features and graphic changes; let we know your feedback! Today we are going to talk about Alert Severities. In ntopng, Alert Severities, are really important because they are used to understand how severe a problem is. Unfortunately we noticed that there are too many alerts with high score and high severities, confusing ntopng users on which is a critical problem and which is not, independently from the network. For this reason we decided to …
ntop

ntop Professional Training: November 2022
ntop tools are continuously evolving and getting extended in order to take into account new requirements. Every new release adds many new features that needs to be mastered. In addition to this, new users demand professional training to quickly learn our tools and be productive in limited time. For this reason ntop offers professional training in addition to periodic webinars, video tutorials, and community support. This is to announce that the next ntop Professional Training will take place in November 2022. This ntop training mainly focus on ntopng, new features, …
Cybersecurity

Malware Traffic Analysis in ntopng
ntop users have started to use our tools for malware analysis as contrary to packet sniffers or text-based security tools, ntopng comes with a web interface that simplifies the analysis. For this reason we have recently: Added the ability to upload a pcap file to ntopng using the web GUI, so that you can analyze traffic traces without the need to transfer them to the ntopng host using SCP or similar protocols. Enhanced the list of nDPI flow risks (47 as of today) with the ability to detect webshells and …
Cybersecurity

Using Blacklists to Catch Malware Communications Using ntopng
A category list is a control mechanism used to label traffic according to a category. In nDPI, the traffic classification engine on top of which ntop applications are built, there are various categories including (but not limited to) mining malware advertisement file sharing video streaming A blacklist is a list of IP addresses or symbolic domain names, that is used to label malicious traffic. These lists are often computed using honeypots, that in essence are hosts or services deployed on a network (usually the Internet) that are easy to break-in …
ntop

Traffic Monitoring and Enforcement for ISPs and Service Providers
Last week we have talked at ITNOG6 where we presented a report of the lessons learnt while monitoring ISP and service providers networks. This work is the result of one year of activities carried on with some of our users who provided feedback and new ideas. In summary we concluded that cybersecurity is a hot topic for these users and that DDoS mitigation is not enough for keeping a network healthy, but that they need tools able to both collect flows and packets, and implement ETA (Encrypted Traffic Analysis) as …
ntopng

HowTo Use ntopng for Pcap Analysis
Many times traffic analysts receive pcap files containing some traffic to analyse. The usual steps for analysing the pcap file with ntopng have been for a long time: Save the pcap file to disk and upload it to the host where ntopng is running. Stop the ntopng service and restart it from shell as ‘ntopng -i uploaded_file.pcap’ Once the analysis is over, stop ntopng, delete the uploaded pcap, and restart ntopng as a service. These steps are too complex for many people, and do not ease the adoption of ntopng …
Announce

Introducing nTap: a Virtual Tap for Monitoring and Cybersecurity (including Wireshark, Suricata, Zeek, OpenvSwitch)
This is to announce a new product named nTap that implements a software tap, to be used in physical and virtual/containerised environments.   Using nTap with ntop applications nTap with Third Party Applications nTap allows you to capture and deliver packets using a secure and encrypted communication channel from remote hosts to a collector host where traffic is received and injected on a virtual interface. In essence nTap allows you to create a virtual interface from which you can receive packets originating from remote hosts. Thanks to this design, all …
nProbe

HowTo Implement Flow Relay, Replication and Fanout with nProbe
Sometimes flow (sFlow/NetFlow/IPFIX) collection can become a complicated activity when you need to: Collect, on your private network, flows originated by devices with a public IP. Migrate your infrastructure to nProbe/ntopng while sending flows to both nProbe and your legacy collector. Implementing all this is often an expensive exercise with non-ntop solutions, therefore in order to ease migration to ntop tools, we made available in the nProbe package a couple of tools that can implement typical activities such as flow relay, replication and fanout easily. Below you can learn how …

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