70 lines
5.1 KiB
HTML
70 lines
5.1 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="DC.Type" content="task" />
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<meta name="DC.Title" content="Prevent access to Simple Mail Transfer Protocol ports" />
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<meta name="abstract" content="To secure your Simple Mail Transfer Protocol (SMTP) server from unknown applications, you might want to prevent access to SMTP ports." />
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<meta name="description" content="To secure your Simple Mail Transfer Protocol (SMTP) server from unknown applications, you might want to prevent access to SMTP ports." />
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<meta name="DC.Relation" scheme="URI" content="preventsmtpaccess.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2004, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2004, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="preventaccesstosmtp" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Prevent access to Simple Mail Transfer Protocol ports </title>
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</head>
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<body id="preventaccesstosmtp"><a name="preventaccesstosmtp"><!-- --></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">Prevent access to Simple Mail Transfer Protocol ports </h1>
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<div><p>To secure your Simple Mail Transfer Protocol (SMTP) server from
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unknown applications, you might want to prevent access to SMTP ports.</p>
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<div class="section">To prevent access SMTP from starting and to prevent someone from
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associating a user application, such as a socket application, with the port
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that the iSeries™ server
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normally uses for SMTP, perform the following steps:</div>
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<ol><li class="stepexpand"><span>In iSeries Navigator,
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expand <span class="menucascade"><span class="uicontrol">your iSeries Server</span> > <span class="uicontrol">Network</span> > <span class="uicontrol">Servers</span> > <span class="uicontrol">TCP/IP</span></span>.</span></li>
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<li class="stepexpand"><span>Right-click <span class="uicontrol">TCP/IP Configuration</span> and select <span class="uicontrol">Properties</span>.</span></li>
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<li class="stepexpand"><span>In the TCP/IP Configuration Properties window, click the <span class="uicontrol">Port
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Restrictions</span> tab.</span></li>
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<li class="stepexpand"><span>On the Port Restrictions page, click <span class="uicontrol">Add</span>.</span></li>
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<li class="stepexpand"><span>On the Add Port Restriction page, specify the following settings:</span> <ul><li><span class="uicontrol">User name</span>: Specify a user profile name that is
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protected on your iSeries server. (A protected user profile is a user
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profile that does not own programs that adopt authority and does not have
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a password that is known by other users.) By restricting the port to a specific
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user, you automatically exclude all other users.</li>
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<li><span class="uicontrol">Starting port</span>: <kbd class="userinput">25</kbd></li>
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<li><span class="uicontrol">Ending port</span>: <kbd class="userinput">25</kbd></li>
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<li><span class="uicontrol">Protocol</span>: <kbd class="userinput">TCP</kbd></li>
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</ul>
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</li>
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<li class="stepexpand"><span>Click <span class="uicontrol">OK</span> to add the restriction.</span></li>
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<li class="stepexpand"><span>On the <span class="uicontrol">Port Restrictions</span> page, click <span class="uicontrol">Add</span> and
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repeat the procedure for UDP.</span></li>
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<li class="stepexpand"><span>Click <span class="uicontrol">OK</span> to save your port restrictions
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and close the <span class="uicontrol">TCP/IP Configuration Properties</span> window.</span> The port restriction takes effect the next time that you start TCP/IP.
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If TCP/IP is active when you set the port restrictions, you should end TCP/IP
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and start it again. The port restriction takes effect the next
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time that you start TCP/IP. If TCP/IP is active when you set the port restrictions,
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you should end TCP/IP and start it again.</li>
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</ol>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="preventsmtpaccess.htm" title="If you do not want anyone to use Simple Mail Transfer Protocol (SMTP) to distribute mail to or from your iSeries server, you should prevent the SMTP server from running.">Prevent Simple Mail Transfer Protocol access</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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