Top "Port" questions

A port is a communication end-point in the context of network communications or an interaction point for inter-component interactions.

stop all instances of node.js server

This is my first time working with Node.js and I ran into this problem: I have started a Node …

javascript windows node.js express port
postgresql port confusion 5433 or 5432?

I have installed postgresql on OSX. When I run psql, I get $ psql psql: could not connect to server: No …

postgresql port psql
Get protocol, domain, and port from URL

I need to extract the full protocol, domain, and port from a given URL. For example: https://localhost:8181/ContactUs-1.0/contact?…

javascript url dns protocols port
How do multiple clients connect simultaneously to one port, say 80, on a server?

I understand the basics of how ports work. However, what I don't get is how multiple clients can simultaneously connect …

http tcp connection client-server port
git remote add with other SSH port

In Git, how can I add a remote origin server when my host uses a different SSH port? git remote …

git ssh port
Freeing up a TCP/IP port?

netstat -tulnap shows me what ports are in use. How to free up a port in Linux?

linux networking tcp port
Can two applications listen to the same port?

Can two applications on the same machine bind to the same port and IP address? Taking it a step further, …

sockets tcp udp port communication
How do I close an open port from the terminal on the Mac?

I opened port #5955 from a java class to comunicate from a client. How do i close this port after I …

macos port
How to change tomcat port number

I am developing a web application in JSP, in that for some purpose I need to change tomcat accessing port. …

java tomcat port
Find the PID of a process that uses a port on Windows

My service crash on startup with the classic: java.rmi.server.ExportException: Listen failed on port: 9999 How can I find …

port