OSTU: tcping with Windows (by Tony Fortunato)
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OSTU: tcping with Windows (by Tony Fortunato)

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Tony Fortunato is a Senior Network Specialist with experience in design, implementation, and troubleshooting of LAN/WAN/Wireless networks, desktops and servers since 1989. His background in financial ...

Tony Fortunato is a Senior Network Specialist with experience in design, implementation, and troubleshooting of LAN/WAN/Wireless networks, desktops and servers since 1989. His background in financial networks includes design and implementation of trading floor networks. Tony has taught at local high schools, Colleges/Universities, Networld/Interop and many onsite private classroom settings to thousands of analysts.

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    OSTU: tcping with Windows (by Tony Fortunato) OSTU: tcping with Windows (by Tony Fortunato) Presentation Transcript

    • tcping with Windows QuickStart Tony Fortunato, Network Performance Specialist The Technology Firm
    • What is tcping?
      • tcping is;
        • Go get it at http://www.elifulkerson.com/projects/
        • Portable, command line utility - no installation
        • Unlike other PING tools, tcping sends TCP SYN packets to the remote computer on specific TCP port numbers.
    • Why use tcping?
      • tcping can be used for the following tasks;
      • To check connectivity when;
        • ICMP, or ping is not allowed to the destination
        • Multiple paths maybe used for different port numbers
      • Measures the time (in milliseconds) it takes for a packet to travel from your computer to a specified destination, with the accuracy of three decimal places.
      • Change the interval between tcping packets
      • You can even enable a beep to let you know when the destination is up, or down
    • Starting tcping
      • To start the tcping utility you must open the folder in the command prompt.
      • If you have the Windows Powertoy, simply right click on the tcping folder and then open in command prompt.
      • Once the command prompt opens into the tcping folder, type tcping on the command line to view the options.
      C:Documents and SettingsTony FortunatoDesktopoffice cping>tcping -------------------------------------------------------------- tcping.exe by Eli Fulkerson Please see http://www.elifulkerson.com/projects/ for updates. -------------------------------------------------------------- Usage: tcping [-t] [-d] [-i interval] [-n times] server-address [server-port] -t : ping continuously until stopped via control-c -n 5 : for instance, send 5 pings -i 5 : for instance, ping every 5 seconds -d : include date and time on each line -b 1 : enable beeps (1 for on-down, 2 for on-up, 3 for on-change, 4 for always) If you don't pass server-port, it defaults to 80.
    • tcping Accuracy
      • When I used the utility to tcping my local router and got over 1 millisecond, I had to double-check with my protocol analyzer
      • Not sure how it calculates its response time, so I wouldn’t trust this part of the utility until I can figure out the time calculations
    • tcping interval option -i
      • The –i option will tcping at the provided interval value
    • tcping interval option -d
      • The –d option will display the date and time
      • Great for batch files
    • tcping with Errors and Timeouts
      • In the example below a tcping checking 10.44.10.1 for TCP port 23, which is not supported, resulting in Connection refused messages
    • tcping with Errors and Timeouts
      • In the example below a tcping checking 10.44.10.11 for TCP port 23
      • This host is not up, resulting in a Connection timed out message
    • tcping with Errors and Timeouts
      • In the example below tcping checked host 10.44.10.108 for TCP port 80
      • This webserver was up, but crashed, resulting in the following messages below
    • In Closing…
      • Pro’s
      • Able to check TCP port numbers
      • Has time display option
      • Like the beep
      • Interval option
      • Con’s
      • Response time measurement not accurate
      • No ability to test UDP port numbers
      • Would I use it?
      • Yes, since I can not find a command line tool to ping tcp port numbers and live with the Con’s
    • tcping with Windows QuickStart Thank you Tony Fortunato, Network Performance Specialist The Technology Firm
      • For additional educational videos on Open Source Network Tools, please click on the following …
      • http://www.lovemytool.com/blog/ostu.html
      LoveMyTool.com – Community for Network Tools