<p>In contrast to the <code>host</code> provider, this provider does not
rely on reverse DNS lookups: it simply queries the DNS for the host name
and allows a client if its IP matches. As a consequence, it will only
- work with host names, not domain names. However, as the reverse DNS is
- not used, it will work with clients which use a dynamic DNS service.</p>
+ work with complete host names that can be resolved in DNS, not partial domain names.
+ However, as the reverse DNS is not used, and DNS lookups occur at request processing
+ time (instead of startup), it will work with clients which use a dynamic DNS service.</p>
<highlight language="config">
Require forward-dns dynamic.example.org