Listing Internet Connections in Windows with Ipconfig

Home > Blogs > Windows 10 > Listing Internet Connections in Windows with Ipconfig

Listing Internet Connections in Windows with Ipconfig

Like This Blog 0 Mike Danseglio
Added by May 29, 2015

“What is my computer doing on the internet?”
“What servers does this new software talk to?”
“Where are these cloud files kept?”
“Does {insert any software here} use the internet all the time or does it ask me first?”

I get these kinds of questions all the time. Many users and administrators want to know what their software is connecting to, both internet and intranet resources.

I’ve seen some very complex answers to this problem including packet analyzers, network sniffers, and even router-based logging. But there are much simpler and inexpensive tools that are already built in to Windows.

Using Ipconfig to List the DNS Resolution Cache

Pretty much every modern software package relies on TCP/IP for network communication. The software provides a server name and lets TCP/IP take care of the rest. And almost universally, computers use the Domain Name System (DNS) to resolve server (or host) names to IP addresses for communication.

To list the host names that Windows has recently resolved, simply open a command prompt and type ipconfig.exe /displaydns as shown in Figure 1.

001-Using-Ipconfig-to-List-The-DNS-Resolution-Cache

Figure 1. This list just keeps going…

My list is pages and pages long. Some of the hosts are easily recognizable, like linkedin.com. Others are a bit more difficult to interpret.

Even though the default cache time is 5 minutes, if the computer has been running for some time you probably want to clear the list first. To do that, simply run ipconfig.exe /flushdns. That will clear all previous DNS resolution entries and only show new resolution entries.

Enjoy!

Mike Danseglio -CISSP / MCSE / CEH
Interface Technical Training – Technical Director and Instructor

Videos You May Like

Agile Methodology in Project Management

0 171 0

In this video, you will gain an understanding of Agile and Scrum Master Certification terminologies and concepts to help you make better decisions in your Project Management capabilities. Whether you’re a developer looking to obtain an Agile or Scrum Master Certification, or you’re a Project Manager/Product Owner who is attempting to get your product or … Continue reading Agile Methodology in Project Management

Creating Users and Managing Passwords in Microsoft Office 365

0 740 4

In this Office 365 training video, instructor Spike Xavier demonstrates how to create users and manage passwords in Office 365.   For instructor-led Office 365 training classes, see our course schedulle: Spike Xavier SharePoint Instructor – Interface Technical Training Phoenix, AZ 20347: Enabling and Managing Office 365    

Windows 10 Features and Navigation – December 1, 2015

0 128 1

In this recorded Windows 10 webinar from December 1,2015, Windows Instructor Steve Fullmer presents the navigation and some of the new features associated with Windows 10 including Sysinternals Tools for Windows Client, Windows core concepts, exploring Process Explorer as well as some of the features that are not yet ready for prime time but will … Continue reading Windows 10 Features and Navigation – December 1, 2015

Write a Comment

Share your thoughts...

Please fill out the comment form below to post a reply.