east one of values or not_values must be set.</p></td><td>No</td></tr></tbody></table></section><h2 id=Rule-From>Rule.From</h2><section><p>From includes a list or sources.</p><table class=message-fields><thead><tr><th>Field</th><th>Type</th><th>Description</th><th>Required</th></tr></thead><tbody><tr id=Rule-From-source><td><code>source</code></td><td><code><a href=#Source>Source</a></code></td><td><p>Source specifies the source of a request.</p></td><td>No</td></tr></tbody></table></section><h2 id=Rule-To>