diff --git a/hack/run-e2e.sh b/hack/run-e2e.sh
index d51d0ce..a574b6d 100755
--- a/hack/run-e2e.sh
+++ b/hack/run-e2e.sh
@@ -26,7 +26,7 @@ frpsPath=${ROOT}/bin/frps
 if [ "${FRPS_PATH}" ]; then
     frpsPath="${FRPS_PATH}"
 fi
-concurrency="12"
+concurrency="16"
 if [ "${CONCURRENCY}" ]; then
     concurrency="${CONCURRENCY}"
 fi
diff --git a/test/e2e/framework/framework.go b/test/e2e/framework/framework.go
index f8b8aa0..e0be5af 100644
--- a/test/e2e/framework/framework.go
+++ b/test/e2e/framework/framework.go
@@ -67,7 +67,7 @@ func NewDefaultFramework() *Framework {
 		TotalParallelNode: suiteConfig.ParallelTotal,
 		CurrentNodeIndex:  suiteConfig.ParallelProcess,
 		FromPortIndex:     10000,
-		ToPortIndex:       60000,
+		ToPortIndex:       30000,
 	}
 	return NewFramework(options)
 }
diff --git a/test/e2e/framework/process.go b/test/e2e/framework/process.go
index 139753e..ae89e82 100644
--- a/test/e2e/framework/process.go
+++ b/test/e2e/framework/process.go
@@ -42,7 +42,7 @@ func (f *Framework) RunProcesses(serverTemplates []string, clientTemplates []str
 		ExpectNoError(err)
 		time.Sleep(500 * time.Millisecond)
 	}
-	time.Sleep(1 * time.Second)
+	time.Sleep(2 * time.Second)
 
 	currentClientProcesses := make([]*process.Process, 0, len(clientTemplates))
 	for i := range clientTemplates {
@@ -76,7 +76,7 @@ func (f *Framework) RunFrps(args ...string) (*process.Process, string, error) {
 		return p, p.StdOutput(), err
 	}
 	// sleep for a while to get std output
-	time.Sleep(time.Second)
+	time.Sleep(2 * time.Second)
 	return p, p.StdOutput(), nil
 }
 
@@ -87,7 +87,7 @@ func (f *Framework) RunFrpc(args ...string) (*process.Process, string, error) {
 	if err != nil {
 		return p, p.StdOutput(), err
 	}
-	time.Sleep(time.Second)
+	time.Sleep(2 * time.Second)
 	return p, p.StdOutput(), nil
 }
 
diff --git a/test/e2e/legacy/basic/server.go b/test/e2e/legacy/basic/server.go
index f3c2a22..ca6717c 100644
--- a/test/e2e/legacy/basic/server.go
+++ b/test/e2e/legacy/basic/server.go
@@ -22,11 +22,11 @@ var _ = ginkgo.Describe("[Feature: Server Manager]", func() {
 		clientConf := consts.LegacyDefaultClientConfig
 
 		serverConf += `
-			allow_ports = 20000-25000,25002,30000-50000
+			allow_ports = 10000-11000,11002,12000-13000
 		`
 
-		tcpPortName := port.GenName("TCP", port.WithRangePorts(20000, 25000))
-		udpPortName := port.GenName("UDP", port.WithRangePorts(30000, 50000))
+		tcpPortName := port.GenName("TCP", port.WithRangePorts(10000, 11000))
+		udpPortName := port.GenName("UDP", port.WithRangePorts(12000, 13000))
 		clientConf += fmt.Sprintf(`
 			[tcp-allowded-in-range]
 			type = tcp
@@ -37,7 +37,7 @@ var _ = ginkgo.Describe("[Feature: Server Manager]", func() {
 			[tcp-port-not-allowed]
 			type = tcp
 			local_port = {{ .%s }}
-			remote_port = 25001
+			remote_port = 11001
 			`, framework.TCPEchoServerPort)
 		clientConf += fmt.Sprintf(`
 			[tcp-port-unavailable]
@@ -55,7 +55,7 @@ var _ = ginkgo.Describe("[Feature: Server Manager]", func() {
 			[udp-port-not-allowed]
 			type = udp
 			local_port = {{ .%s }}
-			remote_port = 25003
+			remote_port = 11003
 			`, framework.UDPEchoServerPort)
 
 		f.RunProcesses([]string{serverConf}, []string{clientConf})
@@ -65,7 +65,7 @@ var _ = ginkgo.Describe("[Feature: Server Manager]", func() {
 		framework.NewRequestExpect(f).PortName(tcpPortName).Ensure()
 
 		// Not Allowed
-		framework.NewRequestExpect(f).Port(25001).ExpectError(true).Ensure()
+		framework.NewRequestExpect(f).Port(11001).ExpectError(true).Ensure()
 
 		// Unavailable, already bind by frps
 		framework.NewRequestExpect(f).PortName(consts.PortServerName).ExpectError(true).Ensure()
@@ -76,7 +76,7 @@ var _ = ginkgo.Describe("[Feature: Server Manager]", func() {
 
 		// Not Allowed
 		framework.NewRequestExpect(f).RequestModify(func(r *request.Request) {
-			r.UDP().Port(25003)
+			r.UDP().Port(11003)
 		}).ExpectError(true).Ensure()
 	})
 
diff --git a/test/e2e/pkg/port/port.go b/test/e2e/pkg/port/port.go
index b9bcccf..49cc9a6 100644
--- a/test/e2e/pkg/port/port.go
+++ b/test/e2e/pkg/port/port.go
@@ -79,6 +79,7 @@ func (pa *Allocator) GetByName(portName string) int {
 		udpConn.Close()
 
 		pa.used.Insert(port)
+		pa.reserved.Delete(port)
 		return port
 	}
 	return 0
diff --git a/test/e2e/v1/basic/server.go b/test/e2e/v1/basic/server.go
index eed1dda..f2f4e0a 100644
--- a/test/e2e/v1/basic/server.go
+++ b/test/e2e/v1/basic/server.go
@@ -23,14 +23,14 @@ var _ = ginkgo.Describe("[Feature: Server Manager]", func() {
 
 		serverConf += `
 		allowPorts = [
-		  { start = 20000, end = 25000 },
-		  { single = 25002 },
-		  { start = 30000, end = 50000 },
+		  { start = 10000, end = 11000 },
+		  { single = 11002 },
+		  { start = 12000, end = 13000 },
 		]
 		`
 
-		tcpPortName := port.GenName("TCP", port.WithRangePorts(20000, 25000))
-		udpPortName := port.GenName("UDP", port.WithRangePorts(30000, 50000))
+		tcpPortName := port.GenName("TCP", port.WithRangePorts(10000, 11000))
+		udpPortName := port.GenName("UDP", port.WithRangePorts(12000, 13000))
 		clientConf += fmt.Sprintf(`
 			[[proxies]]
 			name = "tcp-allowded-in-range"
@@ -43,7 +43,7 @@ var _ = ginkgo.Describe("[Feature: Server Manager]", func() {
 			name = "tcp-port-not-allowed"
 			type = "tcp"
 			localPort = {{ .%s }}
-			remotePort = 25001
+			remotePort = 11001
 			`, framework.TCPEchoServerPort)
 		clientConf += fmt.Sprintf(`
 			[[proxies]]
@@ -64,7 +64,7 @@ var _ = ginkgo.Describe("[Feature: Server Manager]", func() {
 			name = "udp-port-not-allowed"
 			type = "udp"
 			localPort = {{ .%s }}
-			remotePort = 25003
+			remotePort = 11003
 			`, framework.UDPEchoServerPort)
 
 		f.RunProcesses([]string{serverConf}, []string{clientConf})
@@ -74,7 +74,7 @@ var _ = ginkgo.Describe("[Feature: Server Manager]", func() {
 		framework.NewRequestExpect(f).PortName(tcpPortName).Ensure()
 
 		// Not Allowed
-		framework.NewRequestExpect(f).Port(25001).ExpectError(true).Ensure()
+		framework.NewRequestExpect(f).Port(11001).ExpectError(true).Ensure()
 
 		// Unavailable, already bind by frps
 		framework.NewRequestExpect(f).PortName(consts.PortServerName).ExpectError(true).Ensure()
@@ -85,7 +85,7 @@ var _ = ginkgo.Describe("[Feature: Server Manager]", func() {
 
 		// Not Allowed
 		framework.NewRequestExpect(f).RequestModify(func(r *request.Request) {
-			r.UDP().Port(25003)
+			r.UDP().Port(11003)
 		}).ExpectError(true).Ensure()
 	})