diff --git a/reflector/Makefile b/reflector/Makefile
index 86a9d26..3116642 100644
--- a/reflector/Makefile
+++ b/reflector/Makefile
@@ -27,9 +27,9 @@ DBUTIL = dbutil
 include urfd.mk
 
 ifeq ($(debug), true)
-CFLAGS = -ggdb3 -DDEBUG -W -Werror -std=c++11 -MMD -MD
+CFLAGS = -ggdb3 -DDEBUG -W -Werror -std=c++17 -MMD -MD
 else
-CFLAGS = -W -Werror -std=c++11 -MMD -MD
+CFLAGS = -W -Werror -std=c++17 -MMD -MD
 endif
 
 LDFLAGS=-pthread -lcurl
diff --git a/reflector/Reflector.h b/reflector/Reflector.h
index efe22ea..432ce68 100644
--- a/reflector/Reflector.h
+++ b/reflector/Reflector.h
@@ -27,6 +27,10 @@
 #include "PacketStream.h"
 #include "NotificationQueue.h"
 
+#ifndef NO_DHT
+#include "urfd-dht-values.h"
+#endif
+
 
 ////////////////////////////////////////////////////////////////////////////////////////
 // define
@@ -78,6 +82,15 @@ public:
 	void OnStreamOpen(const CCallsign &);
 	void OnStreamClose(const CCallsign &);
 
+#ifndef NO_DHT
+	// Publish DHT
+	void PutDHTConfig();
+	void PutDHTPeers();
+	void PutDHTClients();
+	void PutDHTUsers();
+	void GetDHTConfig(const std::string &cs);
+#endif
+
 protected:
 	// threads
 	void RouterThread(const char);
@@ -92,7 +105,6 @@ protected:
 	void WriteXmlFile(std::ofstream &);
 	void JsonReport(nlohmann::json &report);
 
-protected:
 	// identity
 	CCallsign   m_Callsign;
 	std::string m_Modules, m_TCmodules;
@@ -113,4 +125,12 @@ protected:
 
 	// notifications
 	CNotificationQueue  m_Notifications;
+
+#ifndef NO_DHT
+	// Distributed Hash Table
+	dht::DhtRunner node;
+	dht::InfoHash refhash;
+	unsigned int peers_put_count, clients_put_count, users_put_count;
+#endif
+
 };
diff --git a/reflector/urfd-dht-values.h b/reflector/urfd-dht-values.h
new file mode 100644
index 0000000..50a4438
--- /dev/null
+++ b/reflector/urfd-dht-values.h
@@ -0,0 +1,86 @@
+//  Copyright © 2023 Thomas A. Early, N7TAE
+//
+// ----------------------------------------------------------------------------
+//    This file is part of urfd.
+//
+//    M17Refd is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU General Public License as published by
+//    the Free Software Foundation, either version 3 of the License, or
+//    (at your option) any later version.
+//
+//    M17Refd is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//    GNU General Public License for more details.
+//
+//    You should have received a copy of the GNU General Public License
+//    with this software.  If not, see <http://www.gnu.org/licenses/>.
+// ----------------------------------------------------------------------------
+
+#pragma once
+
+#include <opendht.h>
+
+/* HELPERS */
+template<typename E> constexpr auto toUType(E enumerator) noexcept
+{
+	return static_cast<std::underlying_type_t<E>>(enumerator);
+} // Item #10 in "Effective Modern C++", by Scott Meyers, O'REILLY
+
+enum class EUrfdValueID : uint64_t { Config=1, Peers=2, Clients=3, Users=4 };
+
+/* PEERS */
+using PeerTuple = std::tuple<std::string, std::string, std::time_t>;
+enum class EUrfdPeerFields { Callsign, Modules, ConnectTime };
+struct SUrfdPeers0
+{
+	std::time_t timestamp;
+	unsigned int sequence;
+	std::list<PeerTuple> list;
+
+	MSGPACK_DEFINE(timestamp, sequence, list)
+};
+
+/* CLIENTS */
+using ClientTuple = std::tuple<std::string, std::string, char, std::time_t, std::time_t>;
+enum class EUrfdClientFields { Callsign, Ip, Module, ConnectTime, LastHeardTime };
+struct SUrfdClients0
+{
+	std::time_t timestamp;
+	unsigned int sequence;
+	std::list<ClientTuple> list;
+
+	MSGPACK_DEFINE(timestamp, sequence, list)
+};
+
+/* USERS */
+using UserTuple = std::tuple<std::string, std::string, std::string, std::time_t>;
+enum class EUrfdUserFields { Source, Destination, Reflector, LastHeardTime };
+struct SUrfdUsers0
+{
+	std::time_t timestamp;
+	unsigned int sequence;
+	std::list<UserTuple> list;
+
+	MSGPACK_DEFINE(timestamp, sequence, list)
+};
+
+/* CONFIGURATION */
+// 'SIZE' has to be last!!
+enum class EUrfdPorts : unsigned { dcs, dextra, dmrplus, dplus, m17, mmdvm, nxdn, p25, urf, usrprx, usrptx, ysf, SIZE };
+enum class EUrfdAlMod : unsigned { nxdn, p25, ysf, SIZE };
+enum class EUrfdTxRx  : unsigned { rx, tx, SIZE };
+enum class EUrfdRefId : unsigned { nxdn, p25, SIZE };
+struct SUrfdConfig0
+{
+	std::time_t timestamp;
+	std::string cs, ipv4, ipv6, mods, url, email, sponsor, country, version;
+	std::array<unsigned, toUType(EUrfdPorts::SIZE)> port;
+	std::array<char, toUType(EUrfdAlMod::SIZE)> almod;
+	std::array<unsigned long, toUType(EUrfdTxRx::SIZE)> ysffreq;
+	std::array<unsigned, toUType(EUrfdRefId::SIZE)> refid;
+	std::unordered_map<char, std::string> description;
+	bool g3enabled;
+
+	MSGPACK_DEFINE(timestamp, cs, ipv4, ipv6, mods, url, email, sponsor, country, version, almod, ysffreq, refid, g3enabled, port, description)
+};