equired</th></tr></thead><tbody><tr id=Source-principals><td><code>principals</code></td><td><code>string[]</code></td><td><p>Optional. A list of source peer identities (i.e. service account), which
matches to the &ldquo;source.principal&rdquo; attribute. This field requires mTLS enabled.</p><p>If not set, any principal is allowed.</p></td><td>No</td></tr><tr id=Source-not_principals><td><code>notPrincipals</code></td><td><code>string[]</code></td><td><p>Optional. A list of negative match of source peer ide