diff --git a/libraries/shared/src/DomainInfo.cpp b/libraries/shared/src/DomainInfo.cpp
index 42337fae0d..f580ed4763 100644
--- a/libraries/shared/src/DomainInfo.cpp
+++ b/libraries/shared/src/DomainInfo.cpp
@@ -9,7 +9,10 @@
 #include "DomainInfo.h"
 
 DomainInfo::DomainInfo() :
-    _sockAddr(HifiSockAddr(QHostAddress::Null, DEFAULT_DOMAIN_SERVER_PORT))
+    _sockAddr(HifiSockAddr(QHostAddress::Null, DEFAULT_DOMAIN_SERVER_PORT)),
+    _requiresAuthentication(false),
+    _connectionSecret(),
+    _registrationToken()
 {
     
 }
@@ -52,9 +55,7 @@ void DomainInfo::completedHostnameLookup(const QHostInfo& hostInfo) {
             qDebug("DS at %s is at %s", _hostname.toLocal8Bit().constData(),
                    _sockAddr.getAddress().toString().toLocal8Bit().constData());
             return;
-        }
-        
-        
+        }        
     }
     
     // if we got here then we failed to lookup the address
diff --git a/libraries/shared/src/DomainInfo.h b/libraries/shared/src/DomainInfo.h
index 5d55f2333a..a0457796f2 100644
--- a/libraries/shared/src/DomainInfo.h
+++ b/libraries/shared/src/DomainInfo.h
@@ -10,6 +10,7 @@
 #define __hifi__DomainInfo__
 
 #include <QtCore/QObject>
+#include <QtCore/QUuid>
 #include <QtNetwork/QHostInfo>
 
 #include "HifiSockAddr.h"
@@ -32,6 +33,15 @@ public:
     void setSockAddr(const HifiSockAddr& sockAddr) { _sockAddr = sockAddr; }
     
     unsigned short getPort() const { return _sockAddr.getPort(); }
+    
+    bool requiresAuthentication() const { return _requiresAuthentication; }
+    void setRequiresAuthentication(bool requiresAuthentication) { _requiresAuthentication = requiresAuthentication; }
+    
+    const QUuid& getConnectionSecret() const { return _connectionSecret; }
+    void setConnectionSecret(const QUuid& connectionSecret) { _connectionSecret = connectionSecret; }
+    
+    const QString& getRegistrationToken() const { return _registrationToken; }
+    void setRegistrationToken(const QString& registrationToken);
 private slots:
     void completedHostnameLookup(const QHostInfo& hostInfo);
 signals:
@@ -39,6 +49,9 @@ signals:
 private:
     QString _hostname;
     HifiSockAddr _sockAddr;
+    bool _requiresAuthentication;
+    QUuid _connectionSecret;
+    QString _registrationToken;
 };
 
 #endif /* defined(__hifi__DomainInfo__) */
diff --git a/libraries/shared/src/NodeList.cpp b/libraries/shared/src/NodeList.cpp
index f68ffadc97..62e9d7e7f8 100644
--- a/libraries/shared/src/NodeList.cpp
+++ b/libraries/shared/src/NodeList.cpp
@@ -113,6 +113,17 @@ bool NodeList::packetVersionAndHashMatch(const QByteArray& packet) {
     return false;
 }
 
+qint64 NodeList::writeDatagram(const QByteArray& datagram, const HifiSockAddr& destinationSockAddr,
+                               const QUuid& connectionSecret) {
+    QByteArray datagramCopy = datagram;
+    
+    // setup the MD5 hash for source verification in the header
+    replaceHashInPacketGivenConnectionUUID(datagramCopy, connectionSecret);
+
+    return _nodeSocket.writeDatagram(datagramCopy, destinationSockAddr.getAddress(), destinationSockAddr.getPort());
+    
+}
+
 qint64 NodeList::writeDatagram(const QByteArray& datagram, const SharedNodePointer& destinationNode,
                                const HifiSockAddr& overridenSockAddr) {
     if (destinationNode) {
@@ -128,11 +139,7 @@ qint64 NodeList::writeDatagram(const QByteArray& datagram, const SharedNodePoint
             }
         }
         
-        QByteArray datagramCopy = datagram;
-        // setup the MD5 hash for source verification in the header
-        replaceHashInPacketGivenConnectionUUID(datagramCopy, destinationNode->getConnectionSecret());
-        
-        return _nodeSocket.writeDatagram(datagramCopy, destinationSockAddr->getAddress(), destinationSockAddr->getPort());
+        writeDatagram(datagram, *destinationSockAddr, destinationNode->getConnectionSecret());
     }
     
     // didn't have a destinationNode to send to, return 0
@@ -460,13 +467,19 @@ void NodeList::sendDomainServerCheckIn() {
         // we don't know our public socket and we need to send it to the domain server
         // send a STUN request to figure it out
         sendSTUNRequest();
-    } else if (!_domainInfo.getIP().isNull()) {
-        // construct the DS check in packet if we can
-
-        // check in packet has header, optional UUID, node type, port, IP, node types of interest, null termination
-        QByteArray domainServerPacket = byteArrayWithPopluatedHeader(PacketTypeDomainListRequest);
+    } else if (!_domainInfo.getIP().isNull()
+               && (!_domainInfo.requiresAuthentication()
+                   || !_sessionUUID.isNull()
+                   || !_domainInfo.getRegistrationToken().isEmpty()) ) {
+        // construct the DS check in packet
+        
+        PacketType domainPacketType = _domainInfo.getRegistrationToken().isEmpty()
+            ? PacketTypeDomainListRequest
+            : PacketTypeDomainConnectRequest;
+        
+        QByteArray domainServerPacket = byteArrayWithPopluatedHeader(domainPacketType);
         QDataStream packetStream(&domainServerPacket, QIODevice::Append);
-
+        
         // pack our data to send to the domain-server
         packetStream << _ownerType << _publicSockAddr
             << HifiSockAddr(QHostAddress(getHostOrderLocalAddress()), _nodeSocket.localPort())
@@ -477,7 +490,7 @@ void NodeList::sendDomainServerCheckIn() {
             packetStream << nodeTypeOfInterest;
         }
         
-        _nodeSocket.writeDatagram(domainServerPacket, _domainInfo.getIP(), _domainInfo.getPort());
+        writeDatagram(domainServerPacket, _domainInfo.getSockAddr(), _domainInfo.getConnectionSecret());
         const int NUM_DOMAIN_SERVER_CHECKINS_PER_STUN_REQUEST = 5;
         static unsigned int numDomainCheckins = 0;
 
diff --git a/libraries/shared/src/NodeList.h b/libraries/shared/src/NodeList.h
index 2629bd351a..5c90a869f4 100644
--- a/libraries/shared/src/NodeList.h
+++ b/libraries/shared/src/NodeList.h
@@ -139,6 +139,9 @@ private:
     void operator=(NodeList const&); // Don't implement, needed to avoid copies of singleton
     void sendSTUNRequest();
     void processSTUNResponse(const QByteArray& packet);
+    
+    qint64 NodeList::writeDatagram(const QByteArray& datagram, const HifiSockAddr& destinationSockAddr,
+                                   const QUuid& connectionSecret);
 
     NodeHash::iterator killNodeAtHashIterator(NodeHash::iterator& nodeItemToKill);