Solved

How to get current listing of network ports in use?

Posted on 2016-08-29
4
40 Views
Last Modified: 2016-09-17
As title mentions, how do I get a current listing of network ports on our network that are in use?  I remember doing this a few years back, but uncertain of the steps now.  I think it was from a command line and a dump to a txt file or similar?  Appreicate any feedback on the most efficient way of getting this completed.
0
Comment
Question by:CICSA
  • 2
4 Comments
 
LVL 68

Assisted Solution

by:Qlemo
Qlemo earned 250 total points (awarded by participants)
ID: 41775178
The question is too broad for a complete answer. You can directly view which ports are in use on your machine at the moment, e.g. by running netstat -an in a cmd prompt. To see used ports in your network, you would either have to do that on all machines, or extract port and address info from a network capture (which is necessarily incomplete).
0
 
LVL 28

Accepted Solution

by:
Jan Springer earned 250 total points (awarded by participants)
ID: 41775185
If you are trying to determine ports that are open or open/filtered externally, use nmap.  You can scan an entire subnet.
0
 
LVL 4

Expert Comment

by:AlexBlinov
ID: 41775641
Do you use Cisco switches?
0
 
LVL 28

Expert Comment

by:Jan Springer
ID: 41802906
I do.  I've been using them for many years.
0

Featured Post

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.

Question has a verified solution.

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

In this article, I am going to show you how to simulate a multi-site Lab environment on a single Hyper-V host. I use this method successfully in my own lab to simulate three fully routed global AD Sites on a Windows 10 Hyper-V host.
Most of the applications these days are on Cloud. Cloud is ubiquitous with many service providers in the market. Since it has many benefits such as cost reduction, software updates, remote access, disaster recovery and much more.
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…
In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're interested in additional methods for monitoring bandwidt…

932 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

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now