diff --git a/config/config.go b/config/config.go
index d9d4ae8..b793e43 100644
--- a/config/config.go
+++ b/config/config.go
@@ -19,7 +19,7 @@ import (
 // package.
 type Config struct {
 	Workspace   string
-	ListenAddrs []ma.Multiaddr
+	ListenAddrs ma.Multiaddr
 	ConnManager connmgr.ConnManager
 }
 
diff --git a/core/node.go b/core/node.go
index 8c02a3e..2d347ea 100644
--- a/core/node.go
+++ b/core/node.go
@@ -11,6 +11,7 @@ import (
 	"context"
 	"crypto/rand"
 	"errors"
+	"fmt"
 	"log"
 	"os"
 	"path/filepath"
@@ -48,6 +49,7 @@ type Node struct {
 	host           host.Host // lib-p2p host
 	workspace      string    // data
 	privatekeyPath string
+	multiaddr      string
 }
 
 // NewBasicNode constructs a new *Node
@@ -57,7 +59,7 @@ type Node struct {
 //	  privatekeypath: private key file
 //		  If it's empty, automatically created in the program working directory
 //		  If it's a directory, it will be created in the specified directory
-func NewBasicNode(multiaddr []ma.Multiaddr, workspace string, privatekeypath string) (*Node, error) {
+func NewBasicNode(multiaddr ma.Multiaddr, workspace string, privatekeypath string) (*Node, error) {
 	if multiaddr == nil || workspace == "" {
 		return nil, errors.New("invalid parameter")
 	}
@@ -68,7 +70,7 @@ func NewBasicNode(multiaddr []ma.Multiaddr, workspace string, privatekeypath str
 	}
 
 	host, err := libp2p.New(
-		libp2p.ListenAddrs(multiaddr...),
+		libp2p.ListenAddrs(multiaddr),
 		libp2p.Identity(prvKey),
 		yamuxOpt,
 		mplexOpt,
@@ -86,6 +88,7 @@ func NewBasicNode(multiaddr []ma.Multiaddr, workspace string, privatekeypath str
 		host:           host,
 		workspace:      workspace,
 		privatekeyPath: privatekeypath,
+		multiaddr:      fmt.Sprintf("%s/p2p/%s", multiaddr.String(), host.ID()),
 	}
 	return n, nil
 }
@@ -127,6 +130,10 @@ func (n Node) Workspace() string {
 	return n.workspace
 }
 
+func (n Node) Multiaddr() string {
+	return n.multiaddr
+}
+
 func (n Node) ID() peer.ID {
 	return n.host.ID()
 }
diff --git a/defaults.go b/defaults.go
index 422124e..479a628 100644
--- a/defaults.go
+++ b/defaults.go
@@ -11,24 +11,13 @@ import (
 	"os"
 
 	"github.com/libp2p/go-libp2p/p2p/net/connmgr"
-	"github.com/multiformats/go-multiaddr"
 )
 
 // DefaultListenAddrs configures libp2p to use default listen address.
 var DefaultListenAddrs = func(cfg *Config) error {
-	addrs := []string{
-		"/ip4/0.0.0.0/tcp/0",
-		"/ip6/::/tcp/0",
-	}
-	listenAddrs := make([]multiaddr.Multiaddr, 0, len(addrs))
-	for _, s := range addrs {
-		addr, err := multiaddr.NewMultiaddr(s)
-		if err != nil {
-			return err
-		}
-		listenAddrs = append(listenAddrs, addr)
-	}
-	return cfg.Apply(ListenAddrs(listenAddrs...))
+	ip := "0.0.0.0"
+	port := 80
+	return cfg.Apply(ListenAddrStrings(ip, port))
 }
 
 // DefaultListenAddrs configures libp2p to use default listen address.
diff --git a/examples/readfile/example_readfile.go b/examples/readfile/example_readfile.go
index 1f819fa..1f53d8d 100644
--- a/examples/readfile/example_readfile.go
+++ b/examples/readfile/example_readfile.go
@@ -28,9 +28,7 @@ func main() {
 	// To construct a simple host with all the default settings, just use `New`
 	h1, err := p2pgo.New(
 		".private1",
-		p2pgo.ListenAddrStrings(
-			fmt.Sprintf("/ip4/0.0.0.0/tcp/%d", *sourcePort1), // regular tcp connections
-		),
+		p2pgo.ListenAddrStrings("0.0.0.0", *sourcePort1), // regular tcp connections
 	)
 	if err != nil {
 		panic(err)
@@ -42,9 +40,7 @@ func main() {
 	// To construct a simple host with all the default settings, just use `New`
 	h2, err := p2pgo.New(
 		".private2",
-		p2pgo.ListenAddrStrings(
-			fmt.Sprintf("/ip4/0.0.0.0/tcp/%d", *sourcePort2), // regular tcp connections
-		),
+		p2pgo.ListenAddrStrings("0.0.0.0", *sourcePort2), // regular tcp connections
 	)
 	if err != nil {
 		panic(err)
diff --git a/examples/writefile/example_writefile.go b/examples/writefile/example_writefile.go
index faaab83..1cfa76f 100644
--- a/examples/writefile/example_writefile.go
+++ b/examples/writefile/example_writefile.go
@@ -28,9 +28,7 @@ func main() {
 	// To construct a simple host with all the default settings, just use `New`
 	h1, err := p2pgo.New(
 		".private1",
-		p2pgo.ListenAddrStrings(
-			fmt.Sprintf("/ip4/0.0.0.0/tcp/%d", *sourcePort1), // regular tcp connections
-		),
+		p2pgo.ListenAddrStrings("0.0.0.0", *sourcePort1), // regular tcp connections
 	)
 	if err != nil {
 		panic(err)
@@ -42,9 +40,7 @@ func main() {
 	// To construct a simple host with all the default settings, just use `New`
 	h2, err := p2pgo.New(
 		".private2",
-		p2pgo.ListenAddrStrings(
-			fmt.Sprintf("/ip4/0.0.0.0/tcp/%d", *sourcePort2), // regular tcp connections
-		),
+		p2pgo.ListenAddrStrings("0.0.0.0", *sourcePort2), // regular tcp connections
 	)
 	if err != nil {
 		panic(err)
diff --git a/options.go b/options.go
index c3042f6..5429acf 100644
--- a/options.go
+++ b/options.go
@@ -16,23 +16,21 @@ import (
 
 // ListenAddrStrings configures libp2p to listen on the given (unparsed)
 // addresses.
-func ListenAddrStrings(s ...string) Option {
+func ListenAddrStrings(ip string, port int) Option {
 	return func(cfg *Config) error {
-		for _, addrstr := range s {
-			a, err := ma.NewMultiaddr(addrstr)
-			if err != nil {
-				return err
-			}
-			cfg.ListenAddrs = append(cfg.ListenAddrs, a)
+		a, err := ma.NewMultiaddr(fmt.Sprintf("/ip4/%s/tcp/%d", ip, port))
+		if err != nil {
+			return err
 		}
+		cfg.ListenAddrs = a
 		return nil
 	}
 }
 
 // ListenAddrs configures libp2p to listen on the given addresses.
-func ListenAddrs(addrs ...ma.Multiaddr) Option {
+func ListenAddrs(addrs ma.Multiaddr) Option {
 	return func(cfg *Config) error {
-		cfg.ListenAddrs = append(cfg.ListenAddrs, addrs...)
+		cfg.ListenAddrs = addrs
 		return nil
 	}
 }