diff --git a/src/main/java/de/thm/arsnova/controller/WelcomeController.java b/src/main/java/de/thm/arsnova/controller/WelcomeController.java
index c036abda8e3be9e8068340da46af383a9baf5969..0a394245c3f49d8784f0e68617f2c83fefa3a502 100644
--- a/src/main/java/de/thm/arsnova/controller/WelcomeController.java
+++ b/src/main/java/de/thm/arsnova/controller/WelcomeController.java
@@ -85,7 +85,7 @@ public class WelcomeController extends AbstractController {
 			final HttpServletRequest request
 		) {
 		/* Block requests from the server itself to prevent DoS attacks caused by request loops */
-		if ("127.0.0.1".equals(request.getRemoteAddr())) {
+		if ("127.0.0.1".equals(request.getRemoteAddr()) || "::1".equals(request.getRemoteAddr())) {
 			throw new BadRequestException("Access to localhost not allowed.");
 		}
 		/* Block requests to servers in private networks */