Hence, websocket and tcp have a relationship to each other and can not be comparable. Python Javascript Linux Cheat sheet Contact. Tags: Tcp Websocket. How does Linux allocate bandwidth between processes? It has built in error checking and will re transmit missing packets. UDP — is for connection less applications. It has no has built in error checking and will not re transmit missing packets. Applications are designed to use either the UDP or TCP transport layer protocol depending on the type of connection they require.
It can use any port, but the web server application is designed to use a TCP connection. Windows and Linux systems have a utility called netstat which will give you a list of open ports on your computer. These articles show you how to use netstat on windows and on linux. You can check the port status of remote machines using a port scanner line nmap.
It can be used with a graphical user interface of as a command line tool. Here is a useful article on using NMAP from the command line. Connection states — if you are wondering what established and listening and the other state descriptions mean. Online port tester Collection of tools for port scanning and web server testing. I have a problem with an application that uses fixed source ports in the communication with the server.
If the communication ends for some reason the clients tries to put the communication up again using the same source port. I have a software which creates 4 sockets with apparently random numbers the person who developed left no documentation. Is there a way to interconnect those random number sockets and port so the client is able to connect to the software? Hi It sounds like the software is supposed to be a server which usually has fixed ports. What does the software do?
It receives video data, connects to a MariaDB server, and serves as an API to it, receiving calls from a mobile app and sending customer data back. I wonder if the reason why it opens 4 sockets is to receive and send video data and receive and send customer data. Either way, the problem is that it creates sockets of random numbers instead of a port which is what the android app uses.
When you say it receives video data I assume that that is coming in on a port. The database would need another. The mobile app is used to view the video I assume. Is any part of it working.
Where is the mobile App located internet or same network. Is this a standard kit or is it put together by yourself? Rgds Steve. The software creates 4 sockets with random port numbers but none of them are the port which the APP uses. The mobile App is on the internet. The software connects to a tunnel connection I tried to use ssh -D Does it have any setup instructions.
Is it off the shelf software and does it have a website that I can take a look at. It is a bespoke software made by a person who left the company and never left any documentation. Hi, I have a question, is it possible for me to run 2 applications and connect to different ip but using same port number example ?
Yes you are doing that when you connect to two different websites as they both use port 80 rgds steve. So I have a question. Can server A somehow restrict me and only allow connections to the port on the remote server B and not allow me to connect me to any other port on remote server B? Unix sockets don't exist on Windows.
Named pipes are present on Linux as well. Windows 10 has support for Unix sockets. There are some limitations, but it's available: blogs. Show 5 more comments. Of course TCP sockets is part of the TCP protocol specification Internet protocol specifications only tend to concern what happens on the wire, the TCP spec contains a definition of Socket but that definition is not the same as how the term is used by the "sockets API". Peter Green Peter Green 3, 10 10 silver badges 27 27 bronze badges.
AIUI unfortunately not. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. A socket is a combination of port and IP address.
An incoming packet has a port number which is used to identify the process that needs to consume the packet. The lowest numbered port numbers are used for the most commonly used services. These ports are called the well-known ports. Higher-numbered ports are available for general use by applications and are known as ephemeral ports.
It is used to identify both a machine and a service within the machine. The same port number can be used in different computer running on same software.
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