diff --git a/handlers/new_instance.go b/handlers/new_instance.go
index 75fe7cc..940f352 100644
--- a/handlers/new_instance.go
+++ b/handlers/new_instance.go
@@ -16,7 +16,7 @@ func NewInstance(rw http.ResponseWriter, req *http.Request) {
 	vars := mux.Vars(req)
 	sessionId := vars["sessionId"]
 
-	body := types.InstanceConfig{Host: req.Host}
+	body := types.InstanceConfig{PlaygroundFQDN: req.Host}
 
 	json.NewDecoder(req.Body).Decode(&body)
 
diff --git a/handlers/session_setup.go b/handlers/session_setup.go
index b5b9913..28799fe 100644
--- a/handlers/session_setup.go
+++ b/handlers/session_setup.go
@@ -13,7 +13,7 @@ func SessionSetup(rw http.ResponseWriter, req *http.Request) {
 	vars := mux.Vars(req)
 	sessionId := vars["sessionId"]
 
-	body := pwd.SessionSetupConf{}
+	body := pwd.SessionSetupConf{PlaygroundFQDN: req.Host}
 
 	json.NewDecoder(req.Body).Decode(&body)
 
diff --git a/provisioner/dind.go b/provisioner/dind.go
index 1c8ae36..c331adc 100644
--- a/provisioner/dind.go
+++ b/provisioner/dind.go
@@ -67,7 +67,7 @@ func (d *DinD) InstanceNew(session *types.Session, conf types.InstanceConfig) (*
 		ServerCert:    conf.ServerCert,
 		ServerKey:     conf.ServerKey,
 		CACert:        conf.CACert,
-		HostFQDN:      conf.Host,
+		HostFQDN:      conf.PlaygroundFQDN,
 		Privileged:    true,
 		Networks:      []string{session.Id},
 	}
diff --git a/pwd/instance_test.go b/pwd/instance_test.go
index d9ac692..3fc54cb 100644
--- a/pwd/instance_test.go
+++ b/pwd/instance_test.go
@@ -97,7 +97,7 @@ func TestInstanceNew(t *testing.T) {
 	_s.On("InstancePut", mock.AnythingOfType("*types.Instance")).Return(nil)
 	_e.M.On("Emit", event.INSTANCE_NEW, "aaaabbbbcccc", []interface{}{"aaaabbbb_node1", "10.0.0.1", "node1", "ip10-0-0-1-aaaabbbbcccc"}).Return()
 
-	instance, err := p.InstanceNew(session, types.InstanceConfig{Host: "something.play-with-docker.com"})
+	instance, err := p.InstanceNew(session, types.InstanceConfig{PlaygroundFQDN: "something.play-with-docker.com"})
 	assert.Nil(t, err)
 
 	assert.Equal(t, expectedInstance, *instance)
diff --git a/pwd/session.go b/pwd/session.go
index f853d51..bb7fe48 100644
--- a/pwd/session.go
+++ b/pwd/session.go
@@ -30,7 +30,8 @@ func (s *sessionBuilderWriter) Write(p []byte) (n int, err error) {
 }
 
 type SessionSetupConf struct {
-	Instances []SessionSetupInstanceConf `json:"instances"`
+	Instances      []SessionSetupInstanceConf `json:"instances"`
+	PlaygroundFQDN string
 }
 
 type SessionSetupInstanceConf struct {
@@ -150,7 +151,7 @@ func (p *pwd) SessionDeployStack(s *types.Session) error {
 
 	s.Ready = false
 	p.event.Emit(event.SESSION_READY, s.Id, false)
-	i, err := p.InstanceNew(s, types.InstanceConfig{ImageName: s.ImageName, Host: s.Host})
+	i, err := p.InstanceNew(s, types.InstanceConfig{ImageName: s.ImageName, PlaygroundFQDN: s.Host})
 	if err != nil {
 		log.Printf("Error creating instance for stack [%s]: %s\n", s.Stack, err)
 		return err
@@ -203,7 +204,7 @@ func (p *pwd) SessionGet(sessionId string) *types.Session {
 	return s
 }
 
-func (p *pwd) SessionSetup(session *types.Session, conf SessionSetupConf) error {
+func (p *pwd) SessionSetup(session *types.Session, sconf SessionSetupConf) error {
 	defer observeAction("SessionSetup", time.Now())
 
 	c := sync.NewCond(&sync.Mutex{})
@@ -222,14 +223,14 @@ func (p *pwd) SessionSetup(session *types.Session, conf SessionSetupConf) error
 
 	g, _ := errgroup.WithContext(context.Background())
 
-	for _, conf := range conf.Instances {
+	for _, conf := range sconf.Instances {
 		conf := conf
 		g.Go(func() error {
 			instanceConf := types.InstanceConfig{
-				ImageName: conf.Image,
-				Hostname:  conf.Hostname,
-				Host:      session.Host,
-				Type:      conf.Type,
+				ImageName:      conf.Image,
+				Hostname:       conf.Hostname,
+				PlaygroundFQDN: sconf.PlaygroundFQDN,
+				Type:           conf.Type,
 			}
 			i, err := p.InstanceNew(session, instanceConf)
 			if err != nil {
diff --git a/pwd/types/instance.go b/pwd/types/instance.go
index 160d324..a4a5380 100644
--- a/pwd/types/instance.go
+++ b/pwd/types/instance.go
@@ -27,13 +27,13 @@ type WindowsInstance struct {
 }
 
 type InstanceConfig struct {
-	ImageName  string
-	Hostname   string
-	ServerCert []byte
-	ServerKey  []byte
-	CACert     []byte
-	Cert       []byte
-	Key        []byte
-	Host       string
-	Type       string
+	ImageName      string
+	Hostname       string
+	ServerCert     []byte
+	ServerKey      []byte
+	CACert         []byte
+	Cert           []byte
+	Key            []byte
+	PlaygroundFQDN string
+	Type           string
 }