allow udp dns egress

terraform/modules/ret/main.tf

@@ -341,6 +341,14 @@ resource "aws_security_group" "ret" {
     cidr_blocks = ["0.0.0.0/0"]
   }
 
+  # DNS
+  egress {
+    from_port = "53"
+    to_port = "53"
+    protocol = "udp"
+    cidr_blocks = ["0.0.0.0/0"]
+  }
+
   # NFS upload-fs
   egress {
     from_port = "2049"