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? Have you seen such a restriction before and if yes then what would be the reason behind such a restriction? Thank you. Not quite sure exactly what restriction you mean but you can restrict on destination port and ip and source port and IP if that helps rgds steve.
Hi Steve, So here is the scenario. The webserver A has the port open for any incoming requests. The webserver A hosts a website and one of the pages of that website has C code which makes API calls to a remote server B. So my questions are:- 1. Is it possible for the network admin to disallow API calls to ports other than ?
What could be the reason for such a restriction? After all, how can restricting a destination port give you any sort of advantage? Port is just a number on which the server listens.
Please help. Yes you can filter incoming traffic on port, ip address and protocol even on basic firewalls. Restricting ports is for security reasons Rgds Steve. I want to read a data from a machine which supports open protocol if the machine is in network and if I know IP address and port number socket how can I read a data from it I know it send and receive data in packet format. Thank you, Steve!
Hi Not quite sure of what you mean exactly but load balancing is quite common. Question: When a program on your computer sends or receives data over the Internet it sends that data to an ip address and a specific port on the remote computer. How does my computer know what port a specific application is working on another computer to populate the TCP Header?
When Machine A connects to machine B. The source ip and port are contained in the connection packet as well as the destination port and IP address. Hi You need to use DNS. Most devices have MDNS enabled. Great site. I have a quick question. Then you start feeling anger tinged The Internet is a scary place. Criminals on the Internet have the ability to hide behind their computers, or even other peoples computers, while they attempt to break into your computer to steal personal information or to use it for their own purposes.
To make matters worse, there always seems to be a security hole in your software or operating system that is not fixed fast enough that could With so much of Computer use these days revolving around the Internet and communicating with others, its important that you understand what exactly a network is. Without networks, all communication between your computer and other computers whether it be instant messaging, email, web browsing, or downloading music could not be achieved.
This tutorial will strive to teach you about networks and When using the Internet most people connect to web sites, ftp servers or other Internet servers by connecting to a domain name, as in www. Internet applications, though, do not communicate via domain names, but rather using IP addresses, such as Therefore when you type a domain name in your program that you wish to connect to, your application must first convert How to make the Start menu full screen in Windows How to open an elevated PowerShell Admin prompt in Windows Not a member yet?
Register Now. Introduction In this tutorial we will discuss the concept of Ports and how they work with IP addresses. IP address with Ports This all probably still feels confusing to you, and there is nothing wrong with that, as this is a complicated concept to grasp. Users who read this also read:. Tracing a hacker Have you ever been connected to your computer when something strange happens? Understanding and Using Firewalls The Internet is a scary place.
Ports are numbered and used as global standards to identify specific processes or types of network services. Much like before shipping something to a foreign country, you'd agree where you'd be shipping out of and where you'd have it arriving, TCP ports allow for standardized communication between devices.
One device can receive information for many different processes and services, and which port the information flows on helps to keep it organized. He further describes how you can use the netstat command-line tool to find port use information. TCP is a connection-oriented protocol that requires a connection or a circuit between the source sending computer and the destination one.
UDP, which is a best-effort connectionless protocol, is the other one. Generally, a TCP port represents an application or service-specific endpoint identifier. Think of opening a web browser. When you type in "CBTNuggets. And with that, you're specifying the hypertext transfer protocol — and hopefully, you get the page without issue. The well-known port for HTTP is By contrast, you might download some software from ftp.
And so forth. Protip: If you're planning to earn an IT certification exam, you may need to have many of the most common TCP ports memorized. Specifically, there are 65, available TCP ports. You've probably heard that the world is moving from IPv4 to IPv6 due to address depletion. It's also entirely likely that the time will come when we'll have to expand the port range to accommodate additional services.
That said, the first 1, TCP ports are called well-known port numbers, and they're agreed upon among technology vendors. However, this authentication method is now considered unsafe and is no longer in use. With a real estate website, you can set yourself apart from the competition With the right tools, a homepage for tradesmen can be created quickly and legally compliant What do ports do? List of the most important ports Among the over 65, ports, there are few code numbers that are essential for Internet communication.
Well-known ports. Registered ports. Related Products. View packages. Build a real estate website With a real estate website, you can set yourself apart from the competition Handyman website With the right tools, a homepage for tradesmen can be created quickly and legally compliant
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