diff --git a/jtserv/jtserv.rb b/jtserv/jtserv.rb
index cb1ddcb..0bb17a9 100755
--- a/jtserv/jtserv.rb
+++ b/jtserv/jtserv.rb
@@ -458,6 +458,7 @@
     STDERR.printf("RECV%s: [%s]\n", user ? "("+user+")" : "",
                   json.reject{|k,v|k=="Passcode"}.to_json)
     if skey then
+      userinfo["trial"] = 0		# Reset auth count
       if json["team"] then
         #team[json["team"]][json["name"]] ||= nil
         userinfo = {"team" => json["team"], "name" => json["name"]}
@@ -516,6 +517,8 @@
         ws_conn.send(JSON.generate({"yourtext" => r}))
       end
     else ########## Before authenticated
+      userinfo["trial"] ||= 0
+      p userinfo["trial"]
       if json["Login"]
         user = json["Login"]
         email = db.email(user)
@@ -551,6 +554,7 @@
 p textDB.textfiles
           ws_conn.send(j)		# Login success by skey
         else
+          ## Need too frequent trial barrier here?
           ws_conn.send(JSON.generate({"fail" => "nokey"}))
         end
       elsif json["Passcode"]
@@ -569,6 +573,15 @@
           j = JSON.generate(r)
           ws_conn.send(j)		# Login success by token+tmpkey
         else
+          case userinfo["trial"]+=1
+          when 0..3
+          when 4..8
+            sleep 3
+          else
+            ws_conn.send(JSON.generate({"user"=>user, "fail"=>"byebye"}))
+            ws_conn.close
+            next
+          end
           j = JSON.generate({"user" => user, "fail" => "fail"})
           ws_conn.send(j)		# Login failure by token
         end