diff --git a/example.json b/example.json
index baf3a03..c363f4e 100644
--- a/example.json
+++ b/example.json
@@ -3,5 +3,7 @@
     "bind":"127.0.0.1",
     "usessl":true,
     "key":"key.pem",
-    "cert":"cert.pem"
+    "cert":"cert.pem",
+    "usepassword":true,
+    "password":"example"
 }
diff --git a/threshold b/threshold
index ec43bb3..574b704 100755
--- a/threshold
+++ b/threshold
@@ -21,6 +21,18 @@ def error(data):
     print("[ERROR]", data)
     exit(1)
 
+def sendData(addr, data):
+    connections[addr].send(data)
+
+def sendSuccess(addr, data):
+    sendData(addr, "[y] " + data)
+
+def sendFailure(addr, data):
+    sendData(addr, "[n] " + data)
+
+def sendInfo(addr, data):
+    sendData(addr, "[i] " + data)
+
 class Base(Protocol):
     def __init__(self, addr):
         self.addr = addr
@@ -32,8 +44,9 @@ class Base(Protocol):
         self.transport.write(data)
 
     def dataReceived(self, data):
-        data = data.rstrip()
-        log("Data received from %s:%s -- %s" % (self.addr.host, self.addr.port, data))
+        data = data.decode("utf-8", "replace")
+        log("Data received from %s:%s -- %s" % (self.addr.host, self.addr.port, repr(data)))
+        helper.parseCommand(self.addr, self.authed, data)
 
     def connectionMade(self):
         log("Connection from %s:%s" % (self.addr.host, self.addr.port))
@@ -41,7 +54,7 @@ class Base(Protocol):
 
     def connectionLost(self, reason):
         global connections
-        log("Connection lost from %s: %s" % (self.addr.host, reason.getErrorMessage()))
+        log("Connection lost from %s:%s -- %s" % (self.addr.host, self.addr.port, reason.getErrorMessage()))
         if not listener == None:
             if self.addr in connections.keys():
                 del connections[self.addr]
@@ -69,14 +82,62 @@ class Helper(object):
     def getConfig(self):
         with open("config.json", "r") as f:
             config = load(f)
-            if set(["port", "bind", "usessl"]).issubset(set(config.keys())):
+            if set(["port", "bind", "usessl", "usepassword"]).issubset(set(config.keys())):
                 if config["usessl"] == True:
                     if not set(["cert", "key"]).issubset(set(config.keys())):
                         error("SSL is on but certificate or key is not defined")
+                if config["usepassword"] == True:
+                    if not "password" in config.keys():
+                        error("Password authentication is on but password is not defined")
                 return config
             else:
                 error("Mandatory values missing from config")
 
+    def parseCommand(self, addr, authed, data):
+        data = data.strip()
+        spl = data.split()
+        obj = connections[addr]
+
+        success = lambda data: sendSuccess(addr, data)
+        failure = lambda data: sendFailure(addr, data)
+        info = lambda data: sendInfo(addr, data)
+
+        incUsage = lambda: sendFailure(addr, "Incorrect usage")
+        length = len(spl)
+        if len(spl) > 0:
+            cmd = spl[0]
+        else:
+            send("No text was sent")
+            return
+        if authed == True:
+            if cmd == "pass":
+                info("You are already authenticated")
+                return
+            elif cmd == "logout":
+                obj.authed = False
+                success("Logged out")
+                return
+            else:
+                incUsage()
+                return
+        else:
+            if cmd == "pass":
+                if length == 2:
+                    if spl[1] == config["password"]:
+                        success("Authenticated successfully")
+                        obj.authed = True
+                        return
+                    else:
+                        failure("Password incorrect")
+                        obj.transport.loseConnection()
+                        return
+                else:
+                    incUsage()
+                    return
+            else:
+                incUsage()
+                return
+
 if __name__ == "__main__":
     helper = Helper()
     config = helper.getConfig()
@@ -86,7 +147,7 @@ if __name__ == "__main__":
         reactor.listenSSL(config["port"], listener, DefaultOpenSSLContextFactory(config["key"], config["cert"]), interface=config["bind"])
         log("Threshold running with SSL on %s:%s" % (config["bind"], config["port"]))
     else:
-        reactor.listen(config["port"], listener, interface=config["bind"])
+        reactor.listenTCP(config["port"], listener, interface=config["bind"])
         log("Threshold running on %s:%s" % (config["bind"], config["port"]))
 
     reactor.run()