diff --git a/weed-fs/src/cmd/weed/master.go b/weed-fs/src/cmd/weed/master.go
index 757ed7ce1..f65681e48 100644
--- a/weed-fs/src/cmd/weed/master.go
+++ b/weed-fs/src/cmd/weed/master.go
@@ -32,7 +32,7 @@ var (
 	capacity          = cmdMaster.Flag.Int("capacity", 100, "maximum number of volumes to hold")
 	volumeSizeLimitMB = cmdMaster.Flag.Uint("volumeSizeLimitMB", 32*1024, "Default Volume Size in MegaBytes")
 	mpulse            = cmdMaster.Flag.Int("pulseSeconds", 5, "number of seconds between heartbeats")
-	confFile          = cmdMaster.Flag.String("conf", "/etc/weed.conf", "xml configuration file")
+	confFile          = cmdMaster.Flag.String("conf", "/etc/weedfs/weedfs.conf", "xml configuration file")
 	defaultRepType    = cmdMaster.Flag.String("defaultReplicationType", "00", "Default replication type if not specified.")
 )
 
@@ -51,7 +51,7 @@ func dirLookupHandler(w http.ResponseWriter, r *http.Request) {
 		if machines != nil {
 			ret := []map[string]string{}
 			for _, dn := range *machines {
-				ret = append(ret, map[string]string{"url": dn.Ip + strconv.Itoa(dn.Port), "publicUrl": dn.PublicUrl})
+				ret = append(ret, map[string]string{"url": dn.Url(), "publicUrl":dn.PublicUrl})
 			}
 			writeJson(w, r, map[string]interface{}{"locations": ret})
 		} else {
@@ -83,14 +83,17 @@ func dirAssignHandler(w http.ResponseWriter, r *http.Request) {
 	}
 	fid, count, dn, err := topo.PickForWrite(rt, c)
 	if err == nil {
-		writeJson(w, r, map[string]interface{}{"fid": fid, "url": dn.Ip + ":" + strconv.Itoa(dn.Port), "publicUrl": dn.PublicUrl, "count": count})
+		writeJson(w, r, map[string]interface{}{"fid": fid, "url": dn.Url(), "count": count})
 	} else {
 		writeJson(w, r, map[string]string{"error": err.Error()})
 	}
 }
 
 func dirJoinHandler(w http.ResponseWriter, r *http.Request) {
-	ip := r.RemoteAddr[0:strings.Index(r.RemoteAddr, ":")]
+  ip := r.FormValue("ip")
+  if ip == ""{
+    ip = r.RemoteAddr[0:strings.Index(r.RemoteAddr, ":")]
+  }
 	port, _ := strconv.Atoi(r.FormValue("port"))
 	maxVolumeCount, _ := strconv.Atoi(r.FormValue("maxVolumeCount"))
 	s := r.RemoteAddr[0:strings.Index(r.RemoteAddr, ":")+1] + r.FormValue("port")
diff --git a/weed-fs/src/cmd/weed/volume.go b/weed-fs/src/cmd/weed/volume.go
index 785a5750b..6a5bd4fc4 100644
--- a/weed-fs/src/cmd/weed/volume.go
+++ b/weed-fs/src/cmd/weed/volume.go
@@ -20,7 +20,7 @@ func init() {
 }
 
 var cmdVolume = &Command{
-	UsageLine: "volume -port=8080 -dir=/tmp -max=5 -publicUrl=server_name:8080 -mserver=localhost:9333",
+	UsageLine: "volume -port=8080 -dir=/tmp -max=5 -ip=server_name -mserver=localhost:9333",
 	Short:     "start a volume server",
 	Long: `start a volume server to provide storage spaces
 
@@ -30,7 +30,8 @@ var cmdVolume = &Command{
 var (
 	vport          = cmdVolume.Flag.Int("port", 8080, "http listen port")
 	volumeFolder   = cmdVolume.Flag.String("dir", "/tmp", "directory to store data files")
-	publicUrl      = cmdVolume.Flag.String("publicUrl", "localhost:8080", "public url to serve data read")
+	ip             = cmdVolume.Flag.String("ip", "", "ip or server name")
+	publicUrl      = cmdVolume.Flag.String("publicUrl", "", "Publicly accessible <ip|server_name>:<port>")
 	masterNode     = cmdVolume.Flag.String("mserver", "localhost:9333", "master server location")
 	vpulse         = cmdVolume.Flag.Int("pulseSeconds", 5, "number of seconds between heartbeats")
 	maxVolumeCount = cmdVolume.Flag.Int("max", 5, "maximum number of volumes")
@@ -137,11 +138,11 @@ func PostHandler(w http.ResponseWriter, r *http.Request) {
 					if lookupResult, lookupErr := operation.Lookup(*server, volumeId); lookupErr == nil {
 						sendFunc := func(background bool) {
 							postContentFunc := func(location operation.Location) bool {
-								operation.Upload("http://"+location.PublicUrl+r.URL.Path+"?type=standard", filename, bytes.NewReader(needle.Data))
+								operation.Upload("http://"+location.Url+r.URL.Path+"?type=standard", filename, bytes.NewReader(needle.Data))
 								return true
 							}
 							for _, location := range lookupResult.Locations {
-								if location.PublicUrl != *publicUrl {
+								if location.Url != (*ip+":"+strconv.Itoa(*vport)) {
 									if background {
 										go postContentFunc(location)
 									} else {
@@ -228,7 +229,7 @@ func runVolume(cmd *Command, args []string) bool {
 	perm := fileInfo.Mode().Perm()
 	log.Println("Volume Folder permission:", perm)
 
-	store = storage.NewStore(*vport, *publicUrl, *volumeFolder, *maxVolumeCount)
+	store = storage.NewStore(*vport, *ip, *publicUrl, *volumeFolder, *maxVolumeCount)
 	defer store.Close()
 	http.HandleFunc("/", storeHandler)
 	http.HandleFunc("/status", statusHandler)
@@ -242,7 +243,7 @@ func runVolume(cmd *Command, args []string) bool {
 	}()
 	log.Println("store joined at", *masterNode)
 
-	log.Println("Start storage service at http://127.0.0.1:"+strconv.Itoa(*vport), "public url", *publicUrl)
+	log.Println("Start storage service at http://"+*ip+":"+strconv.Itoa(*vport))
 	e := http.ListenAndServe(":"+strconv.Itoa(*vport), nil)
 	if e != nil {
 		log.Fatalf("Fail to start:%s", e.Error())
diff --git a/weed-fs/src/pkg/operation/allocate_volume.go b/weed-fs/src/pkg/operation/allocate_volume.go
index 771ec40eb..6a3512896 100644
--- a/weed-fs/src/pkg/operation/allocate_volume.go
+++ b/weed-fs/src/pkg/operation/allocate_volume.go
@@ -7,7 +7,6 @@ import (
   "pkg/storage"
   "pkg/topology"
   "pkg/util"
-  "strconv"
 )
 
 type AllocateVolumeResult struct {
@@ -18,7 +17,7 @@ func AllocateVolume(dn *topology.DataNode, vid storage.VolumeId, repType storage
   values := make(url.Values)
   values.Add("volume", vid.String())
   values.Add("replicationType", repType.String())
-  jsonBlob, err := util.Post("http://"+dn.Ip+":"+strconv.Itoa(dn.Port)+"/admin/assign_volume", values)
+  jsonBlob, err := util.Post("http://"+dn.Url()+"/admin/assign_volume", values)
   if err != nil {
     return err
   }
diff --git a/weed-fs/src/pkg/operation/lookup_volume_id.go b/weed-fs/src/pkg/operation/lookup_volume_id.go
index 720286c31..c46c6670e 100644
--- a/weed-fs/src/pkg/operation/lookup_volume_id.go
+++ b/weed-fs/src/pkg/operation/lookup_volume_id.go
@@ -11,7 +11,7 @@ import (
 
 type Location struct {
   Url       string "url"
-  PublicUrl string "publicUrl"
+  PublicUrl       string "publicUrl"
 }
 type LookupResult struct {
   Locations []Location "locations"
diff --git a/weed-fs/src/pkg/storage/store.go b/weed-fs/src/pkg/storage/store.go
index 9e7bed192..b8337d51f 100644
--- a/weed-fs/src/pkg/storage/store.go
+++ b/weed-fs/src/pkg/storage/store.go
@@ -15,23 +15,24 @@ type Store struct {
 	volumes        map[VolumeId]*Volume
 	dir            string
 	Port           int
+	Ip             string
 	PublicUrl      string
 	MaxVolumeCount int
 }
 
-func NewStore(port int, publicUrl, dirname string, maxVolumeCount int) (s *Store) {
-	s = &Store{Port: port, PublicUrl: publicUrl, dir: dirname, MaxVolumeCount: maxVolumeCount}
+func NewStore(port int, ip, publicUrl, dirname string, maxVolumeCount int) (s *Store) {
+	s = &Store{Port: port, Ip: ip, PublicUrl: publicUrl, dir: dirname, MaxVolumeCount: maxVolumeCount}
 	s.volumes = make(map[VolumeId]*Volume)
 	s.loadExistingVolumes()
 
 	log.Println("Store started on dir:", dirname, "with", len(s.volumes), "volumes")
 	return
 }
-func (s *Store) AddVolume(volumeListString string, replicationType string) (error) {
-  rt, e := NewReplicationType(replicationType)
-  if e!=nil {
-    return e
-  }
+func (s *Store) AddVolume(volumeListString string, replicationType string) error {
+	rt, e := NewReplicationType(replicationType)
+	if e != nil {
+		return e
+	}
 	for _, range_string := range strings.Split(volumeListString, ",") {
 		if strings.Index(range_string, "-") < 0 {
 			id_string := range_string
@@ -103,6 +104,7 @@ func (s *Store) Join(mserver string) error {
 	bytes, _ := json.Marshal(stats)
 	values := make(url.Values)
 	values.Add("port", strconv.Itoa(s.Port))
+	values.Add("ip", s.Ip)
 	values.Add("publicUrl", s.PublicUrl)
 	values.Add("volumes", string(bytes))
 	values.Add("maxVolumeCount", strconv.Itoa(s.MaxVolumeCount))
@@ -133,10 +135,10 @@ func (s *Store) Read(i VolumeId, n *Needle) (int, error) {
 	return 0, errors.New("Not Found")
 }
 func (s *Store) GetVolume(i VolumeId) *Volume {
-  return s.volumes[i]
+	return s.volumes[i]
 }
 
 func (s *Store) HasVolume(i VolumeId) bool {
-  _, ok := s.volumes[i]
-  return ok
+	_, ok := s.volumes[i]
+	return ok
 }
diff --git a/weed-fs/src/pkg/topology/data_node.go b/weed-fs/src/pkg/topology/data_node.go
index cfdae45c3..0410df5f6 100644
--- a/weed-fs/src/pkg/topology/data_node.go
+++ b/weed-fs/src/pkg/topology/data_node.go
@@ -3,6 +3,7 @@ package topology
 import (
 	_ "fmt"
 	"pkg/storage"
+	"strconv"
 )
 
 type DataNode struct {
@@ -43,11 +44,13 @@ func (dn *DataNode) GetTopology() *Topology {
 func (dn *DataNode) MatchLocation(ip string, port int) bool {
 	return dn.Ip == ip && dn.Port == port
 }
+func (dn *DataNode) Url() string {
+  return dn.Ip + strconv.Itoa(dn.Port)
+}
 
 func (dn *DataNode) ToMap() interface{} {
 	ret := make(map[string]interface{})
-	ret["Ip"] = dn.Ip
-	ret["Port"] = dn.Port
+	ret["Url"] = dn.Url()
 	ret["Volumes"] = dn.GetActiveVolumeCount()
 	ret["Max"] = dn.GetMaxVolumeCount()
 	ret["Free"] = dn.FreeSpace()
diff --git a/weed-fs/src/pkg/util/post.go b/weed-fs/src/pkg/util/post.go
index 357b42185..f643faa6b 100644
--- a/weed-fs/src/pkg/util/post.go
+++ b/weed-fs/src/pkg/util/post.go
@@ -10,13 +10,13 @@ import (
 func Post(url string, values url.Values) ([]byte, error) {
 	r, err := http.PostForm(url, values)
 	if err != nil {
-		log.Println("post:", err)
+		log.Println("post to", url, err)
 		return nil, err
 	}
 	defer r.Body.Close()
 	b, err := ioutil.ReadAll(r.Body)
 	if err != nil {
-		log.Println("post:", err)
+    log.Println("read post result from", url, err)
 		return nil, err
 	}
 	return b, nil