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<title>Configure VPN on iSeries-A</title>
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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">Configure VPN on iSeries-A</h1>
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<div><div class="section"><p>Follow these steps to configure VPN on iSeries-A:</p>
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</div>
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<ol><li><span><span class="uicontrol">Configure the Internet Key Exchange policy</span></span><ol type="a"><li class="substepexpand"><span>In <span class="keyword">iSeries™ Navigator</span>,
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expand iSeries-A<span class="menucascade"><span class="uicontrol"></span> > <span class="uicontrol">Network</span> > <span class="uicontrol">IP Policies</span> > <span class="uicontrol">Virtual Private Networking</span> > <span class="uicontrol">IP Security Policies</span></span>.</span> </li>
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<li class="substepexpand"><span>Right-click <span class="uicontrol">Internet Key Exchange Policies</span> and
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select <span class="uicontrol">New Internet Key Exchange Policy</span>.</span></li>
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<li class="substepexpand"><span>On the <span class="uicontrol">Remote Server</span> page, select <span class="uicontrol">Version
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4 IP address</span> as the identifier type and then enter <samp class="codeph">205.13.237.6</samp> in
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the <span class="uicontrol">IP address</span> field.</span></li>
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<li class="substepexpand"><span>On the <span class="uicontrol">Associations</span> page, select <span class="uicontrol">Preshared
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key</span> to indicate that this connection uses a preshared key to authenticate
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this policy.</span></li>
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<li class="substepexpand"><span>Enter the preshared key in the <span class="uicontrol">Key</span> field.
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Treat your preshared key like a password.</span></li>
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<li class="substepexpand"><span>Select <span class="uicontrol">Key Identifier</span> for the local key
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server identifier type, and then enter the key identifier in the <span class="uicontrol">Identifier</span> field.
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For example, <samp class="codeph">thisisthekeyid</samp>. Remember that the local key
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server has a dynamically assigned IP address which is impossible to know in
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advance. iSeries-B uses this identifier to identify the iSeries-A when iSeries-A
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initiates a connection.</span></li>
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<li class="substepexpand"><span>On the <span class="uicontrol">Transforms</span> page, click <span class="uicontrol">Add</span> to
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add the transforms that iSeries-A proposes to iSeries-B for key protection
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and to specify whether the IKE policy uses identity protection when initiating
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phase 1 negotiations.</span></li>
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<li class="substepexpand"><span>On the <span class="uicontrol">IKE Policy Transform</span> page, select <span class="uicontrol">Preshared
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key</span> for your authentication method, <span class="uicontrol">SHA</span> for
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your hash algorithm, and <span class="uicontrol">3DES-CBC</span> for your encryption
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algorithm. Accept the default values for Diffie-Hellman group and Expire IKE
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keys after.</span></li>
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<li class="substepexpand"><span>Click <span class="uicontrol">OK</span> to return to the <span class="uicontrol">Transforms</span> page.</span></li>
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<li class="substepexpand"><span>Select <span class="uicontrol">IKE aggressive mode negotiation (no identity
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protection).</span></span> <div class="note"><span class="notetitle">Note:</span> If you use preshared keys and aggressive
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mode negotiation together in your configuration, select obscure passwords
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that are unlikely to be cracked in attacks that scan the dictionary. It is
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also recommended you periodically change your passwords.</div>
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</li>
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<li class="substepexpand"><span>Click <span class="uicontrol">OK</span> to save your configurations.</span></li>
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</ol>
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</li>
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<li><span><span class="uicontrol">Configure the data policy</span></span><ol type="a"><li class="substepexpand"><span>From the VPN interface, right-click <span class="uicontrol">Data policies</span> and
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select <span class="uicontrol">New Data Policy</span></span> </li>
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<li class="substepexpand"><span>On the <span class="uicontrol">General</span> page, specify the name
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of the data policy. For example, <samp class="codeph">l2tpremoteuser</samp></span></li>
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<li class="substepexpand"><span>Go to the <span class="uicontrol">Proposals</span> page. A proposal
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is a collection of protocols that the initiating and responding key servers
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use to establish a dynamic connection between two endpoints. You can use a
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single data policy in several connection objects. However, not all remote
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VPN key servers necessarily have the same data policy properties. Therefore,
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you can add several proposals to one data policy. When establishing a VPN
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connection to a remote key server, there must be at least one matching proposal
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in the data policy of the initiator and the responder.</span></li>
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<li class="substepexpand"><span>Click <span class="uicontrol">Add</span> to add a data policy transform</span></li>
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<li class="substepexpand"><span>Select <span class="uicontrol">Transport</span> for the encapsulation
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mode.</span></li>
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<li class="substepexpand"><span>Click <span class="uicontrol">OK</span> to return to the <span class="uicontrol">Transforms</span> page.</span></li>
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<li class="substepexpand"><span>Specify a key expiration value.</span></li>
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<li class="substepexpand"><span>Click <span class="uicontrol">OK</span> to save your new data policy.</span></li>
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</ol>
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</li>
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<li><span><span class="uicontrol">Configure the dynamic-key group</span></span><ol type="a"><li class="substepexpand"><span>From the VPN interface, expand <span class="uicontrol">Secure Connections</span>.</span> </li>
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<li class="substepexpand"><span>Right-click <span class="uicontrol">By Group</span> and select <span class="uicontrol">New
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Dynamic-Key Group</span>.</span></li>
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<li class="substepexpand"><span>On the <span class="uicontrol">General</span> page, specify a name for
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the group. For example, <samp class="codeph">l2tptocorp</samp>.</span></li>
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<li class="substepexpand"><span>Select <span class="uicontrol">Protects a locally initiated L2TP tunnel</span>.</span></li>
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<li class="substepexpand"><span>For system role, select <span class="uicontrol">Both systems are hosts</span>.</span></li>
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<li class="substepexpand"><span>Go to the <span class="uicontrol">Policy</span> page. Select the data
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policy you created in the step<span class="uicontrol">Configure the data policy</span>, <samp class="codeph">l2tpremoteuser</samp>,
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from the <span class="uicontrol">Data policy</span> drop-down list.</span></li>
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<li class="substepexpand"><span>Select <span class="uicontrol">Local system initiates connection</span> to
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indicate that only iSeries-A can initiate connections with iSeries-B.</span></li>
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<li class="substepexpand"><span>Go to the <span class="uicontrol">Connections</span> page. Select <span class="uicontrol">Generate
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the following policy filter rule for this group</span>. Click <span class="uicontrol">Edit</span> to
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define the parameters of the policy filter.</span></li>
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<li class="substepexpand"><span>On the <span class="uicontrol">Policy Filter- Local Addresses</span> page,
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select <span class="uicontrol">Key Identifier</span> for the identifier type.</span></li>
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<li class="substepexpand"><span>For the identifier, select the key identifier, <samp class="codeph">thisisthekeyid</samp>,
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that you defined in the IKE policy.</span></li>
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<li class="substepexpand"><span>Go the <span class="uicontrol">Policy Filter - Remote Addresses</span> page.
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Select <span class="uicontrol">IP version 4 address</span> from the <span class="uicontrol">Identifier
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type</span> drop-down list.</span></li>
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<li class="substepexpand"><span>Enter <samp class="codeph">205.13.237.6</samp> in the <span class="uicontrol">Identifier</span> field.</span></li>
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<li class="substepexpand"><span>Go to the <span class="uicontrol">Policy Filter - Services</span> page.
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Enter <samp class="codeph">1701</samp> in the <span class="uicontrol">Local Port</span> and <span class="uicontrol">Remote
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Port</span> fields. Port 1701 is the well-known port for L2TP.</span></li>
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<li class="substepexpand"><span>Select <span class="uicontrol">UDP</span> from the <span class="uicontrol">Protocol</span> drop-down
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list.</span></li>
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<li class="substepexpand"><span>Click <span class="uicontrol">OK</span> to return to the <span class="uicontrol">Connections</span> page.</span></li>
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<li class="substepexpand"><span>Go to the <span class="uicontrol">Interfaces</span> page. Select any
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line or PPP profile to which this group will apply. You have not created the
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PPP profile for this group yet. After you do so, you will need to edit the
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properties of this group so that the group applies to the PPP profile you
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create in the next step.</span></li>
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<li class="substepexpand"><span>Click <span class="uicontrol">OK</span> to create the dynamic-key group,
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l2tptocorp.</span></li>
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</ol>
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</li>
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<li><span><span class="uicontrol">Configure the dynamic-key connection</span></span><ol type="a"><li class="substepexpand"><span>From the VPN interface, expand <span class="uicontrol">By Group</span>.
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This displays a list of all dynamic-key groups you have configured on iSeries-A.</span> </li>
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<li class="substepexpand"><span>Right-click <span class="uicontrol">l2tptocorp</span> and select <span class="uicontrol">New
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Dynamic-Key Connection</span>.</span></li>
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<li class="substepexpand"><span>On the <span class="uicontrol">General</span> page, specify an optional
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description for the connection.</span></li>
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<li class="substepexpand"><span>For the remote key server, select <span class="uicontrol">Version 4 IP address</span> for
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the identifier type.</span></li>
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<li class="substepexpand"><span>Select <samp class="codeph">205.13.237.6</samp> from the <span class="uicontrol">IP
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address</span> drop-down list.</span></li>
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<li class="substepexpand"><span>Deselect <span class="uicontrol">Start on-demand</span>.</span></li>
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<li class="substepexpand"><span>Go to the <span class="uicontrol">Local Addresses</span> page. Select <span class="uicontrol">Key
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identifier</span> for the identifier type and then select <samp class="codeph">thisisthekeyid</samp> from
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the <span class="uicontrol">Identifier</span> drop-down list.</span></li>
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<li class="substepexpand"><span>Go to the <span class="uicontrol">Remote Addresses</span> page. Select <span class="uicontrol">IP
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version 4 address</span> for the identifier type.</span></li>
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<li class="substepexpand"><span>Enter <samp class="codeph">205.13.237.6</samp> in the <span class="uicontrol">Identifier</span> field.</span></li>
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<li class="substepexpand"><span>Go to the <span class="uicontrol">Services</span> page. Enter <samp class="codeph">1701</samp> in
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the <span class="uicontrol">Local Port</span> and <span class="uicontrol">Remote Port</span> fields.
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Port 1701 is the well-known port for L2TP.</span></li>
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<li class="substepexpand"><span>Select <span class="uicontrol">UDP</span> from the <span class="uicontrol">Protocol</span> drop-down
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list</span></li>
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<li class="substepexpand"><span>Click <span class="uicontrol">OK</span> to create the dynamic-key connection.</span></li>
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</ol>
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</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="rzajaremoteuser.htm" title="In this scenario, you learn how to setup a connection between a branch office host and a corporate office that uses L2TP protected by IPSec. The branch office has a dynamically assigned IP address, while the corporate office has a static, globally routable IP address.">Scenario: Protect an L2TP voluntary tunnel with IPSec</a></div>
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<div class="nextlink"><strong>Next topic:</strong> <a href="rzajaconfigureapppconnection.htm">Configure a PPP connection profile and virtual line on iSeries-A</a></div>
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</div>
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