ibm-information-center/dist/eclipse/plugins/i5OS.ic.rzalr_5.4.0.1/rzalradvvpn20.htm

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<title>VPN planning advisor</title>
</head>
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<H2>VPN planning advisor</H2>
<STRONG>Authentication method</STRONG>
<p>To establish a VPN the two connection endpoints of the VPN need to authenticate each other. OS/400<Sup>R</Sup> VPN
uses either RSA signature mode or preshared keys to do this.<p>
<p>A <strong>preshared key</strong> is a nontrivial string up to 128 characters long. Both ends of a connection must
agree upon the preshared key. The advantage of using preshared keys is their simplicity, the
disadvantage is that a shared secret must be distributed out-of-band, for example over the phone or
through registered mail, prior to IKE negotiations. You should treat your preshared key as you would
a password.</p>
<p><strong>RSA Signature</strong> authentication provides more security than preshared keys because this
mode uses digital certificates to provide authentication. You must configure your digital certificates
by using Digital Certificate Manager (5722-SS1 Option 34).</p>
<P>How do you plan to authenticate the key servers?</p>
<form action=submit name="form1">
<table>
<tr><td>&nbsp;</td>
<td><label for="certsQ"><INPUT TYPE="radio" id="certsQ" NAME="local" VALUE="certificate" checked>Digital certificate</label></td>
<tr><td>&nbsp;</td>
<td><label for="keyQ"><INPUT TYPE="radio" NAME="local" id="keyQ" VALUE="presharedkey">Preshared key</label></td>
</tr>
</table>
<p>&nbsp;</p>
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