Kali Linux was released on the 13th of February, 2013 as a complete rebuild of BackTrack Linux, adhering completely to Debian development standards. It is maintained and funded by Offensive Security Ltd. You may well ask “How did you get this far if you didn’t have the network configured?” In this case, assume DHCP gave us our starting IP address, but for some reason you need to modify those parameters.Kali Linux is a Debian-derived Linux distribution designed for digital forensics and penetration testing. The function of this icon is very similar to the windows “TV Set” down in the lower right of the screen in the taskbar of a Windows desktop system. If you are working with a Linux system using a GUI, you can configure the network interface via an icon in the far upper right of the screen. Your network is now configured and your system is connected to your local network and optionally, the internet. DHCP is Dynamic Host Configuration Protocol. These numbers were received from DHCP because when you move the Ethernet connection button to ON, the installer queries DHCP and registers the system with DHCP. When you do this, the network information appears: IP address, Default Route, and DNS. Here’s the initial screen, using “Network & Host Name” in the rightmost column, third selection down: The Anaconda installer prompts for network configuration and you can’t complete the installation without providing these numbers to the installer. I used CentOS 8 to generate the images, but everything you see here is the same in Fedora and Red Hat Enterprise Linux. In each case, the numbers I use will be real numbers applicable to the system I used to write this article. I’ll skip that so you can get on into the point of the article: Three ways to configure network interfaces. Note that I’m not going into the how of these numbers I’m just telling you they are needed to configure the network interface. This number can be automatically generated but is sometimes requested by the method you use to configure the interface. Netmask: The non-unique number that defines the network itself. If you are using a home router, your home router generates this number because it is the gateway through which you communicate with the wider world. Again, it has the general format and takes a form that also works with the other two numbers. Gateway: The unique number assigned to the network interface at the "other end of the wire" that your computer must communicate through. You won’t have to enter the number at all. If you are using a home router with DHCP, which is the typical default configuration, the router will “assign” the IP address to your network interface. It’s possible for this number to be purely made up, but normally it takes a form that works with the other three numbers. It has the form:, where “xxx” are three, or fewer, numbers between 0 and 255. IP Address: The unique number defining the access point to your network interface. Those three fundamental numerical pieces are: This article covers the bare minimum for IPv4. You will need three fundamental pieces of numerical information in order to minimally configure a network interface to work over IPv4 and more if you want to define things like IPv6, hostnames, or DNS servers. All of the configuration methods require the entry of sets of numbers that allow the network interface to operate. Want to browse the web, watch YouTube, stream video, audio or files? It’s all done over the network interface. RPM-based Linux distributions using Gnome have several fundamental ways to configure the network interface. I'm describing three ways in this article. How well do you know Linux? Take a quiz and get a badgeĪlmost any useful work that one would want to do with a Linux system requires a network interface.Linux system administration skills assessment.A guide to installing applications on Linux.Download RHEL 9 at no charge through the Red Hat Developer program.
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