diff --git a/search/engine/solr/classes/engine.php b/search/engine/solr/classes/engine.php
index 50042c3bfab..76818ab0c75 100644
--- a/search/engine/solr/classes/engine.php
+++ b/search/engine/solr/classes/engine.php
@@ -1192,7 +1192,8 @@ class engine extends \core_search\engine {
             return $this->curl;
         }
 
-        $this->curl = new \curl();
+        // Connection to Solr is allowed to use 'localhost' and other potentially blocked hosts/ports.
+        $this->curl = new \curl(['ignoresecurity' => true]);
 
         $options = array();
         // Build the SSL options. Based on pecl-solr and general testing.