ibm-information-center/dist/eclipse/plugins/i5OS.ic.rzaja_5.4.0.1/rzajawhatnewvpn.htm

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<meta name="DC.Title" content="What's new for V5R4" />
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<title>What's new for V5R4</title>
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<h1 class="topictitle1">What's new for V5R4</h1>
<div><p>Describes what information is new or significantly changed in this
release.</p>
<div class="section"><h4 class="sectiontitle">New Function: Traffic Flow Confidentiality (TFC)</h4><p>Traffic
Flow Confidentiality (TFC) allows you to conceal the actual length of the
data packets transferred over the VPN connection. Use TFC for extra security
against attackers who might guess the type of data being sent over the VPN
connection from the length of the data packet. You can only use TFC if your
data policy is setup for Tunnel Mode. </p>
<ul><li><a href="rzajatfc.htm">Configure Traffic Flow Confidentiality (TFC)</a></li>
</ul>
</div>
<div class="section"><h4 class="sectiontitle">New Function: Extended Sequence Number (ESN)</h4><p>Extended
Sequence Number (ESN) allows your VPN connection to transmit large volumes
of data at a high speed with out having to frequently re-key. You can only
enable ESN when your data policy uses the Authentication Header (AH) protocol
or the Encapsulation Security Payload (ESP) protocol and AES as the encryption
algorithm.</p>
<ul><li><a href="rzajaconfigureesn.htm">Configure Extended Sequence Number (ESN)</a></li>
</ul>
</div>
<div class="section"><h4 class="sectiontitle">New Scenario: Firewall Friendly VPN</h4><p>In this scenario
you can learn how to establish a VPN connection where the gateway (client)
and the host (server) are behind a firewall running Network Address Translation
(NAT). </p>
<ul><li><a href="rzajaupdscenario.htm">Scenario: Firewall Friendly VPN</a></li>
</ul>
</div>
<div class="section"><h4 class="sectiontitle">How to see what's new or changed</h4><div class="p">To help you see
where technical changes have been made, this information uses: <ul><li>The <img src="delta.gif" alt="Start of change" /> image to mark
where new or changed information begins.</li>
<li>The <img src="deltaend.gif" alt="End of change" /> image to mark
where new or changed information ends.</li>
</ul>
</div>
<p>To find other information about what's new or changed this release,
see the <a href="../rzahg/rzahgmtu.htm">Memo
to Users</a>.</p>
</div>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzajagetstart.htm" title="A virtual private network (VPN) allows your company to securely extend its private intranet over the existing framework of a public network, such as the Internet. With VPN, your company can control network traffic while providing important security features such as authentication and data privacy.">Virtual Private Networking (VPN)</a></div>
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