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-rw-r--r--config/config.sample.php8
1 files changed, 7 insertions, 1 deletions
diff --git a/config/config.sample.php b/config/config.sample.php
index 3b5632087f6..5c362e94250 100644
--- a/config/config.sample.php
+++ b/config/config.sample.php
@@ -1017,7 +1017,13 @@ $CONFIG = array(
/**
* Headers that should be trusted as client IP address in combination with
- * `trusted_proxies`
+ * `trusted_proxies`. If the HTTP header looks like 'X-Forwarded-For', then use
+ * 'HTTP_X_FORWARDED_FOR' here.
+ *
+ * If set incorrectly, a client can spoof their IP address as visible to
+ * ownCloud, bypassing access controls and making logs useless!
+ *
+ * Defaults to 'HTTP_X_FORWARED_FOR' if unset
*/
'forwarded_for_headers' => array('HTTP_X_FORWARDED', 'HTTP_FORWARDED_FOR'),