diff --git a/header/scan.go b/header/scan.go
index bab28f6..ded151b 100644
--- a/header/scan.go
+++ b/header/scan.go
@@ -30,7 +30,6 @@ func Scan(ipRange string, speed int) {
 		log.Println(err)
 		return
 	}
-	DetectEnable = true
 
 	var winDivertAddr godivert.WinDivertAddress
 
diff --git a/main.go b/main.go
index f15b77e..336d723 100644
--- a/main.go
+++ b/main.go
@@ -54,6 +54,12 @@ func StartService() {
 		tcpioneer.LogLevel = 1
 	}
 
+	if ScanIPRange != "" {
+		tcpioneer.DetectEnable = true
+		tcpioneer.ScanURL = ScanURL
+		tcpioneer.ScanTimeout = ScanTimeout
+	}
+
 	tcpioneer.TCPDaemon(":443", false)
 	tcpioneer.TCPDaemon(":80", false)
 	tcpioneer.UDPDaemon(443, false)
@@ -74,9 +80,6 @@ func StartService() {
 	}
 
 	if ScanIPRange != "" {
-		tcpioneer.ScanURL = ScanURL
-		tcpioneer.ScanTimeout = ScanTimeout
-
 		go tcpioneer.Scan(ScanIPRange, ScanSpeed)
 	}