Solved

How to check if port is open but bloked by firewall

Posted on 2012-12-27
5
1,361 Views
Last Modified: 2012-12-27
Hello Experts,

I have Solaris 10 SPARC running on my customer side. I have root account so that I can install any software. Last time I install monit which making port 2812 Listen and I can access locally. On my side I use VPN connection to customer server. When I try to check port 2812 is inaccessible even port in Listening. I realized that port may be blocked by some firewall. My object is to find some port that accessible. The question is how to check which port is allowed by firewall to access?

Thank you.
0
Comment
Question by:trazodone
  • 2
  • 2
5 Comments
 
LVL 68

Assisted Solution

by:woolmilkporc
woolmilkporc earned 300 total points
ID: 38725051
Try a simple port scanner like this one:

http://www.radmin.com/products/previousversions/portscanner.php
0
 

Author Comment

by:trazodone
ID: 38725215
Hi,

Port scanner will result in open port that already listen. It mean that I cannot config my application to use that port because it has already reserved by other application already, Am I correct? My point it to find port that is open,allowed access by firewall,and not reserves by any application.
0
 
LVL 68

Assisted Solution

by:woolmilkporc
woolmilkporc earned 300 total points
ID: 38725555
Normally, a firewall would block all ports except for those deliberately opened.
So why don't you just ask your or your customer's firewall admin(s) to open port 2812 for you?
0
 
LVL 83

Accepted Solution

by:
Dave Baldwin earned 200 total points
ID: 38725742
The only ports that are "open" are those that have a program listening to them.  If there is no listener, it is by definition, not open.
0
 

Author Closing Comment

by:trazodone
ID: 38726211
Thank you
0

Featured Post

U.S. Department of Agriculture and Acronis Access

With the new era of mobile computing, smartphones and tablets, wireless communications and cloud services, the USDA sought to take advantage of a mobilized workforce and the blurring lines between personal and corporate computing resources.

Question has a verified solution.

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

A few customers have recently asked my thoughts on Password Managers.  As Security is a big part of our industry I was initially very hesitant and sceptical about giving a program all of my secret passwords.  But as I was getting asked about them mo…
Getting hacked is no longer a matter or "if you get hacked" — the 2016 cyber threat landscape is now titled "when you get hacked." When it happens — will you be proactive, or reactive?
Learn how to navigate the file tree with the shell. Use pwd to print the current working directory: Use ls to list a directory's contents: Use cd to change to a new directory: Use wildcards instead of typing out long directory names: Use ../ to move…
In a previous video, we went over how to export a DynamoDB table into Amazon S3.  In this video, we show how to load the export from S3 into a DynamoDB table.

789 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