Solved

How do I check if a port is open to another office (WAN to LAN)?

Posted on 2011-03-22
8
792 Views
Last Modified: 2012-05-11
Hello,

I have a phone system that has software that trys to connect to a outside office via port 44000. It tells me that the connection cannot be made. The vendor is telling me that port 44000 is not open, so i want to know how I can check the port.

I'm on 1.0 network and the phone system is on 19.0. I can ping the phone system.

Thanks,

nimdatx
0
Comment
Question by:nimdatx
8 Comments
 
LVL 7

Accepted Solution

by:
mmicha earned 250 total points
ID: 35190028
A lot of the time, if you use telnet/putty and try to connect to the ip on that port you will get some type of output.
0
 
LVL 7

Expert Comment

by:mmicha
ID: 35190044
You could also try and download a free port scanner and point it at the ip address of the phone system and that would report back if it sees anything open.  You just want to make sure it isn't scanning only well know ports.  Since 44000 is not one, you might have to specify it.
0
 
LVL 1

Author Comment

by:nimdatx
ID: 35190291
I have a Adtran 5305 Router and do you know how to check what ports are open on router?

Thanks,

nimdax
0
PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

 
LVL 7

Expert Comment

by:mmicha
ID: 35190335
I don't know how to configure that type of router.  Someone else might have to join in to assist you.
0
 
LVL 33

Assisted Solution

by:MikeKane
MikeKane earned 100 total points
ID: 35192890
On the addtran, are you doing a port forward to the inside host or a 1 to 1 nat from a public IP to private ip?  

If it is a shared ip, hop on any internal machine, hit canyouseeme.org, and test port 44000.   You can see the ip and test the port using that site.  

0
 
LVL 6

Assisted Solution

by:602650528
602650528 earned 150 total points
ID: 35197204
all you need do is telnet to the ip and port. For example if the ip of the router 10.9.0.1. You do ;

telnet 10.9.0.1 44000

You might get a blank screen or something on your screen, as long as you don't get any blocked message then it is open. If that port is blocked, you will get a message saying it is REFUSED.
0
 
LVL 5

Expert Comment

by:balasundaram_s
ID: 35199507
I have a phone system that has software that trys to connect to a outside office via port 44000.

So, the data traffic goes OUTSIDE via port 44000 and that might be blocked by firewall.  You need to talk to the Security team to allow outgoing data traffic via port 44000.
0
 
LVL 1

Author Comment

by:nimdatx
ID: 35206955
The issue was the phone system. All my settings were good. WireShark help identify where the issue was at.

Thanks so much.
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone 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

I recently attended Cisco Live! in Las Vegas, a conference that boasted over 28,000 techies in attendance, and a week of hands-on learning hosted by a solid partner with which Concerto goes to market.  Every year, Cisco displays cutting-edge technol…
Use of TCL script on Cisco devices:  - create file and merge it with running configuration to apply configuration changes
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Both in life and business – not all partnerships are created equal. As the demand for cloud services increases, so do the number of self-proclaimed cloud partners. Asking the right questions up front in the partnership, will enable both parties …

830 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