com.cf.vpn.VPNCheck.sendCmd::Permission denied
2012-02-22 20:57:08.008 com.cf.vpn.VPNCheck.sendCmd::Permission denied
org.apache.harmony.luni.platform.OSNetworkSystem.socket:-2
dalvik.system.BlockGuard$WrappedNetworkSystem.socket:335
org.apache.harmony.luni.net.PlainDatagramSocketImpl.create:110
java.net.DatagramSocket.createSocket:191
java.net.DatagramSocket.<init>:77
com.cf.vpn.VPNCheck.sendDatagramPacket:240
com.cf.vpn.VPNCheck.sendCmd:254
com.cf.vpn.VPNCheck.launchVPNConnection:121
com.cf.vpn.VPNTestTool.clickBtnDial:26
com.cf.vpn.VPNTestTool.access$0:24
com.cf.vpn.VPNTestTool$1.onClick:20
android.view.View.performClick:2574
android.view.View$PerformClick.run:9223
android.os.Handler.handleCallback:587
android.os.Handler.dispatchMessage:92
android.os.Looper.loop:130
android.app.ActivityThread.main:3691
java.lang.reflect.Method.invokeNative:-2
java.lang.reflect.Method.invoke:507
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run:907
com.android.internal.os.ZygoteInit.main:665
dalvik.system.NativeStart.main:-2

出现以上异常是由于在AndroidManifest.xml文件中没有添加：
<uses-permission android:name="android.permission.INTERNET" />