PORT 4369: Erlang makes use of a Port Mapper Daemon (epmd) for resolution of node names in a cluster. Nodes must be able to reach each other and the port mapper daemon for clustering to work. PORT 35197 set by inet_dist_listen_min/max Firewalls must permit traffic in this range to pass between clustered nodes RabbitMQ Management … Read more
There are a couple of good free services that let you do the same. Ideal for showing something quickly during development/testing: http://localtunnel.me/ https://ngrok.com/ http://localhost.run/ Cloudflare Tunnel Edits: add ngrok service add localhost.run service 04/22 – add CloudFlare Tunnel
/etc/services is only advisory, it’s a listing of well-known ports. It doesn’t mean that anything is actually running on that port or that the named service will run on that port. In PostgreSQL’s case it’s typical to use port 5432 if it is available. If it isn’t, most installers will choose the next free port, … Read more
Express 4.x answer: Express 4.x (per Tien Do’s answer below), now treats app.listen() as an asynchronous operation, so listener.address() will only return data inside of app.listen()’s callback: var app = require(‘express’)(); var listener = app.listen(8888, function(){ console.log(‘Listening on port ‘ + listener.address().port); //Listening on port 8888 }); Express 3 answer: I think you are looking … Read more
TCP / HTTP Listening On Ports: How Can Many Users Share the Same Port So, what happens when a server listen for incoming connections on a TCP port? For example, let’s say you have a web-server on port 80. Let’s assume that your computer has the public IP address of 24.14.181.229 and the person that … Read more
As the others have said, you’ll have to kill all processes that are listening on that port. The easiest way to do that would be to use the fuser(1) command. For example, to see all of the processes listening for HTTP requests on port 80 (run as root or use sudo): # fuser 80/tcp If … Read more
Do not bind to a specific port. Instead, bind to port 0: import socket sock = socket.socket() sock.bind((”, 0)) sock.getsockname()[1] The OS will then pick an available port for you. You can get the port that was chosen using sock.getsockname()[1], and pass it on to the slaves so that they can connect back. sock is … Read more
Type in the command: netstat -aon | findstr :80 It will show you all processes that use port 80. Notice the pid (process id) in the right column. If you would like to free the port, go to Task Manager, sort by pid and close those processes. –a displays all connections and listening ports. –o … Read more
A surprise I found out recently is that Bash natively supports tcp connections as file descriptors. To use: exec 6<>/dev/tcp/ip.addr.of.server/445 echo -e “GET / HTTP/1.0\n” >&6 cat <&6 I’m using 6 as the file descriptor because 0,1,2 are stdin, stdout, and stderr. 5 is sometimes used by Bash for child processes, so 3,4,6,7,8, and 9 … Read more
I solved the error by changing the port for the project. I did the following steps: 1 – Right click on the project. 2 – Go to properties. 3 – Go to Server tab. 4 – On tab section, change the project URL for other port, like 8080 or 3000. Good luck!