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Questions tagged [port]

A port is a communication end-point in the context of network communications or an interaction point for inter-component interactions. Do not use this tag for software ports from one platform or language to another, but use the tag "porting" instead.

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

Exclusion

  • Do not use this tag for software ports from one platform or language to another. Use the tag instead.

External references

  • Network ports as communication endpoint
  • Ports as interaction point between components in UML.
6733 questions
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34 answers

How do I find out which process is listening on a TCP or UDP port on Windows?

How do I find out which process is listening on a TCP or UDP port on Windows?
readonly
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34 answers

How to kill a process running on particular port in Linux?

I tried to close the tomcat using ./shutdown.sh from tomcat /bin directory. But found that the server was not closed properly. And thus I was unable to restartMy tomcat is running on port 8080. I want to kill the tomcat process running on 8080. I…
veer7
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28 answers

How do I remove the process currently using a port on localhost in Windows?

How can I remove the current process/application which is already assigned to a port? For example: localhost:8080
KavinduWije
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38 answers

What is the difference between a port and a socket?

This was a question raised by one of the software engineers in my organisation. I'm interested in the broadest definition.
Richard Dorman
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1090
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14 answers

scp with port number specified

I'm trying to scp a file from a remote server to my local machine. Only port 80 is accessible. I tried: scp -p 80 username@www.myserver.com:/root/file.txt . but got this error: cp: 80: No such file or directory How do I specify the port number in a…
One Two Three
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62 answers

How to configure port for a Spring Boot application

How do I configure the TCP/IP port listened on by a Spring Boot application, so it does not use the default port of 8080.
Paul Verest
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30 answers

How to kill a process on a port on ubuntu

I am trying to kill a process in the command line for a specific port in ubuntu. If I run this command I get the port: sudo lsof -t -i:9001 so...now I want to run: sudo kill 'sudo lsof -t -i:9001' I get this error message: ERROR: garbage process…
Tampa
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733
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15 answers

How do I assign a port mapping to an existing Docker container?

I'm not sure if I've misunderstood something here, but it seems like it's only possible to set port mappings by creating a new container from an image. Is there a way to assign a port mapping to an existing Docker container?
thasmo
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730
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8 answers

What is the difference between "expose" and "publish" in Docker?

I'm experimenting with Dockerfiles, and I think I understand most of the logic. However, I don't see the difference between "exposing" and "publishing" a port in this context. All the tutorials I have seen first include the EXPOSE command in the…
user1496984
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13 answers

How do I determine if a port is open on a Windows server?

I'm trying to install a site under an alternative port on a server, but the port may be closed by a firewall. Is there a way to ping out or in, on a specific port, to see if it is open?
Jason
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458
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5 answers

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 to say port 80. I know each client has a unique (for their machine) port. Does the server reply back from an available port to…
IamIC
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37 answers

Port 80 is being used by SYSTEM (PID 4), what is that?

I am trying to use port 80 for my application server, but when I perform netstat -aon I get: TCP 0.0.0.0:80 0.0.0.0:0 LISTENING 4 When I look up the process in task manager, it shows PID 4 is SYSTEM, that's it. No extension... nothing. Just…
GiH
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411
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9 answers

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 add origin ssh://user@host/srv/git/example
JuanPablo
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398
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19 answers

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?lang=it&report_type=consumer >>> https://localhost:8181
yelo3
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45 answers

Node.js Port 3000 already in use but it actually isn't?

I have been working with a node.js project for a few weeks and it has been working great. Usually, I use npm start to run my app and view it in a browser on localhost, port 3000. Today, I started to get the following error while using npm…
user2573690
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