windows-networking

How to enable ICMP service in Windows?

由 淺唱寂寞╮ 提交于 2020-06-17 22:55:51
问题 It is enabled by default, however I can't tell it's not enabled, because Firewall is disabled ping 127.0.0.1 times out. I get If you google for "enable icmp in windows", all you get is how to open a port on the firewall, but that assumes that your icmp daemon/service is enabled, but how do you enable it? 回答1: The process that listens to port 7 to ICMP echo requests is called TCPSVCS.EXE You can try calling "C:\Windows\System32\TCPSVCS.EXE" to see if it works and starts listening to ICMP echo

How to enable ICMP service in Windows?

由 寵の児 提交于 2020-06-17 22:55:22
问题 It is enabled by default, however I can't tell it's not enabled, because Firewall is disabled ping 127.0.0.1 times out. I get If you google for "enable icmp in windows", all you get is how to open a port on the firewall, but that assumes that your icmp daemon/service is enabled, but how do you enable it? 回答1: The process that listens to port 7 to ICMP echo requests is called TCPSVCS.EXE You can try calling "C:\Windows\System32\TCPSVCS.EXE" to see if it works and starts listening to ICMP echo

Why is .NET's File.Open with a UNC path making excessive SMB calls?

由 瘦欲@ 提交于 2020-01-30 15:24:28
问题 I have a block of code that needs to open and read a lot of small text files from a NAS server using UNC paths. This code is part of a module that was originally written in C++ but is now being converted to C#. The C# version is significantly slower. I determined that the call to open the file accounts for nearly all of the performance difference. Using WireShark I found that this is because the System.IO.File.Open call makes far more SMB network requests than similar C++ code. The C++ code

Why is .NET's File.Open with a UNC path making excessive SMB calls?

由 人走茶凉 提交于 2020-01-30 15:24:27
问题 I have a block of code that needs to open and read a lot of small text files from a NAS server using UNC paths. This code is part of a module that was originally written in C++ but is now being converted to C#. The C# version is significantly slower. I determined that the call to open the file accounts for nearly all of the performance difference. Using WireShark I found that this is because the System.IO.File.Open call makes far more SMB network requests than similar C++ code. The C++ code

How to know if given IPV6 address belongs to the same subnet as local machine

由 帅比萌擦擦* 提交于 2020-01-07 07:45:10
问题 Currenly I have a c function that takes a ip address and subnetmask and checks if given ipv4 is private/public. It does by following logic to matchsubnet: (local ipv4 address && local subnetmask) == (given ipv4 && given subnetmask) What logic can be written for ipv6? I can write a function to receive an ip and subnet prefix. Can i get local subnet prefix? 回答1: I order to determine if two hosts are on the same subnet take both their addresses and prefix lengths (subnet masks). If the prefix

Network Drive Not Available On Startup

由 青春壹個敷衍的年華 提交于 2019-12-12 14:36:23
问题 I have a C# application which loads at startup, and logs data to a network drive, which is mounted as X: When the machine first boots, the application throws an error that X:\ is not available. If I restart the app, same error. However, if I open Windows Explorer and double click to browse the drive, I can then run the application and it will connect to X: just fine. Do network drives not automatically initialise on startup, despite being mapped? Is there a way to set them to initialise

apache on windows network - can't connect to external ip from in network

由 与世无争的帅哥 提交于 2019-12-08 04:55:31
问题 I created an AMP web application that was originally going to be served from a traditional 3rd party host. As we finished up, the client decided to host it internally, on a server in their office network. The application is only meant to be available to staff members, but those staff members will often be off-site. I had no involvement in setting up their network, which uses at least one server running windows server 2003. The client machines I saw were XP. I set up Apache, MySQL and PHP on

Binding multiple times to the same port?

由 这一生的挚爱 提交于 2019-12-06 12:05:59
问题 Why doesn't the following code throw a "java.net.BindException: Address already in use: JVM_Bind" exception? import java.net.InetSocketAddress; import java.net.ServerSocket; public class Test { public static void main(String[] args) throws Exception { try (ServerSocket socket1 = new ServerSocket(); ServerSocket socket2 = new ServerSocket(); ServerSocket socket3 = new ServerSocket()) { int port = 10000; socket1.setReuseAddress(false); socket1.bind(new InetSocketAddress("0.0.0.0", port));

Binding multiple times to the same port?

由 ￡可爱￡侵袭症＋ 提交于 2019-12-04 17:33:46
Why doesn't the following code throw a "java.net.BindException: Address already in use: JVM_Bind" exception? import java.net.InetSocketAddress; import java.net.ServerSocket; public class Test { public static void main(String[] args) throws Exception { try (ServerSocket socket1 = new ServerSocket(); ServerSocket socket2 = new ServerSocket(); ServerSocket socket3 = new ServerSocket()) { int port = 10000; socket1.setReuseAddress(false); socket1.bind(new InetSocketAddress("0.0.0.0", port)); socket2.setReuseAddress(false); socket2.bind(new InetSocketAddress("127.0.0.1", port)); socket3

Get Destination Ip/Port of active udp Connection?

由 江枫思渺然 提交于 2019-12-04 06:36:19
问题 I m able to retrieved active TCP and UDP connection using iphlpapi. The TCP Connection showing with source info(ip/port), Destination info(ip/port), state and process id. But for UDP Connection its no giving remote IP and port. That what i want to get. Any way to get destination information using source information or process id in Delphi or c++. 回答1: UDP is a connectionless protocol. You can only get the local port that has been opened. UPDATE: This applies for a static look at the port
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