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IPTraf is an open source ncurses-based IP LAN monitor that generates various network statistics including TCP info, UDP counts, ICMP and OSPF information, LAN station packet, Ethernet load info, node stats, IP checksum errors, and others.

This program can be used to determine the type of traffic on your network, and what kind of service is the most heavily used on what machines, among others. IPTraf can be used to monitor the load on an IP network, the most used types of network services, the proceedings of TCP connections, and others. IPTraf was designed from the ground up to use the Linux PF_PACKET mechanism to reduce overhead.

 IPTraf 3.0.0

Free to download



Gerard Paul Java


System Requirements
Linux Kernel 2.2 or higher
glibc 2.1 or higher

Documentation, Mailing Lists, Monitoring network traffic with iptraf and rrdtool

Selected Reviews:

Features include:

  • Full-screen, menu-driven operation
  • Background operation
  • IP traffic monitor that shows information on the IP traffic passing over your network. Includes TCP flag information, packet and byte counts, ICMP details, OSPF packet types
  • All IP traffic can be filtered with a unified set of filter rules which makes it easier to define filters for for all IP traffic to or from a certain host or network without having to define three distinct filters
  • General and detailed interface statistics showing IP, TCP, UDP, ICMP, non-IP and other IP packet counts, IP checksum errors, interface activity, packet size counts
  • TCP and UDP service monitor showing counts of incoming and outgoing packets for common TCP and UDP application ports
  • LAN statistics module that discovers active hosts and shows statistics showing the data activity on them
  • TCP, UDP, and other protocol display filters, allowing you to view only certain types of traffic
  • Utilizes the built-in raw socket interface of the Linux kernel, allowing it to be used over a wide range of supported network cards
  • Supports the following protocols: IP, TCP, UDP, ICMP, IGMP, IGP, IGRP, OSPF, ARP, RARP, L2TP, IPSec Authentication, and IPSec Encrypted Payload
  • Supported interfaces: Local loopback, All Linux-supported Ethernet interfaces, All Linux-supported FDDI interfaces, SLIP, Asynchronous PPP, Synchronous PPP over ISDN, ISDN with Raw IP encapsulation, ISDN with Cisco HDLC encapsulation, Parallel Line IP, TUN, BRG
  • Force promiscuous mode - so that traffic which does not pass directly through the specified interface is also counted. Promiscuous mode is often used to diagnose network connectivity issues
  • Logging
  • Timers: TCP timeout, Logging interval, Screen update interval, TCP closed/idle persistence
  • Reverse DNS lookups

IPTraf in action

IPTraf in action

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Last Updated Sunday, May 31 2015 @ 03:42 PM EDT

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