ARP spoofing and poisoning
TRAFFIC TRICKS
Any user on a LAN can sniff and manipulate local traffic. ARP spoofing and poisoning techniques give an attacker an easy way in.
Curiousity, revenge, industrial espionage are all reasons why insiders attack systems on their own network. Statistics show that 70 to 80 percent of all attacks originate on the internal network [1]. Admins have a hard time preventing these internal attacks because protecting the internal network is a lot more difficult than protecting against external attack. One of the most formidable forms of internal attack is known as ARP spoofing. ARP spoofing puts an attacker in a position to sniff and manipulate local traffic. So-called man-in-the-middle attacks are easy to perform, and thanks to sophisticated software, even attackers with little knowledge of networking stand a good chance of succeeding. How ARP Works The ARP protocol was published in November 1982 by David C. Plummer as RFC 826 [2]. As IT security was not an important factor back in 1982, the aim was simply to provide functionality. ARP maps IP addresses to MAC addresses. If client C needs to send a packet to server S, it needs to know the MAC address of S if both machines are on the same subnet. Even if S resides in a different network, C still needs a MAC address – in this case, the address of the next router that will forward the packet. The router takes care of everything else.
Buy this article as PDF
(incl. VAT)
Buy Linux Magazine
News
-
Titan Linux is a New KDE Linux Based on Debian Stable
Titan Linux is a new Debian-based Linux distribution that features the KDE Plasma desktop with a focus on usability and performance.
-
Danielle Foré Has an Update for elementary OS 7
Now that Ubuntu 22.04 has been released, the team behind elementary OS is preparing for the upcoming 7.0 release.
-
Linux New Media Launches Open Source JobHub
New job website focuses on connecting technical and non-technical professionals with organizations in open source.
-
Ubuntu Cinnamon 22.04 Now Available
Ubuntu Cinnamon 22.04 has been released with all the additions from upstream as well as other features and improvements.
-
Pop!_OS 22.04 Has Officially Been Released
From the makers of some of the finest Linux-powered desktop and laptop computers on the market comes the latest version of their Ubuntu-based distribution, Pop!_OS 22.04.
-
Star Labs Unveils a New Small Format Linux PC
The Byte Mk I is an AMD-powered mini Linux PC with Coreboot support and plenty of power.
-
MX Linux Verison 21.1 “Wildflower” Now Available
The latest release of the systemd-less MX Linux is now ready for public consumption.
-
Microsoft Expands Their Windows Subsystem for Linux Offerings With AlmaLinux
Anyone who works with Windows Subsystem for Linux (WSL) will now find a new addition to the available distributions, one that’s become the front-runner replacement for CentOS.
-
Debian 11.3 Released wIth Numerous Bug and Security Fixes
The latest point release for Debian Bullseye is now available with some very important updates.
-
The First Alpha of Asahi Linux is Available
Asahi Linux is the first distribution to fully support Apple Silicon and is now available for testing.