[Okta Webinar] Learn how to a build a cloud-first strategyRegister Now


Port not open

Posted on 2011-04-26
Medium Priority
Last Modified: 2012-05-11
New box with Windows Server 2008 R2. There is specific software that needs to establish a session using ports 5001>5021. I have created seperate rules for TCP & UDP traffic and it will not work. Another software that uses Telnet - will work however. I also am not able to telnet into any of those ports locally or from another box.

Question by:gwg80
LVL 84

Expert Comment

by:Dave Baldwin
ID: 35471895
What program on the server is listening on those ports?  You can't telnet to a port without a listener that can respond.

Author Comment

ID: 35471914
Vendor provided software. I will look into that tomorrow.
LVL 13

Accepted Solution

rhinoceros earned 1000 total points
ID: 35473214
Have you also tried to stop Windows 2008's firewall to check your software is working or not ?

Furthermore, are you sure that your firewall rule step is correct ?

How to configure the new Windows Server 2008 advanced firewall MMC snap-in

How to use the "netsh advfirewall firewall" control Windows Firewall behavior
LVL 10

Assisted Solution

pand0ra_usa earned 1000 total points
ID: 35516994
Do a netstat on the server to make sure the software is really listening on the designated ports. If so, then try using a port scanner (like nmap) on the server to verify the service is accessible. Most likely the app doesn't listen on all ports but will communicate on any one in that range so the netstat should tell you what it is listening on. Let me know if you have any questions on this.

nmap command:

nmap -vv -sT -PN -p 5001-5021 <hostname or IP>

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Container Orchestration platforms empower organizations to scale their apps at an exceptional rate. This is the reason numerous innovation-driven companies are moving apps to an appropriated datacenter wide platform that empowers them to scale at a …
A safe way to clean winsxs folder from your windows server 2008 R2 editions
This tutorial will walk an individual through locating and launching the BEUtility application to properly change the service account username and\or password in situation where it may be necessary or where the password has been inadvertently change…
There are cases when e.g. an IT administrator wants to have full access and view into selected mailboxes on Exchange server, directly from his own email account in Outlook or Outlook Web Access. This proves useful when for example administrator want…
Suggested Courses

872 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