diff --git a/pkg/config/config.go b/pkg/config/config.go
index 3ff6dcb8..a8529408 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -16,6 +16,7 @@ package config
 
 import (
 	"fmt"
+	"net"
 	"os"
 
 	"github.com/sirupsen/logrus"
@@ -133,3 +134,19 @@ func (c *Config) GetLoggerFields() logrus.Fields {
 
 	return fields
 }
+
+func GetLocalIP() (string, error) {
+	addrs, err := net.InterfaceAddrs()
+	if err != nil {
+		return "", nil
+	}
+	for _, address := range addrs {
+		if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
+			if ipnet.IP.To4() != nil {
+				return ipnet.IP.String(), nil
+			}
+		}
+	}
+
+	return "", fmt.Errorf("No local IP found")
+}
diff --git a/pkg/sip/service_test.go b/pkg/sip/service_test.go
new file mode 100644
index 00000000..6aee3e8e
--- /dev/null
+++ b/pkg/sip/service_test.go
@@ -0,0 +1,39 @@
+package sip
+
+import (
+	"fmt"
+	"math/rand"
+	"testing"
+
+	"github.com/livekit/mediatransportutil/pkg/rtcconfig"
+	"github.com/livekit/sip/pkg/config"
+	"github.com/stretchr/testify/require"
+)
+
+const (
+	testPortSIPMin = 30000
+	testPortSIPMax = 30050
+
+	testPortRTPMin = 30100
+	testPortRTPMax = 30150
+)
+
+// Test service E2E that
+func TestService(t *testing.T) {
+	sipPort := rand.Intn(testPortSIPMax-testPortSIPMin) + testPortSIPMin
+
+	s, err := NewService(&config.Config{
+		SIPPort: sipPort,
+		RTPPort: rtcconfig.PortRange{Start: testPortRTPMin, End: testPortRTPMax},
+	})
+	require.NoError(t, err)
+	require.NotNil(t, s)
+
+	s.SetAuthHandler(func(_, _, _, _ string) (string, string, error) {
+		return "", "", fmt.Errorf("Auth Failure")
+	})
+
+	require.NoError(t, s.Start())
+
+	s.Stop()
+}
diff --git a/test/client/main.go b/test/client/main.go
index c58af721..a98f5fd7 100644
--- a/test/client/main.go
+++ b/test/client/main.go
@@ -29,6 +29,7 @@ import (
 	"github.com/emiago/sipgo"
 	"github.com/emiago/sipgo/sip"
 	"github.com/icholy/digest"
+	"github.com/livekit/sip/pkg/config"
 	"github.com/livekit/sip/pkg/media/ulaw"
 	"github.com/pion/rtp"
 	"github.com/pion/sdp/v2"
@@ -113,22 +114,6 @@ func startMediaListener() *net.UDPConn {
 	return conn
 }
 
-func getLocalIP() string {
-	addrs, err := net.InterfaceAddrs()
-	if err != nil {
-		panic(err)
-	}
-	for _, address := range addrs {
-		if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
-			if ipnet.IP.To4() != nil {
-				return ipnet.IP.String()
-			}
-		}
-	}
-
-	panic("No IP Found")
-}
-
 func getResponse(tx sip.ClientTransaction) *sip.Response {
 	select {
 	case <-tx.Done():
@@ -153,13 +138,13 @@ func createOffer(port int) ([]byte, error) {
 			SessionVersion: sessionId,
 			NetworkType:    "IN",
 			AddressType:    "IP4",
-			UnicastAddress: getLocalIP(),
+			UnicastAddress: config.GetLocalIP(),
 		},
 		SessionName: "LiveKit",
 		ConnectionInformation: &sdp.ConnectionInformation{
 			NetworkType: "IN",
 			AddressType: "IP4",
-			Address:     &sdp.Address{Address: getLocalIP()},
+			Address:     &sdp.Address{Address: config.GetLocalIP()},
 		},
 		TimeDescriptions: []sdp.TimeDescription{
 			sdp.TimeDescription{
@@ -261,7 +246,7 @@ func attemptInvite(sipClient *sipgo.Client, offer []byte, authorizationHeaderVal
 	inviteRequest.SetDestination(*sipServer)
 	inviteRequest.SetBody(offer)
 	inviteRequest.AppendHeader(sip.NewHeader("Content-Type", "application/sdp"))
-	inviteRequest.AppendHeader(sip.NewHeader("Contact", fmt.Sprintf("<sip:livekit@%s:5060>", getLocalIP())))
+	inviteRequest.AppendHeader(sip.NewHeader("Contact", fmt.Sprintf("<sip:livekit@%s:5060>", config.GetLocalIP())))
 	inviteRequest.AppendHeader(sip.NewHeader("Allow", "INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, MESSAGE, OPTIONS, INFO, SUBSCRIBE"))
 
 	if authorizationHeaderValue != "" {
@@ -281,7 +266,7 @@ func main() {
 	flag.Parse()
 
 	if *sipServer == "" {
-		*sipServer = getLocalIP() + ":5060"
+		*sipServer = config.GetLocalIP() + ":5060"
 	}
 
 	mediaConn := startMediaListener()
@@ -297,7 +282,7 @@ func main() {
 		panic(err)
 	}
 
-	sipClient, err := sipgo.NewClient(ua, sipgo.WithClientHostname(getLocalIP()))
+	sipClient, err := sipgo.NewClient(ua, sipgo.WithClientHostname(config.GetLocalIP()))
 	if err != nil {
 		panic(err)
 	}