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  • SmokePing – Latency Measurement Tool

    SmokePing is a deluxe latency measurement tool. It can measure, store and display latency, latency distribution and packet loss. SmokePing uses RRDtool to maintain a longterm data-store and to draw pretty graphs, giving up to the minute information on the state of each network connection.

    Main Features of SmokePing are,

    • Measures latency as well as latency variation
    • Wide variety of probes, ranging from simple ping to web requests and custom protocols
    • Advanced alarm system, triggering on configurable 'latency patterns'
    • Master/slave deployment model to run measurments from multiple sources in parallel
    • Ajax based graph navigation
    • Chart mode, to show the most interesting graphs first. 
    • Plug-able probes, alarms (matchers) and charting function. 
    • Written in perl for easy enhancability. 
    • Fully documented.
    • Commandline option

    How SmokePing Works 

    SmokePing sends test packets out to the net and measures the amount of time they need to travel from one place to the other and back.
     
    For every round of measurement smokeping sends several packets. It then sorts the different round trip times and selects the median, (ie. the middle value). This means when there are 10 time values, value number 5 is selected and drawn. The other values are drawn as successively lighter shades of gray in the background (smoke).

    Sometimes a test packet is sent out but never returns. This is called packet-loss. The color of the median line changes according to the number of packets lost.

    All this information together gives an indication of network health. For example, packet loss is something which should not happen at all. It can mean that a device in the middle of the link is overloaded or a router configuration somewhere is wrong.

    Heavy fluctuation of the RTT (round trip time) values also indicate that the network is overloaded. This shows on the graph as smoke; the more smoke, the more fluctuation.

    Smokeping is not limited to testing just the roundtrip time of the packets. It can also perform some task at the remote end ("probe"), like download a webpage. This will give a combined 'picture' of webserver availability and network health.

    For more information click here

    SmokePing can be downloaded from here

    There is an online demo for SmokePing here

  • Netcps – Free utility to measure end to end TCP/IP performance

    NetCPS is a free tiny utility which can be used to measure effective performance for TCP/IP network. Run NetCPS in server mode on one machine and query using NetCPS from another machine to measure performance.

    To run in server mode, Start "netcps -s" on one machine, and from another machine run netcps as netcps IP ADDRESS (ex: netcps 192.168.0.1) on the other machine, and the two programs will pump 100 MB of data over the network. The CPS is measured with 1/1000 second's accuracy.

    Note that winsock seems to take quite some CPU resources on high-speed connections. The author explains that he got ~4 MB/s max on a Intel Pentium 133, and ~7 MB/s on an AMD K6 200, using a Intel Intel Pro 200 server with NT 4.0 Server as the other host. He got a report that two Pentium 200 servers running NT 4.0 server had 10 MB/s on a direct connection (server to server, no hub or switch).

    Netcps use a normal TCP/IP connection, pumping data without any disk access.

    The author Jarle Aase says Netcps was something he wrote in a hurry. He wrote it during a troubleshooting session with some cisco switches that seemed to have problems with 100 MBits connections. It should be useful for testing networks, and the performance of hubs, switches and routers. The program is targeted towards needs of testing performance, and has no fancy features. The program should however be useful for network professionals. It's quite small and easy to use.

    Netcps is freeware. You can use it, and the source code, to whatever purpose you want – with one small restriction: Governmental and military use is NOT permitted.

    Part of the source code is borrowed from the sample code at www.sockets.com

    For download the utility itself and the source code, click here

  • Leaf Networks – A free Network Sharing platform

    Leaf Networks™ is the Global Virtual Network Provider that is changing the way people use networks and networked devices, such as game consoles, media centers and servers, printers and network storage devices. Leaf Networks offers you a free service that gives you the ability easily form your own secure private network and bring together your networked devices with other members of your network.

    (more…)

  • Perlbal – Perl based Reverse proxy Load Balancer

    Perlbal is a Perl-based reverse proxy load balancer and a web server which can server millions of requests a day. Perlbal is a single-threaded event-based server supporting HTTP load balancing and web serving. (more…)

  • Pound – Light weight Reverse Proxy and Load Balancer

    Pound is a reverse proxy, load balancer and HTTPS front-end for Web server(s). Pound was developed to enable distributing the load among several Web-servers and to allow for a convenient SSL wrapper for those Web servers that do not offer it natively. Pound is distributed under the GPL license. (more…)

  • PingPlotter – A graphical trace route tool for troubleshooting

    PingPlotter is a small but very useful tool bringing fast, effective and graphical traceroute-based troubleshooting information. With graphical output, multi-threaded query engine and "copy as image" capability, PingPlotter is useful tool for individuals who need a light-weight, no-cost tool for running repeated traceroutes to a target.

    PingPlotter has a freeware version and feature rich Standard and Pro editions that one can buy.

    (more…)

  • FireKeeper – An Intrusion Detection and Prevention System for Firefox

    Firekeeper is an Intrusion Detection and Prevention System for Firefox. It is able to detect, block and warn the user about malicious sites.

    (more…)