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<title>XMPP ICA: Dynamic DNS</title>
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<h2>XMPP ICA: Dynamic DNS</h2>
<p>The <a href='/ca/'>XMPP ICA</a> sometimes receives certificate requests from XMPP server administrators whose domains are hosted by "dynamic DNS" services such as,, and Unfortunately, <a href=''>StartCom</a> (our root CA) cannot issue certificates to subdomain of such services. There are two reasons for this restriction:</p>
  <li><p>Dynamic DNS subdomains (e.g., cannot be verified via <a href='whois.shtml'>Whois</a>.</p></li>
  <li><p>The administrators of such subdomains do not have access to authorized email addresses for the root domain (e.g.,, as described in the <a href='issuance.shtml'>Certificate Issuance HOWTO</a>.</p></li>
<p>For detailed information about this policy, please see the forum thread at &lt;<a href=''></a>&gt;. We apologize for any inconvenience this policy may cause you.</p>
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