fix

ygopro-server.coffee

@@ -2070,7 +2070,7 @@ deck_name_match = global.deck_name_match = (deck_name, player_name) ->
 # return true to cancel a synchronous message
 
 ygopro.ctos_follow 'EXTERNAL_ADDRESS', true, (buffer, info, client, server, datas)->
-  ip_uint = info.real_ip
+  ip_uint = buffer.readUInt32BE(0)
   if ip_uint == 0
     return false
   ip_parts = [

ygopro-server.js

@@ -2776,7 +2776,7 @@
   // return true to cancel a synchronous message
   ygopro.ctos_follow('EXTERNAL_ADDRESS', true, function(buffer, info, client, server, datas) {
     var ip_parts, ip_uint, xff_ip;
-    ip_uint = info.real_ip;
+    ip_uint = buffer.readUInt32BE(0);
     if (ip_uint === 0) {
       return false;
     }