If your company network is having problems and you need to troubleshoot it, you also need to know some basic information about the computers on the network. Internet Protocol is the underlying ...

Need to know the IP address of your router, as assigned by your ISP, or the IP of your computer, as assigned by your router? These numbers are easy to find when you know where to look. Eric has been ...

Every device connected to a network has an IP address. It is a unique identifier that locates your computer or Mac on the network. Your Mac connects to the internet through a network or router; which ...

Checking open ports can be done using built-in tools like Command Prompt or PowerShell, which list active ports and the ...

Install nmap if you don't already have it on your Linux computer. Run "sudo apt-get install nmap" on Ubuntu, or "sudo dnf ...

You can change your IP address from the network settings controls menu on a Windows PC, Mac, and even your phone.

If a computer is unable to configure a valid Internet Protocol address, it can't connect to a network. If you plug a laptop directly into a modem with an Ethernet cable and receive a "No Valid IP ...

This tip is excerpted from "Network troubleshooting and diagnostics," Chapter 4 of The Shortcut Guide to Network Management for the Mid-Market, written by Greg Shields and published by ...

Many a time IT admin needs to set up multiple IP addresses to the same network adapter. Situations such as hosting multiple SSL sites can speed up traffic exchanges, which can bypass the gateway in ...

Turn off your router. Unplug the power adapter from the wall socket. Wait for a few minutes. Plug the power adapter from the wall socket and turn on your router. Now ...

Your IP address might be blocked on a website if you try logging in too many times or if you're suspected of being a spammer.

I have a user who's machine is not pingable on our network, using computer hostname or associated IP. However, in troubleshooting this, I see that the IP the machine actually has does not resolve to ...