Solved

HOW TO FIND A TCP PORT IS OPEN OR NOT

Posted on 2000-03-01
6
361 Views
Last Modified: 2008-02-26
I am using the internet behind a proxy and i want to use web phone, in this case i need certain ports to be opened, is there any way for me to check whether those ports are open.

pls. reply to ganesh@gnmds.global.net.in

0
Comment
Question by:rganeshs
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
6 Comments
 
LVL 1

Expert Comment

by:vujos
ID: 2572397
Hi,

You can use port finding tool like IP Tools (free download at
http://tucows.cgocable.net/pingnt.html)


Hope this helps.
0
 
LVL 1

Expert Comment

by:jbeaman
ID: 2572646
Here is a site that you can go to that will allow you to check what ports on your firewall are open:

https://grc.com/x/ne.dll?bh0bkyd2
0
Revamp Your Training Process

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action.

 
LVL 12

Expert Comment

by:j2
ID: 2576486
jbeaman: That service only checks which ports have services running. Not which ports are open. There is a difference.

(It will not find a port even if it IS open, unless a service answers)
0
 

Expert Comment

by:OllyW
ID: 2577554
A useful utility for viewing TCP port status on a machine is TCPView at www.sysinternals.com. The tool is great, and sysinternals is one of the best technical sites on the internet for windows - and free.
0
 

Accepted Solution

by:
frangers99 earned 100 total points
ID: 2630596
I wanted to know a similar question like that once, and the solution is a Portmonitor from http://www.leechsoftware.com it's free and if you keep it running it tells you everyport that is open and constantly keeps updating.

Alternatively you could open a dos window and type netstat and that will tell you all the open ports.
0

Featured Post

Why Off-Site Backups Are The Only Way To Go

You are probably backing up your data—but how and where? Ransomware is on the rise and there are variants that specifically target backups. Read on to discover why off-site is the way to go.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When it comes to write a Context Sensitive Help (an online help that is obtained from a specific point in state of software to provide help with that state) ,  first we need to make the file that contains all topics, which are given exclusive IDs. …
Today, the web development industry is booming, and many people consider it to be their vocation. The question you may be asking yourself is – how do I become a web developer?
This video teaches users how to migrate an existing Wordpress website to a new domain.
Any person in technology especially those working for big companies should at least know about the basics of web accessibility. Believe it or not there are even laws in place that require businesses to provide such means for the disabled and aging p…

726 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question