<header>Dynamic DNS service</header>

This field selects what Virtualmin contacts when it detects that the system's
IP address has changed. <p>

The available options are described below.<p>

<dl>
<dt>DynDNS-compatible service
<dd>Updates a provider that implements the DynDNS update protocol. Enter the
    provider's update server in the adjacent field as a hostname or
    <tt>hostname:port</tt>. The default is <tt>members.dyndns.org</tt>, and
    the connection always uses HTTPS. The login, password, and full hostname
    fields are sent to the selected provider.
<dt>Virtualmin system
<dd>Asks another Virtualmin installation to update the hostname's DNS record.
    Enter that system's hostname in the adjacent field, using the
    <tt>hostname:port</tt> format if Webmin listens on a port other than the
    default of 10000, along with login credentials that can modify the domain.
<dt>Run external script
<dd>Runs the absolute path entered in the adjacent field. Virtualmin passes
    the new IP address, the configured hostname, and the previous IP address
    to the script as command-line arguments.
<dt>Don't update any service
<dd>Skips notification of an external service. Dynamic address detection and
    optional updates to local virtual servers can still remain enabled.
</dl>

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