diff --git a/daemon/UPnP.cpp b/daemon/UPnP.cpp
index 7885578e..b1f698c1 100644
--- a/daemon/UPnP.cpp
+++ b/daemon/UPnP.cpp
@@ -122,7 +122,7 @@ namespace transport
 		err = UPNP_GetValidIGD (m_Devlist, &m_upnpUrls, &m_upnpData, m_NetworkAddr, sizeof (m_NetworkAddr));
 #endif
 		m_upnpUrlsInitialized=err!=0;
-		if (err == UPNP_IGD_VALID_CONNECTED)
+		if (err == UPNP_IGD_VALID_CONNECTED || err == UPNP_IGD_VALID_NOT_CONNECTED)
 		{
 #if (MINIUPNPC_API_VERSION < 18)
 			err = UPNP_GetExternalIPAddress (m_upnpUrls.controlURL, m_upnpData.first.servicetype, m_externalIPAddress);
diff --git a/debian/changelog b/debian/changelog
index 0fe779da..fd7b8d57 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -2,7 +2,7 @@ i2pd (2.54.0-1) unstable; urgency=medium
 
   * updated to version 2.54.0/0.9.64
 
--- orignal <orignal@i2pmail.org>  Sun, 6 Oct 2024 16:00:00 +0000
+ -- orignal <orignal@i2pmail.org>  Sun, 6 Oct 2024 16:00:00 +0000
 
 i2pd (2.53.1-1) unstable; urgency=medium
 
diff --git a/libi2pd/SSU2Session.cpp b/libi2pd/SSU2Session.cpp
index aba8195e..96f38217 100644
--- a/libi2pd/SSU2Session.cpp
+++ b/libi2pd/SSU2Session.cpp
@@ -337,13 +337,14 @@ namespace transport
 		SetTerminationTimeout (SSU2_TERMINATION_TIMEOUT);
 		SendQueue ();
 		transports.PeerConnected (shared_from_this ());
+		
+		LogPrint(eLogDebug, "SSU2: Session with ", GetRemoteEndpoint (),
+			" (", i2p::data::GetIdentHashAbbreviation (GetRemoteIdentity ()->GetIdentHash ()), ") established");
 		if (m_OnEstablished)
 		{
 			m_OnEstablished ();
 			m_OnEstablished = nullptr;
 		}
-		LogPrint(eLogDebug, "SSU2: Session with ", GetRemoteEndpoint (),
-			" (", i2p::data::GetIdentHashAbbreviation (GetRemoteIdentity ()->GetIdentHash ()), ") established");
 	}
 
 	void SSU2Session::Done ()
@@ -1944,21 +1945,28 @@ namespace transport
 	void SSU2Session::HandleRelayRequest (const uint8_t * buf, size_t len)
 	{
 		// we are Bob
+		auto mts = i2p::util::GetMillisecondsSinceEpoch ();
+		uint32_t nonce = bufbe32toh (buf + 1); // nonce
 		uint32_t relayTag = bufbe32toh (buf + 5); // relay tag
 		auto session = m_Server.FindRelaySession (relayTag);
 		if (!session)
 		{
 			LogPrint (eLogWarning, "SSU2: RelayRequest session with relay tag ", relayTag, " not found");
 			// send relay response back to Alice
-			uint8_t payload[SSU2_MAX_PACKET_SIZE];
-			size_t payloadSize = CreateRelayResponseBlock (payload, m_MaxPayloadSize,
-				eSSU2RelayResponseCodeBobRelayTagNotFound, bufbe32toh (buf + 1), 0, false);
-			payloadSize += CreatePaddingBlock (payload + payloadSize, m_MaxPayloadSize - payloadSize);
-			SendData (payload, payloadSize);
+			auto packet = m_Server.GetSentPacketsPool ().AcquireShared ();
+			packet->payloadSize = CreateAckBlock (packet->payload, m_MaxPayloadSize);
+			packet->payloadSize += CreateRelayResponseBlock (packet->payload + packet->payloadSize, m_MaxPayloadSize - packet->payloadSize,
+				eSSU2RelayResponseCodeBobRelayTagNotFound, nonce, 0, false);
+			packet->payloadSize += CreatePaddingBlock (packet->payload + packet->payloadSize, m_MaxPayloadSize - packet->payloadSize);
+			uint32_t packetNum = SendData (packet->payload, packet->payloadSize);
+			if (m_RemoteVersion >= SSU2_MIN_RELAY_RESPONSE_RESEND_VERSION)
+			{	
+				// sometimes Alice doesn't ack this RelayResponse in older versions
+				packet->sendTime = mts;
+				m_SentPackets.emplace (packetNum, packet);
+			}	
 			return;
 		}
-		auto mts = i2p::util::GetMillisecondsSinceEpoch ();
-		uint32_t nonce = bufbe32toh (buf + 1);
 		if (session->m_RelaySessions.emplace (nonce, std::make_pair (shared_from_this (), mts/1000)).second)
 		{
 			// send relay intro to Charlie
diff --git a/libi2pd/Transports.cpp b/libi2pd/Transports.cpp
index 6b695371..b07b1b0b 100644
--- a/libi2pd/Transports.cpp
+++ b/libi2pd/Transports.cpp
@@ -25,7 +25,7 @@ namespace transport
 {
 	template<typename Keys>
 	EphemeralKeysSupplier<Keys>::EphemeralKeysSupplier (int size):
-		m_QueueSize (size), m_IsRunning (false), m_Thread (nullptr)
+		m_QueueSize (size), m_IsRunning (false)
 	{
 	}
 
@@ -39,7 +39,7 @@ namespace transport
 	void EphemeralKeysSupplier<Keys>::Start ()
 	{
 		m_IsRunning = true;
-		m_Thread = new std::thread (std::bind (&EphemeralKeysSupplier<Keys>::Run, this));
+		m_Thread.reset (new std::thread (std::bind (&EphemeralKeysSupplier<Keys>::Run, this)));
 	}
 
 	template<typename Keys>
@@ -53,8 +53,7 @@ namespace transport
 		if (m_Thread)
 		{
 			m_Thread->join ();
-			delete m_Thread;
-			m_Thread = 0;
+			m_Thread = nullptr;
 		}
 	}
 
@@ -78,6 +77,7 @@ namespace transport
 			}
 			else
 			{
+				m_KeysPool.CleanUpMt ();
 				std::unique_lock<std::mutex> l(m_AcquiredMutex);
 				if (!m_IsRunning) break;
 				m_Acquired.wait (l); // wait for element gets acquired
@@ -92,7 +92,7 @@ namespace transport
 		{
 			for (int i = 0; i < num; i++)
 			{
-				auto pair = std::make_shared<Keys> ();
+				auto pair = m_KeysPool.AcquireSharedMt ();
 				pair->GenerateKeys ();
 				std::unique_lock<std::mutex> l(m_AcquiredMutex);
 				m_Queue.push (pair);
@@ -114,7 +114,7 @@ namespace transport
 			}
 		}
 		// queue is empty, create new
-		auto pair = std::make_shared<Keys> ();
+		auto pair = m_KeysPool.AcquireSharedMt ();
 		pair->GenerateKeys ();
 		return pair;
 	}
diff --git a/libi2pd/Transports.h b/libi2pd/Transports.h
index c7eb7677..8271108d 100644
--- a/libi2pd/Transports.h
+++ b/libi2pd/Transports.h
@@ -26,6 +26,7 @@
 #include "RouterInfo.h"
 #include "I2NPProtocol.h"
 #include "Identity.h"
+#include "util.h"
 
 namespace i2p
 {
@@ -53,9 +54,10 @@ namespace transport
 
 			const int m_QueueSize;
 			std::queue<std::shared_ptr<Keys> > m_Queue;
+			i2p::util::MemoryPoolMt<Keys> m_KeysPool;
 
 			bool m_IsRunning;
-			std::thread * m_Thread;
+			std::unique_ptr<std::thread> m_Thread;
 			std::condition_variable m_Acquired;
 			std::mutex m_AcquiredMutex;
 	};