n2disk

Visualising n2disk Captured Traffic using CloudShark
Introduction ntop users are familiar with n2disk and the nBox web interface that ease its use. As you know, the nBox includes a small web-based tool that allows you to preview pcap contents.  This tool is good for having an idea of what a pcap contains but it not a fully fledged application. On the other hand CloudShark is the leading application for analysing traffic traces, and thus we have decided to leverage on it for offering the cheapest and most powerful solution for traffic-to-disk and pcap visualisation on the cloud. …
Announce

ntop at SHARKFEST’14
The ntop core team will be at the SHARKFEST in June, the annual 4-day conference, focused on sharing knowledge, experience and best practices among Wireshark developers and users. Luca Deri will be among the speakers talking about “Monitoring Mobile Network Traffic (3G/LTE)“. Join us June 16th through June 20th at the Dominican University of California in San Rafael, CA! …
n2disk

Introducing on-the-fly 10 Gbit pcap compression on n2disk
Compressing pcap produced by n2disk is a good idea for a few reasons: It allows disk space to be saved as compressed data takes less space on disk. It enables the creation of cheaper packet recorder appliances as with the same hardware you can save more data onto disk and thus in some problem domain you can double the capacity of your existing box. As n2disk leaves some space in CPU cycles (in particular when used on top of Napatech adapters) we have room to compress and index packets on-the-fly …
PF_RING

Not All Servers Are Alike (With PF_RING ZC/DNA) – Part 3
We have already discussed on the first and second part of this post some common issues that might be encountered while doing high-performance packet processing. Most of the problems are related to multi-CPU servers (NUMA) and memory configuration. We have spent a lot of time creating the nBox web-GUI that is not just a graphical interface, but it is a way to automatically configure ntop applications as well report common configuration issues. For those who want to live without it, we have some additional lessons learnt to share. Lesson 1: Make sure all …
PF_RING

Migrating from DNA/Libzero to PF_RING ZC
Since the introduction of PF_RING ZC (Zero Copy), we have received many inquiries about migrating from DNA/LibZero to ZC. Said that at the moment we do not plan to discontinue DNA/LibZero, we would like to summarise the differences and ease you the migration: In PF_RING 5.x (pre-ZC) there were two driver families: DNA-drivers and PF_RING-aware drivers. With the former you could operate at line-rate with DNA/LibZero, with the latter the speed was limited and you were not able to use the packets from LibZero. In ZC, there is one driver family …
PF_RING

Introducing PF_RING ZC (Zero Copy)
NOTE: The new PF_RING home is hereAfter almost 18 months of development, we are pleased to announce the release of PF_RING ZC (Zero Copy). Based on the lessons learnt with DNA and libzero, we have decided to redesign from scratch a new consistent zero-copy API that implements popular network patterns. The goal is to offer you a simple API, able to deliver line-rate performance (from 1 to multi-10 Gbit) to network application developers. We have hidden you all the internals and low-level details, in order to create a developer-centric API …
Announce

Accurate 10 Gbit Traffic Reply Using disk2n
n2disk is a software application that allows to dump traffic to disk at line rate (10 Gbit full duplex) with high-accurate timestamps. This both using networks cards featuring hardware timestamps and also with software timestamps. Most companies focus just on capture to disk, whereas we believe that it is also compulsory  to provide solutions for traffic replay by exploiting these high-accurate timestamps that have been saved on pcap files. This activity is quite challenging. Replying traffic with high-precision timestamps it is necessary for instance whenever we want to reproduce exactly the …
nProbe

Introducing nProbe Splunk App for (Free) Network and Application Monitoring
Splunk is a popular realtime data capture, aggregation, and data visualisation system. Designed initially for handling application logs, in its current version is available  with a free enterprise license can index up to 500 megabytes of data per day. We have decided to use Splunk to capture and index in realtime flows generated by nProbe, and in particular those that contain non-numerical information, such as HTTP URLs for instance. The versatile of splunk is such that it can be easily customised with a few mouse clicks, so that new reports, views …
Announce

Napatech and ntop will demonstrate 10 Gbps capture-to-disk at RSA and MWC
Napatech, the world’s leading supplier of network analysis adapters, and ntop, the renowned traffic monitoring software expert, today announced a collaboration focused on accelerating time to market for high-performance network management and security appliances. The first initiative is a 10 Gbps capture-to-disk solution that will be demonstrated at Mobile World Congress and RSA, February 24-28. Capture-to-disk is fast becoming a critical capability for appliances used in network management and security as well as real-time big data analytics, but it requires expertise to implement, especially for high-speed applications. Commercial-off-the-shelf (COTS) servers offer …
n2n

Using n2n with Amazon (AWS) EC2
Although we currently have no time to further develop n2n (we have put the project on hold until we have time to work at it again), this tool is still widely used. This article (courtesy of Stuart Buckell) shows how to use n2n to enable broadcast and multicast support on Amazon (AWS) EC2, which is required for certain enterprise applications and protocols. Enjoy! …
nProbe

How to Balance (Mobile) Traffic Across Applications Using PF_RING
Traffic monitoring requires packets to be received and processed in a coherent matter. Some people are lucky enough to get all interesting packet on a single interface, but this is unfortunately not a common scenario anymore: The use of network taps split one full-duplex interface into two half-duplex interfaces each receiving a direction of the traffic. Standby interfaces, require traffic monitoring apps to surveil two interfaces, where traffic flows only on one interface at time. Asymmetric traffic (i.e. all protocols similar to HTTP where the traffic in one direction is …
PF_RING

Learning the PF_RING API
Since the initial version, PF_RING has supported the pcap API that is familiar to many developers. This has allowed people to seamlessly port existing apps on top of PF_RING, simply relinking their apps using the PF_RING-aware version of libpcap. Unfortunately the pcap API is able to exploit just a subset of the features available in the native PF_RING API as demonstrated by the various apps we have coded to show how to the native API works. In order to ease the development of new native PF_RING applications, we acknowledge it …

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