Tuesday, July 24, 2012

Public Domain & Free Network Monitoring Tools

List of Public Domain and Free Network Monitoring Tools :

  • ANL Web100 based Network Configuration Tester tests the reliablity and operational status of your network link.
  • Application Monitoring
    • Alvias provides free monitoring of HTTP, TCP/IP port, ping, SMTP, POP# FTP, web page defacements from multiple networks around the world.
    • H.323 Beacon is a tool that can be used to measure, qualify and troubleshoot performance of H.323 Videoconference sessions both at the network and host levels (end-to-end)
    • MossHe (Monitoring with SSH Environment) is a simple, lightweight (both in size and system requirements) server monitoring package designed for secure and in-depth monitoring of a handful of typical/critical internet systems.
    • Munin monitoring tool surveys all your computers and remembers what it saw. It presents all the information in graphs through a web interface. Its emphasis is on plug and play capabilities. After completing a installation a high number of monitoring plugins will be playing with no more effort.
    • OpenSMART (Open Source|System Monitoring and Reporting Tool) is a tool to monitor applications with an agent per host. These agents report all there results to a central monitoring console for displaying and alerting. OpenSMART agents can fix some errors (like not running processes) on their own and OpenSMART knows about conditional monitoring (e.g. in a cluster: An application will be monitored only, when the file system is available on this cluster node, too).
    • Serio IT Service View is a free monitoring tool for servers and network devices. It includes standard plugins for monitoring Windows Servers, Linux Servers, Exchange servers, 'pingable' devices, log files, Oracle databases, web and web page content monitoring. It can respond to SNMP Traps, and includes its own mib compiler and scripting language for creating your own plugins. WMI integration allows rebooting of Windows servers, restarting services, etc. Realtime graphs and web page status pages included.
    • SpiceWorks is a browser-based desktop that lets you: inventory hardware, software and patches on your network; monitor your network for new software, low disk space, offline servers and rogue users; report on the information you need to manage your network.
    • System and Network Monitor (SNM) is a tool to monitor, graph and alert on computing devices and services. SNM runs on a Windows or Linux device on your network, 24 hours every day. The recorded data is accessed via a user friendly menu-driven web browser, e-mail alerts are raised if a user determined threshold fails. Sysmon is a network monitoring tool designed to provide high performance and accurate network monitoring of various application protocols. Currently supported protocols include SMTP, IMAP, HTTP, TCP, UDP, NNTP, and PING tests.
    • XYMON (used to be HobbitMon) monitors hosts, network services, and anything else you configure it to do via extensions. Hobbit will periodically generate requests to network services - http, ftp, smtp and so on - and record if the service is responding as expected. Through the use of agents installed on the servers, you can also monitor local disk utilisation, logfiles and processes.
  • aslookup tool searches the sequence of AS number specified with the parameter from IRR and indicates the first line of Description of AS Object.
  • arpwatch, if this link fails then you can FTP it from ftp://ftp.ee.lbl.gov/arpwatch.tar.Z (since this is the master repository it may also be a more recent version than the one above).
  • BGP
    • Argus monitors the Internet and discovers anomaly BGP updates caused by prefix hacking and adverises via the web site. See also the paper and about argus.
    • BGPlay a web based service, freely available to the community since 2004, which allows graphical inspection of interdomain routing evolution using public BGP data collected by www.routeviews.org and by www.ris.ripe.net.
    • BGPmon can monitor your prefixes and alert you in case of a 'interesting' path change. Recently this has received quite some attention. Specifically after the Youtube hijack and the demo given at defcon.
    • Cyclops a watchdog for prefix hijack and the Border Gateway Protocol.
    • iBGPlay based on the same visualization technology of BGPlay it is designed to inspect the interdomain routing evolution using private BGP data collected from ISP's routers. iBGPlay can show the outgoing traffic paths for all internet destinations and is especially suited for content providers. Subscription to iBGPlay is free.
    • LinkRank BGP dynamics visualization tool "LinkRank" also presented at Nanog 32 at Reston, VA (http://www.nanog.org/mtg-0410/lad.html).
  • FDBGet This little gadget will try to retrieve the forwarding table entries (Mac to interface number) of switches (layer 2 devices). This comes in handy when you want to know to which interface of a switch a particular NIC (e.g. computer) is attached to. Now suppports parameters for command line use.
  • Dig
  • D-ITG (Distributed Internet Traffic Generator) is a platform (collection of tools) capable of producing traffic (network, transport and application layer) and of accurately replicating appropriate stochastic processes for both IDT (Inter Departure Time) and PS (Packet Size) random variables (exponential, uniform, cauchy, normal, pareto, ...).
  • Dummmynet A FreeBSD system for emulating the effects of bandwidth limitations, propagation delays, bounded-size queues, and packet losses.
  • FingerPrinting
    • NetworkActive Port Scanner a network scanning tool that can perform UDP and TCP port scans and subnet scans, whois, DNS-dig, ping, protocol scans, and TCP/IP stack fingerprinting.
    • Nmap is a utility for port scanning of large networks, although it works fine for single hosts. OPENXTRA has a version (NMapWin) for Windows.
    • TBIT TCP Behavior Inference Tool
    • sscan performs probes against victim hosts to identify services which may potentially be vulnerable to exploitation.
  • Flow Monitoring
    • Argus the network Audit Record Generation and Utilization System. The Argus Open Project is focused on developing network activity audit strategies that can do real work for the network architect, administrator and network user. It is a Unix based Real Time Flow Monitor designed to track and report on the status and performance of all network transactions seen in a data network traffic stream.
    • ASDIC is a system for advanced firewall log and traffic analysis in large TCP/IP networks.
    • Cflowd is an experimental tool to collect data from Cisco's netflow export feature.
    • Nett::Flow is a Perl CPAN module to decode and encode NetFlow/IPFIX datagrams.
    • Netflow Monitor is tool with a nice web interface for processing and evaluating NetFlow Exports from CISCO routers.
    • NetraMet and other realtime flow meters designed for Internet accounting including NetraMet (a traffic meter), NeMac (a combined manager & meter_reader) and NIFTY (a traffic flow analyzer).
    • NFDUMP tools collect and process netflow data on the command line. They are part of the NfSen project. The goal of the design is to able to analyze netflow data from the past as well as to track interesting traffic patterns continuously. The amount of time back in the past is limited only by the disk space available for all the netflow data. The tools are optimized for speed for efficient filtering. The filter rules look familiar to the syntax of tcpdump (pcap like).
    • NfSen A graphical web based front end for the nfdump netflow tools that allows you to: dDisplay your netflow data: Flows, Packets and Bytes using RRD (Round Robin Database); navigate through the netflow data; process the netflow data within the specified time span; create history as well as continuous profiles; set alerts, based on various conditions; write your own plugins to process netflow data on a regular interval.
    • Periscope is a free network monitoring application inspired by the popular free-software project IP-Audit, written primarily in Common Lisp. It is designed to be an integral part of OSHEAN's Nautilus system. Periscope monitors, logs, and analyzes network activity using flow metrics, generating convenient and intuitive statistics. Periscope is an Argus client, capable of gathering flow data from local and remote Argus and Cisco NetFlow? servers.
    • Qosmet enables real-time passive QoS monitoring of IP application flows + also QoE evaluation for trained applications. Qosmet supports Windows, Linux, and Android and runs as a light-weight SW Service, being controllable from third party SW via a special protocol library.
  • FTP is the standard File Transfer Protocol. See also Commercial FTP tools.
    • Autobuf is an auto tuning-enabled FTP client and server. The client, a modification of the NcFTP Client, enables Auto Tuning to calculate optimal window sizes before files are transferred. The client is compatible with most other FTP servers. The server, a modification of the WuFtp FTP server, allows connecting clients to reset its buffer size dynamically by using a SITE option.
    • bbcp a secure peer to peer file copy program supporting large windows and multiple streams. See also the presentation and the PDF paper.
    • bbftp is designed to quickly transfer files across a wide area network. The package comprises of a server and clients. It also provides compression and secures the transmission of the username and password by using the cryptolib of the OpenSSL project.
    • BitTorrent an aggressive peer-to-peer file transfer protocol/implementation.
    • Firehose firehose uses multiple interfaces to stripe a bulk data transfer (it's geared towards files, the home-grown protocol includes sending a filename and the client requires a file) over multiple network interfaces.
    • GSIFTP is an ftp client and server with built in kerberos and GSI (globus) security, and also allows you to set the TCP buffers on both the client and server.
    • HPN-SSH provides a patch to remove the performance bottlenecks in OpenSSH.
    • SafeTP operates by installing a transparent proxy in the Windows networking stack which detects outgoing FTP connections from any Windows FTP client, and silently secures them using modern cryptographic techniques.
    • NcFTP has a popular free FTP client that adds support for firewalls, intelligent ls caching, background and scheduled processing, and Microsoft Windows.
    • RFT Reliable File Transfer Service is a service that allows byte streams to be transferred in a reliable manner. Reliability, in this context, means that problems of less than a certain, user defined magnitude are dealt with automatically. i.e. problems like dropped connections, machine reboots, temporary network outages, etc are dealt with automatically (usually via retry) until they either resume or meet some "ultimate failure" condition
    • vsFTP Re-engineered ftpd server with modern security and performance integrated. Accounts easily isolated using integrated chroot() based configurations, significant reporting facilities, performs well under high loads.
    • WU-FTPD is a popular FTP server from Washington University.
  • Host based network monitoring tools
    • Collectl is a lightweight tool that can monitor network and other traffic and provide a consistent, integrated view of what the system is doing. It can run as a daemon, maintaining a set of rolling logs and optionally can write them in a format plottable by gnuplot or loadable into Excel.
    • Etherape is a graphical network monitor for Unix modeled after etherman. Featuring link layer, ip and TCP modes, it displays network activity graphically. Hosts and links change in size with traffic. Color coded protocols display.
    • Ethergrouik is a free opensource easy-to-use software that enables you to monitor your network activity (like Etherape) for Windows.
    • Fing is a freeware tool for the discovery and scan of local and remote networks. Using adapting techniques, it can discover and scan large networks in short times. It runs on Windows, Linux and Mac OS X.
    • IPTraf is a console-based network statistics utility for Linux. It gathers a variety of figures such as TCP connection packet and byte counts, interface statistics and activity indicators, TCP/UDP traffic breakdowns, and LAN station packet and byte counts.
    • Ntop is a Unix tool that shows the network usage, similar to the popular top Unix command.
    • PacketTrap is a free network monitoring tool suite including; TFTP, ping scan, traceroute, and port scan.
    • Pktstat a real-time list of active connections seen on a network interface, and how much bandwidth is being used by what. Partially decodes HTTP and FTP protocols to show what filename is being transferred. X11 application names are also shown. Entries hang around on the screen for a few seconds so you can see what just happened. Also accepts filter expressions รก la tcpdump.
  • Internet Detective is a small Windows application that offers computer users easy access to the status and capabilities of their current network connection by providing information about advanced network capabilities, including connectivity to an Internet2 backbone network, an estimate of available bandwidth and multicast capabilities.
  • IP Address Management (IPAM)
    • NetDB is a Network Tracking Database providing a highly scalable program using SSH/telnet that keeps track of all ARP and mac-address tables across your routers and switches, with many features to ease network management. You can map devices to your switch ports, locate all ports configured for a VLAN and track all of this information over time.
    • Netdisco is an Open Source web-based network management tool. Designed for moderate to large networks, configuration information and connection data for network devices are retrieved by SNMP. With Netdisco you can locate the switch port of an end-user system by IP or MAC address. Data is stored using a SQL database for scalability and speed. It also provide optional use of the Cisco Discovery Protocol (CDP).
  • Lachesis a tool from Intel to monitor and report on response time and packet loss to "landmark" Internet sites. It is based on the publically available tool Imeter.
  • Mapping tools
    • GeoPlot is a light-weight java applet which allows users to create a geographical image of a data set.
    • Mapnet from NLANR/CAIDA is a tool for visualizing the infrastructure of multiple backbone providers simultaneously (Mapnet), and for updating and correcting information that may be invalid or out of date (Mapnet Update)
    • NetGeo is a database and collection of Perl scripts used to map IP addresses, domain names and AS numbers to geographical locations.
    • Network Weathermap provides useful tools for reporting/visualisation of a network's flows generally.
  • Monitoring Infrastructures (also see Comparison of Some Internet Active E2E Measurement Infrastructures)
    • Aware project is an effort to create a software framework to measure, monitor, and control computer system resources. Aware is intended to enable system administrators tune system variables, set monitoring/security alarms and build adaptive distributed systems. Aware modules may be linked into applications making them 'aware' and able to participate in the larger managed system.
    • Cheops is an Open Source Network User Interface designed to unify your network utilities.
    • EDDIE is a system monitoring, security and performance analysis agent developed entirely in Python. Its key features are portability, powerful configuration and ease of expansion.
    • GNMS is a GPL Network Management System, a graphical tool used to monitor state of network elements. Montoring can be done in multiple ways using service discovery, snmp, wmi and custom plugins, moreover syslog and snmp traps can be caught too.
    • JetMon is a client-server link monitoring tool for NOC operations, written in Java. The server pings a list of network devices, reporting the state to the clients.
    • Ganglia is a scalable distributed monitoring system for high-performance computing systems such as clusters and Grids.
    • GNetWatch is a mature free open source Java application that offers real-time graphical monitoring and analysis of network performance (using traffic generators and SNMP probes). The main advantage of GNetWatch is that it can monitor events (like throughput) that change for instance every second : the user can see a dynamic graphical window.
    • GroundWork Monitor Open Source combines open source projects like Nagios, Nmap, Sendpage, MySQL, etc with custom dashboards in one software package for monitoring a range of platforms - Linux, Unix, Windows - & network devices.
    • Hyperic HQ Open Source systems management software designed to monitor, analyze and control performance and availability of web infrastructure including hosts, virtualized guests, services, applications and networks through an easy to use portal and extensible plugin architecture.
    • Mon is a general-purpose resource monitoring system, which can be used to monitor network service availability, server problems, environmental conditions such as the temperature in a room, or any number of things.
    • Nagios (used to be NetSaint) is an open source host, service and network monitoring program. It is designed to run under Linux, although it should work under most other *NIX variants. It can run either as a normal process or as a daemon, intermittently running checks on various services that you specify. The actual service checks are performed by external "plugins" which return service information to Nagios. Several CGI programs are included with Nagios in order to allow you to view the current service status, history, etc. via a web browser.
    • NetMeter This application provides an integrated graphical interface for a set of tools that allows the measurement of QoS parameters over IPv4 and IPv6 networks. Network Performance Meter (netmeter) is an Tcl/Tk application which tries to solve these tasks in a flexible and modular way.
    • Network Performance Advisor is a single application which integrates the measuring, analyzing, and displaying of network performance statistics.
    • Network Status Notifier is a tool for monitoring and logging network status (links,routes, addresses, neighbours...) and executing scripts upon state changes.
    • NIMI
    • Osmius is a system, application and service monitoring tool with availability and SLA tracking.
    • OSSMON is a web-based monitoring package based on OSSWEB application framework. It supports SNMP monitoring as well as specific services like POP3, SMTP, Ping.
    • Performance Co-Pilot from SGI allows one to measure, visualize, record, and/or respond to the status, activity, and performance of systems, networks, applications, and servers. PCP is open source and runs on Windows, Mac OS X, and most Unix/Linux variants.
    • PingER End-to-end active measurement using ping to monitor end-to-end performance of Internet links.
    • Polymon is a free Windows/SQL based network/system monitoring solution that has flexible alerting capabilities as well as historical analysis of uptime and all counters and monitor statuses for a variety of monitors such as ping, snmp, Windows performance monitors, SQL, etc.
    • SCAMPI SCAMPI is a platform for passive monitoring. It can use several different hardware monitoring adapters (SCAMPI adapters developed in the project, DAG cards produced by Endace and regular NIC cards). It provides MAPI (Monitoring API) as a high-level abstraction of passive monitoring for easy creation of portable monitoring applications.
    • Scriptroute is a flexible network measurement and debugging system. Measurements are expressed as scripts that run as an ordinary user, and a priviledged daemon schedules and manages the packet exchange. The goal is to allow any user to connect to any server and execute any safe network measurement.
    • Simple Infrastructure Capacity Monitor (SICMD) is a tool to monitor, graph and alert the capacity of computing devices. SICM runs on a Windows or Linux device on your network, 24 hours every day. The recorded data is accessed via a user friendly menu-driven web browser. E-mail alerts are raised if a user determined number of queries fail.
    • skipole-monitor allows the user to input host IP addresses, it then pings these hosts every five minutes and displays their status via a built-in web server, on port 8000. It can optionally send email alerts if the hosts change status.
    • Total Network Monitor is an application which can be installed on a server and runs 24/7, constantly monitoring your network computers, servers, ports and services and alerting administrators about arising problems by e-mail, jabber, ICQ etc.
    • Zenoss is an integrated, easy-to-use IT infrastructure monitoring software product produced by the Open Source Community.
  • mrtg Multi Router Traffic Grapher. Also available from OPENXTRA.
  • mrtg-ping-probe is a ping probe for MRTG. It is used to monitor the round trip time and packet loss to networked devices. MRTG uses its output to generate graphs visualizing minimum and maximum round trip times or packet loss.
  • NetLogger tools to make it easy to instrument distributed applications and visualize the results.
  • NetNow a prototype tool providing realtime NAP & ISP backbone delay & packet loss performance statistics.
  • Network Security
    • CERT NetSA Security Suite The Network Situational Awareness (NetSA) group at CERT has developed and maintains a suite of open source tools for monitoring large-scale networks using flow data. These tools have grown out of the work of the AirCERT project, the SiLK project and the effort to integrate this work into a unified, standards-compliant flow collection and analysis platform.
  • netstat a built in Unix and Windows command line utility to display active network connections.
  • NetStat Live is a small, easy to use TCP/IP protocol monitor which can be used to see your exact throughput on both incoming and outgoing data.
  • NetTest Nettest is a secure, real-time network monitoring utility. The nettest framework is designed to incorporate existing and new network tests, and be run as a daemon or an interactive process. Requests for network tests are received via a SSL connection or the user interface and are authorized using an ACL list (in the future authorization using Akenti will also be supported).
  • Network Diagnostic Tool (NDT) a web100 Java applet developed to test the reliablity and operational status of your desktop computer and network connection.
  • NPAD (Network Path and Application Diagnosis) is designed to diagnose network performance problems in your end-system (the machine your browser is running on) or the network between it and your nearest NPAD server. For each diagnosed problem, the server prescribes corrective actions with instructions suitable for non-experts.
  • ns network simulator is a discrete event simulator targeted at networking research.
  • NIST Net allows a single Linux PC set up as a router to emulate a wide variety of network conditions.
  • NOCOL
  • nslookup
  • OWAMP One Way Active Measurement Program from Internet 2. provides one way delay measurements.
  • Packet capture/analysis tools. (see also commercial capture tools) Before using these tools on your site you should check with your network security people.
    • Analyzer is a fully configurable analyzer program. It was developed in Win32 environment. It can be used with both Windows 95/98 and Windows NT/2000 platforms. It is composed by three parts: a graphical interface, an analysis engine and a capture program.
    • Bro intrusion detection system contains a number of protocol analyzers that can munch on tcpdump traces (or live traffic, of course) and extract high-level application events from the reassembled TCP/UDP streams.
    • Crypto-PAn is a cyrptography-based sanitization tool for network trace owners to anonymize the IP addresses in their traces in a prefix-preserving manner.
    • Ethereal/Wireshark is a free network protocol analyzer for Unix and Windows (including Win2K). It allows you to examine data from live network or from a capture file on disk. Also Packetyzer provides a Packetyzer new Windows User Interface that will available under the terms of the GNU Public License. Also see the CACE Pilot that provides extra facilities to Wireshark.
    • Darkstat a packet sniffer that runs as a background process on a cable/DSL router, gathers all sorts of statistics about network usage, and serves them over HTTP.
    • flstats is program for extracting flow statistics from trace files created using the -w argument to tcpdump.
    • IPAudit captures packets in promiscuous mode and is often used for intrusions detection.
    • Jnettop Jnettop is a traffic visualiser, which captures traffic going through the host it is running from and displays streams sorted by bandwidth they use.
    • Justsniffer is a tcp packet sniffer. It captures reassembles and reorders TCP packets, performs IP packet defragmentation and displays the tcp flow and trace timings. It is useful for logging network traffic in a 'standard' (web server like) or in a customized way. It can log http response time, useful for tracking network services performances (e.g. web server, application server, etc.) .
    • Microsoft Network Monitor is a free protocol analyzer for Windows. It lets you capture and view live network data and view traces in .CAP, .PCAP, and .ETL file formats. It is capable of analyzing hundreds of protocols including Windows and SQL protocols as described from MSDN. Parsers are updated regularly in the open source on CodePlex. There are also a variety of open source analysis add-ons. More information can be found at the tool's blog.
    • Natas is an opensource windows 2000 network sniffer.
    • NetworkMiner is a passive network sniffer/packet capturing tool for Windows. NetworkMiner can detect OS's, hostnames, open ports, sessions and extract files without putting traffic on the network. NetworkMiner can also parse PCAP files for offline forensic analysis
    • PasTmon is a passive network application response time monitor utilising packet capture (via libpcap), tracking sessions maintaining transaction state and collecting metrics of server/network response times, segment size negotiation and TCP window size advertisements.
    • Plab is a software platform for packet capture and analysis. It is capable to extract, either from live traffic or from file traces, Inter Packet Times (IPT) and Packet Sizes (PS) inside conversations between couples of hosts. Plab runs under Linux and FreeBSD. It tries to use as few processing resources as possible and it is capable of analyzing traffic traces of hundreds millions packets associated to millions of conversations.
    • sniffit,
    • Snoop is similar to tcpdump and is bundled with the Sun/Solaris Unix operating system.
    • Snuffle is a measurement tool for capturing the protocol messages, internal protocol states and to measure implementation performance on networking nodes. Snuffle consists of a set of modules placed in the kernel, device driver and user space. Currently measuring probes for UDP, IP and IEEE 802.11b MAC are implemented.
    • TansuTCP (TT) is a TCP trace utility which listens on a local port and then forwards tcp packets to another server. You can see and save binary / text data to a file or you can load binary data from a file.
    • Tcpdpriv is a program for eliminating confidential information from packets collected on a network interface (or, from trace files created using the -w argument to tcpdump).
    • tcpdump. There is also a version for Windows 9x, NT & 2000. tcpillust takes tcpdump file(s) specified at the command line and draws pictures like figures in the ``TCP/IP Illustrated'' series. You can see sample screen images of tcpillust or screen guide at http://www.jp.nishida.org/tcpillust/index.html.
    • TCPurify is a packet sniffer/capture program similar to tcpdump, but with much reduced functionality. What sets TCPurify apart from other, similar programs is its focus on privacy. TCPurify is designed from the ground up to protect the privacy of users on the sniffed network as much as possible.
    • TCPshow is a Unix based program that parses the output file of TCPdump into human readable text.
    • Tcptrace is a TCP dump file analysis tool written by Shawn Ostermann at Ohio University.
    • trafd is a traffic accounting daemon for Linux and FreeBSD, built on top of libpcap, with accompanying tools to manage its data.
    • trafshow continuously displays information regarding packet traffic on the configured network interface that match the boolean expression.
    • Tstat TCP statistic and analysis tool (Unix/Linux based) - allows collecting network performance indexes from passive traffic analysis (i.e. packet traces), at both network (IP) layer, and at transport (TCP/UDP/RTP/RTCP) layer. It can be used to persistently monitor links, thanks to the integration with the RRD database.
    • WinPcap is an architecture for packet capture and network analysis for the Win32 platforms, based on the model of BPF and libpcap for UNIX. See also libcap for windows and libpcap for Unix.
  • Path Characterization & Bandwidth Estimation
    • ABwE Available Bandwidth Estimator.
    • Bandwidth Estimation Tools a compendium of tools maintained by Sally Floyd.
    • Bing is a point-to-point bandwidth measurement tool (hence the 'b'), based on ping. You can download it from here
    • Bprobe & cprobe provide measurement of bottleneck and congestion bandwidth using ping.
    • Clink is a tool for estimating Internet link characteristics.
    • Nettimer is a project to do end-to-end network performance measurement. It can listen passively to existing network traffic or actively probe the network
    • MTUPath discovers one-way path MTU to a host(IPv4 and IPv6)
    • Pathchar is a tool to infer the characteristics of Internet paths. There are some usage notes from CAIDA. There is also a SIGCOMM '99 paper on Using pathchar to estimate Inernet link characteristics by Allen Downey.
    • PathChirp
    • Pathload measures the available bandwidth of a link.
    • Pathneck is an active probing tool that can detect bottleneck location of network path. It only needs single end control, and has relatively small probing overhead (33.6KB for one probing in the default setting).
    • Pathprobe is a MIB tool that uses TCP and web100 to probe and characterize the path between two hosts. The goal of this tool is to run hop-by-hop tests to determine if the paths along the way are capable of supporting the desired end-to-end target bandwidth between the sender and receiver.
    • Pathrate measures end-to-end capacity
    • Pchar an independent implementation of Van Jacobsens pathchar with more intelligible output. Available for FreeBSD, Solaris, Linux, IRIX
    • Pipechar a tool for reporting dynamic network characteristics in particular the bottleneck bandwidth.
    • STAB short for spatio-temporal available bandwidth estimator, locate congested links on an end-to-end network path.
  • Ping
    • arping is an ARP level ping utility. It's good for finding out if an IP is taken before you have routing to that subnet. It can also ping MAC addresses directly. It is pre-installed on some Linux installations, but requires sudo priviledges.
    • fping is similar to ping but is optimized to ping a large number of hosts in parallel. You may be able to download from here.
    • Fpinger Visualizes your computer network as an animated screen that lets you perform administration functions, monitoring, pinging, scanning, exporting, looking for software and hardware over the network.
    • FREEping will ping all your 2003-XP-2000-NT servers (or any other IP address) in free-definable intervals. FREEping will send you a popup when one of the 2003-XP-2000-NT servers stops responding
    • Just-ping pings from 8 locations worldwide to a host you select.
    • MTR (Matt's traceroute) combines the functionality of the 'traceroute' and 'ping' programs in a single network diagnostic tool.
    • MultiPing Grapher MultiPing Grapher is a further development of Perfping with the ability to graph up to 10 different ICMP results. Includes logging and average calculation.
    • pathping is built into Windows 2000, it pings all nodes along a route.
    • Perfping a tool for testing availability, response times and performance using ICMP. Writes data to a text file for later interpretation with e.g. Excel. Allows you to change IP address, ICMP timeout and data size during runtime. Comes with a nice little graph for realtime testing.
    • Ping 'Classic' and the Nikhef Ping variant and its man page.
    • Pingroute.pl is a simple Perl script to ping all nodes along a traceroute and provide min, max, avg response time, plus packet loss analysis for 100 and 1400 byte packets. The source is freely available for SunOS, Solaris, Linux, AIX and Digital OSF1.
    • TCP based pings use TCP to figure out the Round Trip Time (RTT)
      • Synack measures the Round Trip Time to establish a TCP session using the SYN request and SYN/ACK response, allows specification of the TCP port.
      • Tping also also can ping more than one host at a time.
    • Traceping measures the packet loss to nodes along a route.
    • TRIUMF's Visual Ping provides a Web page that the user can make ping transfer rate measurements between the Web server and the browser.
    • hping2 is a network tool able to send custom ICMP/UDP/TCP packets and to display target replies like ping do with ICMP replies.
    • Zinger a small Perl program that pings the closest router on network and reports any loss of connection. When it detects a problem, it does two things. First, it announces the problem over the PC speakers. Then, it writes the time and date to a log file. When the connection comes back up, the program writes another entry in the log and announces the happy event over the speakers again.
  • Qcheck checks network response time, throughput, and streaming performance, by means of thin agents installed on hosts that are to be checked.
  • RANCID monitors a router's (or device's) configuration, including software and hardware (cards, serial numbers, etc), using CVS. Rancid logs into each of the devices in a router table file, runs various commands, chomps the output, and emails any differences ( sample) from the previous collection to a mail list.
  • Rider measures available bandwidth, latency, and streaming performance (including noticing consecutive lost packets -- a key measure for VoIP) using lightweight performance agents that include a built-in web server. Using a web browser for a GUI provides many extra useful features, such as the ability to save and print results, and the ability to bookmark tests (and even make a page of tests for your intranet.)
  • RRDtool (Round Robin Database tool) is a system to store and display time-series data.
    • Cacti is a complete network graphing solution designed to harness the power of RRDTool's data storage and graphing functionality.
    • Cricket is a high performance, flexible system for monitoring trends in time-series data. The collector runs from cron every 5 minutes (by default), and stores data into a file-based database managed by the RRD Tool. Later, when you want to check on the data you have collected, you can use a web-based interface to view graphs of the data.
    • ElvinRRD is a tool to provide a mechanism for transporting data across a network and storing it in RRD databases. ElvinRRD is written entirely in Python and works with (and requires) both Elvin and RRDtool. Any Elvin producer (client) can send data for ElvinRRD to store (e.g., EDDIE-Tool); and any RRD-aware software can process the resulting RRD databases (e.g., Cricket, Cacti).
    • Host Grapher II is a light program that uses RRD to draw graphics of Hosts for Network, Processes, CPU, Memory etc. Writing addicional plugins is quite simple. Works on all major UNIX platforms and on win32.
    • NetMRG is a tool for network monitoring, reporting, and graphing. Based on RRDTOOL, NetMRG is capable of creating graphs of any parameter of your network.
    • NMIS Network Management Information System is an SNMP polling and statistics viewer front-end to Tobi Oetiker's RRDTool.
    • Orca is a tool useful for plotting arbitrary data from text files onto a directory on a Web server.
    • remstats Remstats is a system of programs to: gather data from servers and routers, store and maintain the data for long periods, produce graphs and web-pages tieing them together, and monitor the data for anomalous behavious and issue alerts. This software is a pretty good hack to wrap around rrdtool as collector and presenter, easy to set up with not to much prerequesits. It only needs a some perlmodules and perl. Its under GPL and is able to maintain and monitor big environments.
    • SmokePing measures latency and packet loss in your network. Uses RRDtool to maintain a longterm datastore and to draw pretty graphs giving up to the minute information on the state of each network connection.
    • Torrus is designed to be the universal data series processing framework. Its has a scalable hierarchical design, with an application-independent core, and highly customizable architecture. Suitable for small installations and for big enterprise or carrier networks. Although most of our users deploy Torrus for SNMP monitoring, it might be useful for data series of any nature. Tobi Oetiker's RRDtool is used for data storage.
  • RouteViews is a tool for Internet operators to obtain real-time information about the global routing system from the perspectives of several different backbones and locations around the Internet.
  • SNMP:
      Analyse It is a shareware device poller that produces graphical performance reports for devices. You use it for trend analysis. The reports are in HTTP format for global organization view ability. Enables pro active network availability, performance, reliability and utilization reporting.
    • CMU SNMP or for a Perl5 extension module
    • EzMgt MIB Browser is a free tool that includes a MIB Editor, SNMP Query View and SNMP Tracer View.
    • Interface Traffic Indicator Interface Traffic Indicator, a graph utility to measure incoming and outgoing traffic on an interface in bits/sec, bytes/sec or utilization. Works on all SNMP-capable devices (computers, NICs, switches, routers, etc.) with adjustable poll interval down to three seconds. You can use this program in a professional network environment to monitor selected network interfaces (even backplane ports if the device provides the information) or you can monitor your home network or cable/modem/ISDN connection to the internet.
    • Mibbrowser Mibbrowser is a tool that retrieves all MIB data (OIDs and values) from SNMP-capable network devices. It can be used to find out what kind of MIB data is available from a device.
    • STC is a free command line tool to get and compare, side by side, SNMP tables entries from different computers. The output is always in XML format which is by default associated with a XSL script. So it can be processed later or immediately viewed with a WEB browser.
    • Tricklet man pages and code
    • UCD SNMP public domain tools
  • SolarWinds Free Tools provides many free tools for everydays tasks performed by network professionals. Includes uploading/downloading executabe images to network devices, IP address tracking, syslog server, monitoring of some applications, netflow etc.
  • Spong Son of Pong (spong) is a simple system monitoring package, that will monitor system attributes and network services on a variety of machines. It will gather status reports and contact staff if there are problems. It will also summarize the information and display it via a web interface
  • Sting end-to-end active monitoring tool that estimates one way loss through careful manipulation and observation of TCP behavior.
  • TCPtune a TCP stack tuner for Windows
  • telnet
  • Thruput tools (also see the FTP tools):
    • bulk is achievable performance measurement tool (iperf-like), which allows real-time monitoring of any socket options and their members, particularly TCP_INFO option, which provides useful clues for performance debugging. You can monitor rtt, cwnd, ssthresh, retransmits, etc. down to per sent segment, if you wish. The tool does not require root access or any kernel patch (even though it works with an accompanying AIMD patch for per-socket AIMD tuning). Download
    • gen_send/gen_recv a simple UDP trafic generator.
    • IPerf is a tool for measuring maximum TCP and UDP bandwidth, reminiscent of tools such as ttcp. It has been written to overcome the shortcomings of those aging tools. Jperf is a Java implementation.
    • The MGEN toolset provides programs for sourcing/sinking real-time multicast/unicast UDP/IP traffic flows.
    • netperf maintained by HP, is a general measure of performance of a network. Provides a measure of latency between request and response of generic transactions across a TCP/IP network.
    • Nuttcp is a tool for measuring TCP achievable throughput.
    • RUDE stands for Real-time UDP Data Emitter and CRUDE for Collector for RUDE. RUDE is a small and flexible program that generates traffic to the network, which can be received and logged on the other side of the network with the CRUDE.
    • Tcpspray sends data to either the discard or echo TCP service on the specified host and prints the average throughput.
    • thrulay measures achievable UDP and TCP single stream throughputs (currently only supports Linux) also provides RTT estimates.
    • TReno a tool to function as a basis for a formal bulk transfer metric for the Internet.
    • ttcp
    • UDPmon This is a set of tools using UDP and TCP to give estimates of the request-response latency and bandwidth found in the route between the two end nodes. See also Some Tools used for Testing Network Behaviour.
  • Traceroute (also see the Traceroute Servers web site, and commercial traceroute products)
    • man pages, where to get it, the traceroute NIKHEF variant and traceroute servers.
    • Gtrace is a traceroute visualization tool that uses a combination of methods to either determine or guess at the physical location of a node in the traceroute path. It is flexible enough to support addition of new databases, heuristics to map IP addresses to physical location and maps.
    • mturoute is a small Windows tool to determine the path MTU between you and a specified host. In traceroute mode it will additionally show you the mtu at every hop between you and the specified host.
    • NeoTrace provides graphical traceroute information.
    • pathping a Windows NT utility to do a traceroute and then measure to each node along the route.
    • Prtraceroute is a version of traceroute, from the RIPE Internet Routing Registry toolset, that presents routing policy information together with the real time packet trace obtained from traceroute. It adds AS information to the normal traceroute output, making use of Routing Registry (RR) database information.
    • Scamper is a program that conducts traceroute to large numbers of IPv4 and IPv6 addresses in parallel to fill a specified packets-per-second rate.
    • TCPtraceroute uses TCP to a port at the end node to do a traceroute.
    • The tracepath for Linux is like traceroute but does not need superuser and has no fancy options. It does discover the PMTU along the route.
    • Traceroute-nanog has additional features like AS lookup, TOS support, microsecond timestamps, path MTU discovery, parallel probing and others.
    • VisualRoute a GUI based traceroute for Windows.
  • Zabbix is software for application and network monitoring. Zabbix supports both polling and trapping techniques to collect data from monitored hosts. Flexible notification mechanism allows easy and quckly configure email notifications for pre-defined events.
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