diff --git a/src/main/java/net/geedge/EnvApiApplication.java b/src/main/java/net/geedge/EnvApiApplication.java
index 42f8818..4983142 100644
--- a/src/main/java/net/geedge/EnvApiApplication.java
+++ b/src/main/java/net/geedge/EnvApiApplication.java
@@ -1,7 +1,9 @@
 package net.geedge;
 
 import cn.hutool.extra.spring.EnableSpringUtil;
+import cn.hutool.log.Log;
 import net.geedge.api.entity.EnvApiYml;
+import net.geedge.common.T;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
@@ -14,6 +16,8 @@ import java.util.TimeZone;
 @SpringBootApplication
 public class EnvApiApplication {
 
+    private final static Log log = Log.get();
+
     public static void main(String[] args) {
         TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
         SpringApplication.run(EnvApiApplication.class, args);
@@ -36,6 +40,10 @@ public class EnvApiApplication {
         adb.setHost(environment.getProperty("adb.host"));
         adb.setPort(environment.getProperty("adb.port", Integer.class));
 
+        String droidvncDefaultConfig = T.FileUtil.readUtf8String(T.FileUtil.file(T.WebPathUtil.getRootPath(), "./lib/droidvnc-np-defaults.json"));
+        Integer vncPort = T.JSONUtil.parseObj(droidvncDefaultConfig).getInt("port", 5900);
+        adb.setVncPort(vncPort);
+
         EnvApiYml.Vnc vnc = apiYml.new Vnc();
         vnc.setHost(environment.getProperty("vnc.host"));
         vnc.setPort(environment.getProperty("vnc.port", Integer.class));
@@ -43,6 +51,8 @@ public class EnvApiApplication {
         apiYml.setEnv(envEntity);
         apiYml.setAdb(adb);
         apiYml.setVnc(vnc);
+
+        log.info("[envProperties] [value: {}]", T.JSONUtil.toJsonStr(apiYml));
         return apiYml;
     }
 }
\ No newline at end of file
diff --git a/src/main/java/net/geedge/api/controller/APIController.java b/src/main/java/net/geedge/api/controller/APIController.java
index 477b489..182f9d6 100644
--- a/src/main/java/net/geedge/api/controller/APIController.java
+++ b/src/main/java/net/geedge/api/controller/APIController.java
@@ -150,25 +150,32 @@ public class APIController {
             throw new APIException(result.output());
         }
 
-        if (returnFile) {
-            // response pcap file
-            File tempFile = T.FileUtil.file(Constant.TEMP_PATH, id + ".pcap");
-            try {
-                String filePath = result.output();
-                if (T.StrUtil.isEmpty(filePath)) {
-                    throw new APIException(RCode.NOT_EXISTS);
+        String filePath = result.output();
+        try {
+            if (returnFile) {
+                // response pcap file
+                File tempFile = T.FileUtil.file(Constant.TEMP_PATH, id + ".pcap");
+                try {
+                    if (T.StrUtil.isEmpty(filePath)) {
+                        throw new APIException(RCode.NOT_EXISTS);
+                    }
+                    AdbUtil.CommandResult pulled = adbUtil.pull(filePath, tempFile.getAbsolutePath());
+                    if (0 != pulled.exitCode()) {
+                        throw new APIException(pulled.output());
+                    }
+                    T.ResponseUtil.downloadFile(response, tempFile.getName(), T.FileUtil.readBytes(tempFile));
+                } finally {
+                    T.FileUtil.del(tempFile);
                 }
-                AdbUtil.CommandResult pulled = adbUtil.pull(filePath, tempFile.getAbsolutePath());
-                if (0 != pulled.exitCode()) {
-                    throw new APIException(pulled.output());
-                }
-                T.ResponseUtil.downloadFile(response, tempFile.getName(), T.FileUtil.readBytes(tempFile));
-            } finally {
-                T.FileUtil.del(tempFile);
+            } else {
+                // response taskid
+                response.getWriter().write(T.JSONUtil.toJsonStr(R.ok().putData("id", id)));
+            }
+        } finally {
+            if (T.StrUtil.isNotEmpty(filePath)) {
+                // remove pcap file
+                adbUtil.execShellCommand(String.format("shell rm -rf %s", filePath));
             }
-        } else {
-            // response taskid
-            response.getWriter().write(T.JSONUtil.toJsonStr(R.ok().putData("id", id)));
         }
     }
 
diff --git a/src/main/java/net/geedge/api/entity/EnvApiYml.java b/src/main/java/net/geedge/api/entity/EnvApiYml.java
index e568262..547ab0a 100644
--- a/src/main/java/net/geedge/api/entity/EnvApiYml.java
+++ b/src/main/java/net/geedge/api/entity/EnvApiYml.java
@@ -21,6 +21,8 @@ public class EnvApiYml {
         String serial;
         String host;
         Integer port;
+
+        Integer vncPort;
     }
 
     @Data
diff --git a/src/main/java/net/geedge/api/util/AdbUtil.java b/src/main/java/net/geedge/api/util/AdbUtil.java
index 9a72fa6..a17230b 100644
--- a/src/main/java/net/geedge/api/util/AdbUtil.java
+++ b/src/main/java/net/geedge/api/util/AdbUtil.java
@@ -29,6 +29,8 @@ public class AdbUtil {
     private String host;
     private Integer port;
 
+    private Integer vncPort;
+
     private ExecutorService threadPool;
 
     public String getSerial() {
@@ -42,6 +44,7 @@ public class AdbUtil {
         this.serial = T.StrUtil.emptyToDefault(adb.getSerial(), "");
         this.host = adb.getHost();
         this.port = adb.getPort();
+        this.vncPort = adb.getVncPort();
         // adb connect
         this.connect();
         // init
@@ -585,7 +588,7 @@ public class AdbUtil {
             String pcapFilePath = "/data/local/tmp/capture_" + userId + "_" + packageName + "_" + taskId + ".pcap";
             CommandExec.execForProcess(AdbCommandBuilder.builder()
                     .serial(this.getSerial())
-                    .buildShellCommand(String.format("shell tcpdump -i nflog:%s -w %s &", userId, pcapFilePath))
+                    .buildShellCommand(String.format("shell tcpdump not port %s -i nflog:%s -w %s &", this.vncPort, userId, pcapFilePath))
                     .build());
         } else {
             log.info("[startTcpdump] [capture all package]");
@@ -593,7 +596,7 @@ public class AdbUtil {
             String pcapFilePath = "/data/local/tmp/capture_all_" + taskId + ".pcap";
             CommandExec.execForProcess(AdbCommandBuilder.builder()
                     .serial(this.getSerial())
-                    .buildShellCommand(String.format("shell tcpdump -w %s &", pcapFilePath))
+                    .buildShellCommand(String.format("shell tcpdump not port %s -w %s &", this.vncPort, pcapFilePath))
                     .build());
         }