diff --git a/.travis.yml b/.travis.yml
index 8322e02..1cb5a08 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,11 @@
 language: go
 go:
-    - 1.9.x
     - 1.10.x
     - 1.11.x
+    - 1.12.x
 before_install:
+    - sudo apt update
+    - sudo apt install libpcap-dev
     - go get github.com/mattn/goveralls
     - go get golang.org/x/tools/cmd/cover
 install:
diff --git a/Dockerfile b/Dockerfile
index 0c2db5d..03bf196 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,10 +2,11 @@ FROM golang:alpine as builder
 MAINTAINER xtaci <daniel820313@gmail.com>
 RUN apk update && \
     apk upgrade && \
-    apk add git
+    apk add git libpcap-dev
 RUN go get -ldflags "-X main.VERSION=$(date -u +%Y%m%d) -s -w" github.com/xtaci/kcptun/client && go get -ldflags "-X main.VERSION=$(date -u +%Y%m%d) -s -w" github.com/xtaci/kcptun/server
 
-FROM alpine:3.9
+FROM alpine:latest
 COPY --from=builder /go/bin /bin
 EXPOSE 29900/udp
+EXPOSE 29900
 EXPOSE 12948
diff --git a/client/config.go b/client/config.go
index a5d3ed4..5e01ed3 100644
--- a/client/config.go
+++ b/client/config.go
@@ -34,6 +34,7 @@ type Config struct {
 	SnmpLog      string `json:"snmplog"`
 	SnmpPeriod   int    `json:"snmpperiod"`
 	Quiet        bool   `json:"quiet"`
+	TCP          bool   `json:"tcp"`
 }
 
 func parseJSONConfig(config *Config, path string) error {
diff --git a/client/main.go b/client/main.go
index ad3a9a5..89333cc 100644
--- a/client/main.go
+++ b/client/main.go
@@ -18,6 +18,7 @@ import (
 	kcp "github.com/xtaci/kcp-go"
 	"github.com/xtaci/kcptun/generic"
 	"github.com/xtaci/smux"
+	"github.com/xtaci/tcpraw"
 )
 
 // SALT is use for pbkdf2 key expansion
@@ -221,6 +222,10 @@ func main() {
 			Name:  "quiet",
 			Usage: "to suppress the 'stream open/close' messages",
 		},
+		cli.BoolFlag{
+			Name:  "tcp",
+			Usage: "to emulate a TCP connection",
+		},
 		cli.StringFlag{
 			Name:  "c",
 			Value: "", // when the value is not empty, the config path must exists
@@ -256,6 +261,7 @@ func main() {
 		config.SnmpLog = c.String("snmplog")
 		config.SnmpPeriod = c.Int("snmpperiod")
 		config.Quiet = c.Bool("quiet")
+		config.TCP = c.Bool("tcp")
 
 		if c.String("c") != "" {
 			err := parseJSONConfig(&config, c.String("c"))
@@ -339,13 +345,26 @@ func main() {
 		log.Println("snmplog:", config.SnmpLog)
 		log.Println("snmpperiod:", config.SnmpPeriod)
 		log.Println("quiet:", config.Quiet)
+		log.Println("tcp:", config.TCP)
 
 		smuxConfig := smux.DefaultConfig()
 		smuxConfig.MaxReceiveBuffer = config.SmuxBuf
 		smuxConfig.KeepAliveInterval = time.Duration(config.KeepAlive) * time.Second
 
 		createConn := func() (*smux.Session, error) {
-			kcpconn, err := kcp.DialWithOptions(config.RemoteAddr, block, config.DataShard, config.ParityShard)
+			var kcpconn *kcp.UDPSession
+			if config.TCP {
+				conn, err := tcpraw.Dial("tcp", config.RemoteAddr)
+				if err != nil {
+					return nil, errors.Wrap(err, "tcpraw.Dial()")
+				}
+				kcpconn, err = kcp.NewConn(config.RemoteAddr, block, config.DataShard, config.ParityShard, conn)
+				if err != nil {
+					return nil, errors.Wrap(err, "createConn()")
+				}
+			}
+
+			kcpconn, err = kcp.DialWithOptions(config.RemoteAddr, block, config.DataShard, config.ParityShard)
 			if err != nil {
 				return nil, errors.Wrap(err, "createConn()")
 			}
diff --git a/go.mod b/go.mod
index 6133ab7..885294e 100644
--- a/go.mod
+++ b/go.mod
@@ -2,6 +2,7 @@ module github.com/xtaci/kcptun
 
 require (
 	github.com/golang/snappy v0.0.1
+	github.com/google/gopacket v1.1.17 // indirect
 	github.com/klauspost/cpuid v1.2.1 // indirect
 	github.com/klauspost/reedsolomon v1.9.2 // indirect
 	github.com/pkg/errors v0.8.1
@@ -11,9 +12,10 @@ require (
 	github.com/urfave/cli v1.20.0
 	github.com/xtaci/kcp-go v5.4.2+incompatible
 	github.com/xtaci/smux v1.3.3
-	golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5
-	golang.org/x/net v0.0.0-20190607181551-461777fb6f67 // indirect
-	golang.org/x/sys v0.0.0-20190610200419-93c9922d18ae // indirect
+	github.com/xtaci/tcpraw v1.0.11
+	golang.org/x/crypto v0.0.0-20190621222207-cc06ce4a13d4
+	golang.org/x/net v0.0.0-20190620200207-3b0461eec859 // indirect
+	golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0 // indirect
 	golang.org/x/text v0.3.2 // indirect
-	golang.org/x/tools v0.0.0-20190610231749-f8d1dee965f7 // indirect
+	golang.org/x/tools v0.0.0-20190625160430-252024b82959 // indirect
 )
diff --git a/go.sum b/go.sum
index 6a60fc7..2f5a73e 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,7 @@
 github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/google/gopacket v1.1.17 h1:rMrlX2ZY2UbvT+sdz3+6J+pp2z+msCq9MxTU6ymxbBY=
+github.com/google/gopacket v1.1.17/go.mod h1:UdDNZ1OO62aGYVnPhxT1U6aI7ukYtA/kB8vaU0diBUM=
 github.com/klauspost/cpuid v1.2.0 h1:NMpwD2G9JSFOE1/TJjGSo5zG7Yb2bTe7eq1jH+irmeE=
 github.com/klauspost/cpuid v1.2.0/go.mod h1:Pj4uuM528wm8OyEC2QMXAi2YiTZ96dNQPGgoMS4s3ek=
 github.com/klauspost/cpuid v1.2.1 h1:vJi+O/nMdFt0vqm8NZBI6wzALWdA2X+egi0ogNyrC/w=
@@ -91,6 +93,24 @@ github.com/xtaci/smux v1.3.2 h1:8NsGbxBW6oSaeLu5E6V8AmklZm6EhBz7BeCOU3Zdhwc=
 github.com/xtaci/smux v1.3.2/go.mod h1:f+nYm6SpuHMy/SH0zpbvAFHT1QoMcgLOsWcFip5KfPw=
 github.com/xtaci/smux v1.3.3 h1:+vnzZHTLGHrj+LzUZEkKmvu4KkG7fj4jwMPqhawvErg=
 github.com/xtaci/smux v1.3.3/go.mod h1:f+nYm6SpuHMy/SH0zpbvAFHT1QoMcgLOsWcFip5KfPw=
+github.com/xtaci/tcpraw v1.0.0 h1:pte2E7y6RbqmjGbbezoH/ZV3cqYATo0yT3iZvColyA4=
+github.com/xtaci/tcpraw v1.0.0/go.mod h1:dKyZ2V75s0cZ7cbgJYdxPvms7af0joIeOyx1GgJQbLk=
+github.com/xtaci/tcpraw v1.0.1/go.mod h1:dKyZ2V75s0cZ7cbgJYdxPvms7af0joIeOyx1GgJQbLk=
+github.com/xtaci/tcpraw v1.0.2/go.mod h1:dKyZ2V75s0cZ7cbgJYdxPvms7af0joIeOyx1GgJQbLk=
+github.com/xtaci/tcpraw v1.0.3 h1:JkOedFmlUQ3TwCBS93pCeaN1ENY4Q7bf2C+ytduN/9k=
+github.com/xtaci/tcpraw v1.0.3/go.mod h1:dKyZ2V75s0cZ7cbgJYdxPvms7af0joIeOyx1GgJQbLk=
+github.com/xtaci/tcpraw v1.0.4 h1:tCpmrmpR904XAQxoVe+HJmzh3gR/R1/PsCPNIWlS7kQ=
+github.com/xtaci/tcpraw v1.0.4/go.mod h1:dKyZ2V75s0cZ7cbgJYdxPvms7af0joIeOyx1GgJQbLk=
+github.com/xtaci/tcpraw v1.0.6 h1:A+J3FOHh5twbi2tAvLjyxKz7fHPRM49ibtUTwLZnYJs=
+github.com/xtaci/tcpraw v1.0.6/go.mod h1:dKyZ2V75s0cZ7cbgJYdxPvms7af0joIeOyx1GgJQbLk=
+github.com/xtaci/tcpraw v1.0.7 h1:zfoWxygl8T5MSrAezU0BNw0bBFGTIYIVIGnL9P9k0qk=
+github.com/xtaci/tcpraw v1.0.7/go.mod h1:dKyZ2V75s0cZ7cbgJYdxPvms7af0joIeOyx1GgJQbLk=
+github.com/xtaci/tcpraw v1.0.9 h1:r8NW59RJWOF6hubWOZ+/WqfiqRhg9Gumwz5jY47RvSU=
+github.com/xtaci/tcpraw v1.0.9/go.mod h1:dKyZ2V75s0cZ7cbgJYdxPvms7af0joIeOyx1GgJQbLk=
+github.com/xtaci/tcpraw v1.0.10 h1:AhES6V2LNqL59V8yBt+QGegBJUaw6QwT6pEHYb0Wsk4=
+github.com/xtaci/tcpraw v1.0.10/go.mod h1:dKyZ2V75s0cZ7cbgJYdxPvms7af0joIeOyx1GgJQbLk=
+github.com/xtaci/tcpraw v1.0.11 h1:mFWp9qwOwDjQqMgGFie7pBwDaPzJk+Lafq3Vgb85438=
+github.com/xtaci/tcpraw v1.0.11/go.mod h1:dKyZ2V75s0cZ7cbgJYdxPvms7af0joIeOyx1GgJQbLk=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190320223903-b7391e95e576 h1:aUX/1G2gFSs4AsJJg2cL3HuoRhCSCz733FE5GUSuaT4=
 golang.org/x/crypto v0.0.0-20190320223903-b7391e95e576/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
@@ -115,6 +135,8 @@ golang.org/x/crypto v0.0.0-20190513172903-22d7a77e9e5f h1:R423Cnkcp5JABoeemiGEPl
 golang.org/x/crypto v0.0.0-20190513172903-22d7a77e9e5f/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5 h1:58fnuSXlxZmFdJyvtTFVmVhcMLU6v5fEb/ok4wyqtNU=
 golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20190621222207-cc06ce4a13d4 h1:ydJNl0ENAG67pFbB+9tfhiL2pYqLhfoaZFw/cjLhY4A=
+golang.org/x/crypto v0.0.0-20190621222207-cc06ce4a13d4/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190320064053-1272bf9dcd53 h1:kcXqo9vE6fsZY5X5Rd7R1l7fTgnWaDCVmln65REefiE=
 golang.org/x/net v0.0.0-20190320064053-1272bf9dcd53/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
@@ -135,6 +157,8 @@ golang.org/x/net v0.0.0-20190509222800-a4d6f7feada5 h1:6M3SDHlHHDCx2PcQw3S4KsR17
 golang.org/x/net v0.0.0-20190509222800-a4d6f7feada5/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190607181551-461777fb6f67 h1:rJJxsykSlULwd2P2+pg/rtnwN2FrWp4IuCxOSyS0V00=
 golang.org/x/net v0.0.0-20190607181551-461777fb6f67/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859 h1:R/3boaszxrf1GEUWTVDzSKVwLmSJpwZ1yqXm8j0v2QI=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190321052220-f7bb7a8bee54/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -151,6 +175,8 @@ golang.org/x/sys v0.0.0-20190426135247-a129542de9ae/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190509141414-a5b02f93d862/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190610200419-93c9922d18ae h1:xiXzMMEQdQcric9hXtr1QU98MHunKK7OTtsoU6bYWs4=
 golang.org/x/sys v0.0.0-20190610200419-93c9922d18ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0 h1:HyfiK1WMnHj5FXFXatD+Qs1A/xC2Run6RzeW1SyHxpc=
+golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
@@ -161,3 +187,5 @@ golang.org/x/tools v0.0.0-20190509153222-73554e0f7805/go.mod h1:RgjU9mgBXZiqYHBn
 golang.org/x/tools v0.0.0-20190511041617-99f201b6807e/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190513233021-7d589f28aaf4/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190610231749-f8d1dee965f7/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
+golang.org/x/tools v0.0.0-20190624222133-a101b041ded4/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
+golang.org/x/tools v0.0.0-20190625160430-252024b82959/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
diff --git a/server/config.go b/server/config.go
index b3c7ea6..5858ccb 100644
--- a/server/config.go
+++ b/server/config.go
@@ -32,6 +32,7 @@ type Config struct {
 	SnmpPeriod   int    `json:"snmpperiod"`
 	Pprof        bool   `json:"pprof"`
 	Quiet        bool   `json:"quiet"`
+	TCP          bool   `json:"tcp"`
 }
 
 func parseJSONConfig(config *Config, path string) error {
diff --git a/server/main.go b/server/main.go
index f68dfff..ea93d0d 100644
--- a/server/main.go
+++ b/server/main.go
@@ -19,6 +19,7 @@ import (
 	kcp "github.com/xtaci/kcp-go"
 	"github.com/xtaci/kcptun/generic"
 	"github.com/xtaci/smux"
+	"github.com/xtaci/tcpraw"
 )
 
 // SALT is use for pbkdf2 key expansion
@@ -238,6 +239,10 @@ func main() {
 			Name:  "quiet",
 			Usage: "to suppress the 'stream open/close' messages",
 		},
+		cli.BoolFlag{
+			Name:  "tcp",
+			Usage: "to emulate a TCP connection",
+		},
 		cli.StringFlag{
 			Name:  "c",
 			Value: "", // when the value is not empty, the config path must exists
@@ -271,6 +276,7 @@ func main() {
 		config.SnmpPeriod = c.Int("snmpperiod")
 		config.Pprof = c.Bool("pprof")
 		config.Quiet = c.Bool("quiet")
+		config.TCP = c.Bool("tcp")
 
 		if c.String("c") != "" {
 			//Now only support json config file
@@ -331,7 +337,15 @@ func main() {
 			block, _ = kcp.NewAESBlockCrypt(pass)
 		}
 
-		lis, err := kcp.ListenWithOptions(config.Listen, block, config.DataShard, config.ParityShard)
+		var lis *kcp.Listener
+		var err error
+		if config.TCP {
+			conn, err := tcpraw.Listen("tcp", config.Listen)
+			checkError(err)
+			lis, err = kcp.ServeConn(block, config.DataShard, config.ParityShard, conn)
+			checkError(err)
+		}
+		lis, err = kcp.ListenWithOptions(config.Listen, block, config.DataShard, config.ParityShard)
 		checkError(err)
 		log.Println("listening on:", lis.Addr())
 		log.Println("target:", config.Target)
@@ -350,6 +364,7 @@ func main() {
 		log.Println("snmpperiod:", config.SnmpPeriod)
 		log.Println("pprof:", config.Pprof)
 		log.Println("quiet:", config.Quiet)
+		log.Println("tcp:", config.TCP)
 
 		if err := lis.SetDSCP(config.DSCP); err != nil {
 			log.Println("SetDSCP:", err)