Get a License

Author: Alfredo Cardigliano

  • Home
  • Articles by: Alfredo Cardigliano
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

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 …
PF_RING

Accelerating Suricata with PF_RING DNA
Below you can find an excerpt of the “Suricata (and the grand slam of) Open Source IDPS” article written by our friend Peter Manev (Suricata core team) describing how to install and configure PF_RING, DNA and Suricata. The original blog entries can be found at Part One – PF_RING and Part Two – DNA. ————- Part One – PF_RING If you have pf_ring already installed, you might want to do: sudo rmmod pf_ring If you are not sure if you have pf_ring installed , you can do: sudo modinfo pf_ring …
PF_RING

PF_RING 5.6.0 Released
This is to announce the release of PF_RING 5.6.0. We recommend all users to install this release as we have fixed a couple of critical bugs. Changelog: PF_RING Kernel module Fixed bug that prevented the PF_RING cluster to work properly with specific traffic Documentation User’s guide translated to russian (courtesy of ridervka@yandex.ru) Libzero Fixed bug that caused the DNA bouncer to process the correct packet Examples pfwrite Added support for the microcloud so that for GTP traffic it is possible to dump traffic of specific IMSI phone Added support for …
PF_RING

PF_RING 5.5.3 Released
Today we have released a new maintenance version of PF_RING. We suggest all users to update if possible. PF_RING Kernel module – Support for injecting packets to the stack – Added ability to balance tunneled/fragmented packets with the cluster – Improved init.d script – Packet len fix with GSO enabled, caplen fix with multiple clusters – Bug fixes for race condition with rss rehash, memory corruption, transparent mode and tx capture, kernels >= 3.7. Drivers – Added PF_RING-aware driver for Chelsio cards (cxgb3-2.0.0.1) – New release for PF_RING-aware igb (igb-4.1.2) …
n2disk

Filtering n2disk-captured Packets and Replaying them at 10 Gbit using the nBox
The nBox is not just a no-cost web GUI for ntop products, but it’s a totally new experience for dealing with pcap files. n2disk is able to index packets while capturing and then filter captured packets. Once you have filtered your favourite packets (based on a BPF filter and a time span) you can then download them to your PC or reproduce them at line rate (or at any speed you like). Even BPF filters are simplified with the nBox thanks to the ability to drag and drop filtering expressions …
Announce

Introducing nBox 2.0 (aka how to use/configure ntop apps using a web GUI)
Years ago we decided to create the nBox appliance as turn-key solution for those that were not fans of the command line. Then we decided to rewrite the nBox GUI to make it simpler, more modern, and usable by all ntop users, to configure ntop, nProbe, n2disk, PF_RING and DNA.   In essence we have created a new web interface that can simplify your configurations, assist with complex things such as core affinity or DNA configuration, and let you focus on ntop applications rather than on their configuration. You can download …
PF_RING

PF_RING 5.5.2 Released
Changelog Fix for corrupted VLAN tagged packets Userspace bpf support (when using dna) PF_RING-aware igb default moved to 4.0.17 Flow Control  rx/tx automatically disabled by the driver Added DAQ drivers into RPM (http://packages.ntop.org) New pfring_open() flag PF_RING_DNA_FIXED_RSS_Q_0 to send all traffic to queue 0 and select other queues with hw filters (DNA cards with hw filtering only) Added check for modern libc versions New pfdnacluster_mt_rss_frwd sample app (packet forwarding using libzero dna cluster for rx/balancing and standard dna with zero-copy on rss queues for tx) Added ability to create a …
PF_RING

PF_RING 5.5.1 Released
ChangeLog Updated PF_RING-aware ixgbe driver (3.11.33). Update PF_RING-aware igb (4.0.17). Fixed bug that was causing ixgbe driver not to disable interrupts. This was causing a high load on the core handling the interrupts for ixgbe-based card. libzero: various hugepages improvements and bug fixes. Added ability to specify PF_RING_RX_PACKET_BOUNCE in pfring_open(). Fixed minor PF_RING memory leak. Various improvements to support of hardware timestamp on Silicom Intel-based 10 Gbit adapters. DNA Bouncer: added direction to pfring_dna_bouncer_decision_func callback (useful in bidirectional mode). DNA Cluster: added dna_cluster_set_hugepages_mountpoint() to manually select the hugepages mount point when several …
PF_RING

PF_RING 5.5.0 Released
New libzero features DNA Cluster: number of per-consumer rx/tx queue slots and number of additional buffers can be configured via dna_cluster_low_level_settings() hugepages support (pfdnacluster_master/pfdnacluster_multithread -u option) New PF_RING-aware libpcap features added PF_RING_ACTIVE_POLL environmental variable to enable active polling when defined to 1 enable rehash rss setting env var PF_RING_RSS_REHASH=1 cluster type selectable via env vars: PCAP_PF_RING_USE_CLUSTER_PER_FLOW PCAP_PF_RING_USE_CLUSTER_PER_FLOW_2_TUPLE PCAP_PF_RING_USE_CLUSTER_PER_FLOW_4_TUPLE PCAP_PF_RING_USE_CLUSTER_PER_FLOW_TCP_5_TUPLE PCAP_PF_RING_USE_CLUSTER_PER_FLOW_5_TUPLE New PF_RING-aware drivers Updated Intel drivers to make them compatible with newer kernels New PF_RING library features new pfring_open() flag PF_RING_HW_TIMESTAMP for enabling hw timestamp New PF_RING kernel module features …
n2disk

Using n2disk for 10 Gbit line-rate packet-to-disk
Packet-to-disk is the ability to dump network packets to disk. This activity is important for implementing a sort of “network time machine” so that when something unexpected happens, you have the ability to access the raw packets and thus inspect the cause of the problems. Implementing efficient packet-to-disk requires high-speed packet capture, speedy disks, and efficient packet dump software. We started to work on this field, a few years ago when creating a packet-to-disk application for 1 Gbit networks, named n2disk. Today we are introducing the second generation of n2disk …

High-performance network traffic monitoring and analysis tools.

Explore
Newsletter
Subscribe