ostu: tcping with windows (by tony fortunato)
DESCRIPTION
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.TRANSCRIPT
- 1. tcping with Windows QuickStart Tony Fortunato, Network Performance Specialist The Technology Firm
- 2. What is tcping?
- tcping is;
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- Go get it at http://www.elifulkerson.com/projects/
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- Portable, command line utility - no installation
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- Unlike other PING tools, tcping sends TCP SYN packets to the remote computer on specific TCP port numbers.
- 3. Why use tcping?
- tcping can be used for the following tasks;
- To check connectivity when;
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- ICMP, or ping is not allowed to the destination
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- 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
- 4. 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.
- 5. 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 wouldnt trust this part of the utility until I can figure out the time calculations
- 6. tcping interval option -i
- The i option will tcping at the provided interval value
- 7. tcping interval option -d
- The d option will display the date and time
- Great for batch files
- 8. 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
- 9. 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
- 10. 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
- 11. In Closing
- Pros
- Able to check TCP port numbers
- Has time display option
- Like the beep
- Interval option
- Cons
- 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 Cons
- 12. tcping with Windows QuickStart Thank you Tony Fortunato, Network Performance Specialist The Technology Firm
- 13.
- For additional educational videos on Open Source Network Tools, please click on the following
- http://www.lovemytool.com/blog/ostu.html