The Sysadmin’s Daily Grind: Arpalert
ARP WATCH
Corporate policies prohibit the unauthorized connection of hardware to the company network, threatening dire consequences in the case of non-compliance. Fair enough, but how do you actually go about catching somebody trying to plug an illegal laptop into your Ethernet?
My choice for a faithful watchdog is Arpalert [1]. Arpalert creator Thierry Fournier recommends the following incantation to send the beast off into the wild: ./configure --prefix=/usr/local make make install This series of commands puts the C program in /usr/local/sbin and the arpalert.conf configuration file in /usr/local/etc/arpalert. No Place Like Home For my initial experiments, I decided to use a network that gives me excellent visibility, such as the network in my home office. It’s the weekend, and my wife has gone down to the local library, so I shouldn’t have more than four of five computers on the network. I did the following to launch Arpalert: /usr/local/sbin/arpalert
Buy this article as PDF
(incl. VAT)
Buy Linux Magazine
US / Canada
UK / Australia
News
-
KDE Plasma 5.24 Introduces Fingerprint Reader Support
The next release of the KDE Plasma desktop environment will include support for fingerprint readers for session authentication and more.
-
Ubuntu 21.10 Released and Finally Includes GNOME 40
The most anticipated update to Ubuntu is finally here and the workflow couldn't be better.
-
Linux Can Now Run on Apple’s M1 Chipset
Linux users looking to take advantage of Apple Silicon are about to get their wish with the M1 chipset.
-
MX Linux 21 RC Candidate Available For Testing
The MX Linux development team has released the RC images for MX Linux 21 for testing purposes.
-
Fedora 35 is Shaping Up to Be an Impressive Release
Although the beta version of Fedora’s upcoming release is behind schedule, the Linux distribution is still slotted for October and will include numerous bug fixes and some exciting new features.
-
Canonical Extends Support For Ubuntu 14.04 and 16.04
The company behind Ubuntu offered a much-needed lifeline to those who still depend on older versions of the open-source operating system.
-
GNOME 41 Has Arrived
The latest version of the GNOME desktop environment has been released with new functionality and plenty of improvements.
-
System76 Updates the 15" Pangolin with Ryzen
System76 announced they’re updating the Ryzen-powered Pangolin laptop to meet today’s need for more power.
-
KDE Plasma 5.23 Promises Plenty of Subtle Improvements
The next release of the KDE Plasma desktop includes new features, numerous improvements, and plenty of bug fixes.
-
GNOME 41 Beta is Now Available
The most popular open-source desktop environment is on the cusp of yet another new release, but don’t expect the massive changes found in the previous iteration.