diff --git a/makefu/2configs/lanparty/lancache-dns.nix b/makefu/2configs/lanparty/lancache-dns.nix
index 498162d13..c9da7c4c4 100644
--- a/makefu/2configs/lanparty/lancache-dns.nix
+++ b/makefu/2configs/lanparty/lancache-dns.nix
@@ -2,6 +2,8 @@
 with import <stockholm/lib>;
 let
   upstream-server = "8.8.8.8";
+  # make sure the router pins the ip address to the deployed host
+  # and set it as dns server ( dhcp option 6,192.168.10.10 )
   local_ip = "192.168.10.10";
 
   extra-config = pkgs.writeText "local.conf" ''