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Client Application reaction to loss of network.

Posted on 2004-08-09
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Last Modified: 2010-04-11
We have a MS Windows based client application which resides on a local LAN. It accesses and receives data from a WAN over multiple protocols. They are UDP/X.25, TCP/IP and HTTP. It is a high transaction environment.

The client either hangs or closes if there is a problem with accessing or recieving data over the WAN.  However, the exact nature of the problem is not known.

We are looking for a place to start to troubleshoot the problem assumed to be the network. Where do we start? How can we determine what is happening with the data access or receive before or at the moment the application hangs or closes?

What utilities are available for this type of troubleshooting? Do you have to know data coms to use them?
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Question by:pcoghlan
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Yan_west earned 50 total points
ID: 11758985
I would use Ethereal, The world's most popular network protocol analyzer..

"Ethereal is used by network professionals around the world for troubleshooting, analysis, software and protocol development, and education. It has all of the standard features you would expect in a protocol analyzer, and several features not seen in any other product. Its open source license allows talented experts in the networking community to add enhancements. It runs on all popular computing platforms, including Unix, Linux, and Windows"

http://www.ethereal.com/

with this software, you can add a filter only to inspect the type of traffic you want..  so you can isolate your problem, and see what is the problem exactly. It takes a professionnal to be able to read the content of the traffic you will be capturing. Not something easy to do.

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