diff --git a/Log.h b/Log.h
index fa4c160..785e3da 100644
--- a/Log.h
+++ b/Log.h
@@ -29,9 +29,7 @@ class Log
 	string *objectName;
 	pthread_mutex_t *writeMutex;
 	int delayVal;
-protected:
-	string* getObjectName() const;
-	void setObjectName(string* objectName);
+
 public:
 	Log();
 	void print(string msg);
@@ -47,6 +45,8 @@ public:
 	void delay(int optional=-1);
 	int getDelay() const;
 	void setDelay(int delay);
+	string* getObjectName() const;
+	void setObjectName(string* objectName);
 };
 
 #endif /* LOG_H_ */
diff --git a/NATRouter.cpp b/NATRouter.cpp
index 2eb5927..fac0214 100644
--- a/NATRouter.cpp
+++ b/NATRouter.cpp
@@ -11,7 +11,7 @@ void NATRouter::initalizeNatTable()
 {
 	try
 	{
-		natTable = new NATItem[65536];
+		natTable = new NATItem[NAT_TABLE_LEN];
 	}
 	catch (bad_alloc &ba)
 	{
@@ -42,7 +42,7 @@ NATRouter::NATRouter(string hostname, string ip, string mask, string gatewayIp)
 
 int NATRouter::getFreePort()
 {
-	for (int i=1; i<65536; ++i)
+	for (int i=1; i<NAT_TABLE_LEN; ++i)
 		if (this->natTable[i].isFree())
 			return i;
 
@@ -209,13 +209,40 @@ string NATRouter::getWanNetwork()
  */
 int NATRouter::getAllocatedPort(string srcIp, int srcPort)
 {
-	for (int i=1; i<65536; ++i)
+	for (int i=1; i<NAT_TABLE_LEN; ++i)
 		if (this->natTable[i].getIp() == srcIp && this->natTable[i].getPort() == srcPort)
 			return i;
 
 	return -1;	// nic nie znaleziono
 }
 
+void NATRouter::freePorts()
+{
+	stringstream ss;
+	int i, ports;
+
+	Log portsLog;
+	string name = "NAT";
+	portsLog.setLogParams(10, BLUE, "\t\t");
+	portsLog.setObjectName(&name);
+
+	while(true)
+	{
+		ports = 0;
+		ss.str("");
+
+		for (i=1; i<NAT_TABLE_LEN; ++i)
+			if (this->natTable[i].isFree())
+				++ports;
+
+		ss << "Free:\t" << ports << "\t\tReserved:\t" << (NAT_TABLE_LEN-ports-1); // poprawka na nieuzywany port 0
+
+		portsLog.print(ss.str());
+		portsLog.delay();
+	}
+
+}
+
 string NATRouter::getWanGatewayIp()
 {
 	return this->netWanConf.gatewayIp;
diff --git a/NATRouter.h b/NATRouter.h
index 6f02544..1865869 100644
--- a/NATRouter.h
+++ b/NATRouter.h
@@ -29,7 +29,9 @@ public:
 	NATRouter(string hostname, string ip, string mask);
 	NATRouter(string hostname, string ip, string mask, string gatewayIp);
 	~NATRouter();
+
 	virtual void onRecv();
+	void freePorts();
 
 	// settery
 	void setWanIp(string wanIp);
@@ -42,4 +44,7 @@ public:
 	string getWanNetwork();
 	string getWanGatewayIp();
 };
+
+#define NAT_TABLE_LEN 65536
+
 #endif /* NATROUTER_H_ */
diff --git a/Simulation.cpp b/Simulation.cpp
index def2726..a70c43c 100644
--- a/Simulation.cpp
+++ b/Simulation.cpp
@@ -129,6 +129,9 @@ void * Simulation::threadWrapper(void * context)
 		case SIM_RESIZE:
 		    ((Simulation *)params->context)->resizeWnd();
 		    break;
+		case NAT_FP:
+			((NATRouter *)params->context)->freePorts();
+			break;
 	}
 	return 0;
 }
@@ -239,6 +242,7 @@ void Simulation::p2pSimulation()
 	sleep(3);
 	this->createThread("p1", NODE_RECV, &seed);
 	this->createThread("p2", NODE_RECV, &peer);
+	this->createThread("nat", NAT_FP, &r1);
 
 	while(true);
 }
diff --git a/Simulation.h b/Simulation.h
index 142e18a..df050b3 100644
--- a/Simulation.h
+++ b/Simulation.h
@@ -16,6 +16,7 @@ enum THREAD_TYPE
 	NODE_RECV,
 	SIM_TIMER,
 	SIM_RESIZE,
+	NAT_FP,
 };
 
 struct threadParams