diff --git a/r/56.md b/r/56.md
new file mode 100644
index 0000000..874c324
--- /dev/null
+++ b/r/56.md
@@ -0,0 +1,5 @@
+---
+redirect_to: https://tools.ietf.org/html/rfc6177
+permalink: /r/56.html
+sitemap: false
+---