1 files changed, 32 insertions, 0 deletions
diff --git a/lib/public/Security/IRemoteHostValidator.php b/lib/public/Security/IRemoteHostValidator.php
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index 00000000000..0707a633073
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+++ b/lib/public/Security/IRemoteHostValidator.php
@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * SPDX-FileCopyrightText: 2022 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCP\Security;
+
+/**
+ * Validator for remote hosts
+ *
+ * @since 26.0.0
+ */
+interface IRemoteHostValidator {
+	/**
+	 * Validate if a host may be connected to
+	 *
+	 * By default, Nextcloud does not connect to any local servers. That is neither
+	 * localhost nor any host in the local network.
+	 *
+	 * Admins can overwrite this behavior with the global `allow_local_remote_servers`
+	 * settings flag. If the flag is set to `true`, local hosts will be considered
+	 * valid.
+	 *
+	 * @param string $host hostname of the remote server, IPv4 or IPv6 address
+	 *
+	 * @return bool
+	 * @since 26.0.0
+	 */
+	public function isValid(string $host): bool;
+}