diff --git a/auth.lua b/auth.lua
index aff73fc..4d3d4ad 100644
--- a/auth.lua
+++ b/auth.lua
@@ -6,7 +6,20 @@ if args[1] == nil then
 end
 
 local action = args[1]
-local server = "auth.layla.mc"
+
+settings.define("auth.token", {
+    description = "Authentication token",
+    type = "string",
+    default = ""
+})
+
+settings.define("auth.server", {
+    description = "Authentication server",
+    type = "string",
+    default = "auth.box"
+})
+
+local server = settings.get("auth.server")
 
 function lns_lookup(hostname)
     local data = {
@@ -65,8 +78,8 @@ if action == "login" then
         end
     end
 
+    settings.set("auth.token", token)
     io.write("Logged in as " .. username .. "\n")
-    io.write("Token: " .. token .. "\n")
     return
 end
 
diff --git a/lns_server.lua b/lns_server.lua
index 8d37edd..02f9903 100644
--- a/lns_server.lua
+++ b/lns_server.lua
@@ -1,8 +1,31 @@
 
-modem_location = "right"
+settings.define("lns_server.modem_location", {
+    description = "Modem location",
+    type = "string",
+    default = "right"
+})
+modem_location = settings.get("lns_server.modem_location")
 
+settings.define("lns_server.rednet_hostname", {
+    description = "Rednet hostname",
+    type = "string",
+    default = "test"
+})
 
-rednet.host("lns", "default")
+settings.define("lns_server.require_auth", {
+    description = "Require authentication",
+    type = "boolean",
+    default = false
+})
+require_auth = settings.get("lns_server.require_auth")
+
+settings.define("lns_server.auth_server", {
+    description = "Authentication server",
+    type = "string",
+    default = "auth.box"
+})
+
+rednet.host("lns", settings.get("lns_server.rednet_hostname"))
 rednet.open(modem_location)
 
 local data = {}
@@ -68,9 +91,37 @@ while true do
     end
 
     if request.action == "register" then
-        data[request.hostname] = client_id
-        log("Registered " .. request.hostname .. " as " .. client_id)
-        save_data()
-        rednet.send(client_id, "ok")
+
+        local auth_passed = false
+        if require_auth then
+            local authID = data[auth_server]
+            if authID ~= nil then
+                rednet.send(authID, {
+                    action = "token",
+                    token = request.token
+                })
+
+                local auth_response = rednet.receive()
+                local errorPos, errorEnd = string.find(auth_response, "invalid")
+                if errorPos then
+                    log("Error: " .. auth_response)
+                else
+                    auth_passed = true
+                end
+            else
+                log("Error: Auth server not found to " .. client_id)
+            end
+        else
+            auth_passed = true
+        end
+
+        if auth_passed then
+            data[request.hostname] = client_id
+            log("Registered " .. request.hostname .. " as " .. client_id)
+            save_data()
+            rednet.send(client_id, "ok")
+        else
+            rednet.send(client_id, "auth required")
+        end
     end
 end
\ No newline at end of file
diff --git a/register_lns.lua b/register_lns.lua
index d9bdc22..3c9448f 100644
--- a/register_lns.lua
+++ b/register_lns.lua
@@ -21,7 +21,8 @@ current_time = os.time()
 
 data = {
     ["action"] = "register",
-    ["hostname"] = hostname
+    ["hostname"] = hostname,
+    ["token"] = settings.get("auth.token", nil)
 }
 
 rednet.send(receiverID, data)