91 lines
6.4 KiB
HTML
91 lines
6.4 KiB
HTML
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<title>Set up a new intrusion detection policy</title>
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</head>
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<body id="rzaubsetup"><a name="rzaubsetup"><!-- --></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">Set up a new intrusion detection policy</h1>
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<div><p>Learn how to set up an intrusion detection policy for the first
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time.</p>
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<div class="p">An intrusion detection (IDS) policy consists of two parts:<ul><li>An IDS condition that identifies the conditions (such as the port, protocol,
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or IP address) that applies to the IDS policy.</li>
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<li>An IDS action that identifies the actions to take when a condition is
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met. Multiple conditions can point to the same action.</li>
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</ul>
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<p>The IDS policy file, <span class="filepath">idspolicy.conf</span>,
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is shipped with the i5/OS™ system and stored in the <span class="filepath">/QIBM/ProdData/OS400/QOS/idspolicy.conf</span> directory.
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A sample IDS policy, which is commented out, is included in this shipped file. </p>
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</div>
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<div class="section">Ensure that you have authority to the <span class="filepath">/QIBM/UserData/OS400/QOS/ETC/</span> directory
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and the <span class="filepath">idspolicy.conf</span> file. Follow these steps to set
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up your intrusion detection policy for the first time:</div>
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<ol><li class="stepexpand"><span>Issue the following command to set IP QoS enablement to Yes:</span> <kbd class="userinput">CHGTCPA IPQOSENB(*YES)</kbd></li>
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<li class="stepexpand"><span>Issue the WRKSYSVAL command to set the auditing system values.
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Then you will see a list of system values.</span><ol type="a"><li class="substepexpand"><span>Type <kbd class="userinput">2</kbd> to display the auditing options
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for the QAUDLVL system value.</span></li>
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<li class="substepexpand"><span>Add <kbd class="userinput">*ATNEVT</kbd> to the list of auditing options. </span> <p>If there is no room in QAUDLVL to set *ATNEVT, be
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sure that *AUDLVL2 is set in QAUDLVL, as described below. Press PF3 to exit.</p>
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</li>
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<li class="substepexpand"><span>Type <kbd class="userinput">2</kbd> to display the auditing options
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for the QAUDLVL2 system value.</span></li>
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<li class="substepexpand"><span>Add <kbd class="userinput">*ATNEVT</kbd> to the list of auditing options.
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Press PF3 to exit.</span></li>
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</ol>
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</li>
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<li class="stepexpand"><span id="rzaubsetup__v5r4rev3"><a name="rzaubsetup__v5r4rev3"><!-- --></a>To configure the IDS policy file, copy the file from <span class="filepath">/QIBM/ProdData/OS400/QOS/idspolicy.conf</span> to <span class="filepath">/QIBM/UserData/OS400/QOS/ETC/</span>.</span></li>
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<li class="stepexpand"><span>Edit the IDS policy file.</span></li>
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<li class="stepexpand"><span>Start the QoS server using the following command:</span> <kbd class="userinput">strtcpsvr
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*qos</kbd> <p>When you start the QoS server, it looks
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in the <span class="filepath">ETC</span> directory for the <span class="filepath">idspolicy.conf</span> file.
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If the <span class="filepath">idspolicy.conf</span> file is not found, it is copied
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from the <span class="filepath">/QIBM/ProdData/OS400/QOS/</span> directory into the <span class="filepath">/QIBM/UserData/OS400/QOS/ETC/</span> directory.</p>
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</li>
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<li class="stepexpand"><span>Issue the Work with Active Jobs (WRKACTJOB) command to verify that
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the QoS server has started. You will see QTOQSRVR in the list of started servers.</span></li>
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</ol>
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<div class="section">Now your system is ready to catch suspicious events coming in through
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the TCP/IP network.</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="rzaubconfig.htm">Change the intrusion detection policy file</a></strong><br />
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Learn the steps for changing your intrusion detection policy file.</li>
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<li class="ulchildlink"><strong><a href="rzaubbackup.htm">Back up the intrusion detection policy file</a></strong><br />
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You should back up your intrusion detection (IDS) policies to eliminate the need to re-create your policies in the event of a server outage or power loss.</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="rzaubkickoff.htm" title="Intrusion detection involves gathering information about unauthorized access attempts and attacks coming in over the TCP/IP network. Security administrators can analyze the auditing records that intrusion detection provides to secure the iSeries network from these types of attacks.">Intrusion detection</a></div>
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</div>
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<div class="relref"><strong>Related reference</strong><br />
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<div><a href="rzaubkeyword.htm" title="Most of the keywords in the IDS policy file are supported in this release, but a few of them are not supported.">Keywords in the IDS policy file</a></div>
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</div>
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