85 lines
5.2 KiB
HTML
85 lines
5.2 KiB
HTML
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<meta name="DC.Title" content="TCP/IP communications trace" />
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<meta name="abstract" content="One of the uses of the trace tool is to show the clear text of a transmission in an environment where the data is encrypted." />
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<meta name="description" content="One of the uses of the trace tool is to show the clear text of a transmission in an environment where the data is encrypted." />
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<title>TCP/IP communications trace</title>
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</head>
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<body id="rbal1papptrace"><a name="rbal1papptrace"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">TCP/IP communications trace</h1>
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<div><p>One of the uses of the trace tool is to show the clear text of
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a transmission in an environment where the data is encrypted.</p>
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<div class="section"> <p>The trace data is captured before encryption at the sender, and
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after encryption at the receiver. However, the trace tool is useful in other
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environments as well. You can only use this function when you are using TCP/IP
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for communication.</p>
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<p>To use the <span class="cmdname">Trace TCP/IP Application
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(TRCTCPAPP)</span> command, you must have a user profile with *SERVICE
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special authority. To start the trace, enter the following line:</p>
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<pre>TRCTCPAPP *DDM</pre>
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<p>If
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you want to restrict the trace to a certain port, for example port 448 for
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SSL, follow this example: </p>
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<pre>TRCTCPAPP *DDM *ON RMTNETADR(*INET *N '255.255.255.255' 448)</pre>
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<p>After
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the communication that you are tracing has finished, run the following command
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and look at the resulting spooled file:</p>
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<pre>TRCTCPAPP *DDM *OFF</pre>
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<p id="rbal1papptrace__manytrace"><a name="rbal1papptrace__manytrace"><!-- --></a>If you traced more than one connection, you will need to locate
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and match your spool files to each QRWTSRVR job. The spool file name is QZBSTRC
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and the job is QRWxxxxxx, where xxxxxx is the job number placed in the user
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data for the spool file.</p>
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<p><strong>Restriction for use with *DDM application</strong></p>
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<p>When
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you use the <span class="cmdname">Trace TCP/IP Application (TRCTCPAPP)</span> command
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with the *DDM application, the maximum amount of data you can trace for a
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single sent or received message is limited to 6000 bytes.</p>
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</div>
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<div class="section"></div>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="rbal1trcformatting.htm">TCP/IP communication trace formatting</a></strong><br />
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The <span class="cmdname">Trace TCP/IP Application (TRCTCPAPP)</span> command
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can be used to break down DRDA<sup>®</sup> and DDM flows into an easier-to-read logical representation.
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It also displays the information in ASCII which can be of help in unlike environments.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rbal1gdrf.htm" title="This topic collection describes the kinds of data that you can print to help you diagnose a problem in a distributed relational database on iSeries servers.">Get data to report a failure</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rbal1commt.htm" title="If you get a message in the CPF3Exx range or the CPF91xx range when using Distributed Relational Database Architecture (DRDA) to access a distributed relational database, you should run a communications trace.">Communications trace</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="../cl/trctcpapp.htm">Trace TCP/IP Application (TRCTCPAPP) command</a></div>
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</div>
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</div>
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</body>
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</html>
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