60 lines
4.2 KiB
HTML
60 lines
4.2 KiB
HTML
<?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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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Organize NAT rules with IP filter rules" />
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<meta name="abstract" content="While network address translation (NAT) and IP filtering work independently of each other, you can use NAT in conjunction with IP filtering." />
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<meta name="description" content="While network address translation (NAT) and IP filtering work independently of each other, you can use NAT in conjunction with IP filtering." />
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<title>Organize NAT rules with IP filter rules</title>
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</head>
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<body id="rzajbof-files"><a name="rzajbof-files"><!-- --></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">Organize NAT rules with IP filter rules</h1>
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<div><p>While network address translation (NAT) and IP filtering work independently
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of each other, you can use NAT in conjunction with IP filtering.</p>
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<p>If you choose to apply only NAT rules, your system will only perform address
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translation. Similarly, if you choose to apply only IP filter rules, your
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system will only filter IP traffic. However, if you apply both types of rules,
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your system will translate and filter addresses. When you use NAT and filtering
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together, the rules occur in a specific order. For inbound traffic, NAT rules
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process first. For outbound traffic, filter rules process first.</p>
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<p>You might want to consider using separate files to create your NAT and
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filter rules. Although this is not necessary, it will make your filter rules
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easier to read and troubleshoot. Either way (separate or together), you will
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receive the same errors. If you decide to use separate files for your NAT
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and filter rules, you can still activate both sets of rules. However, you
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should make sure that your rules do not interfere with one another.</p>
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<p>To activate both NAT and filtering rules at the same time, you need to
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use the <em>include</em> feature. For example, you created File A for filter
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rules and File B for NAT rules. You can include the contents of File B into
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File A without rewriting all of your rules. </p>
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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="rzajbrzajb1whatis.htm" title="Packet rules comprise both network address translation (NAT) rules and IP filtering rules. These two functions run at the IP layer of the TCP/IP stack and help protect your system against potential risks that are commonly associated with TCP/IP traffic.">Packet rules concepts</a></div>
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</div>
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<div class="reltasks"><strong>Related tasks</strong><br />
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<div><a href="rzajbrzajb88includessd.htm" title="You can activate more than one packet rules file on your system by using the Include feature of the Packet Rules Editor.">Include files in packet rules</a></div>
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</div>
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