ADMIN - Explore the new world of system administration! Special introductory offer! Order by September 30th to save 10% off the regular subscription price! Each issue delivers technical solutions to the real-world problems you face every day. Learn the latest techniques for better:
network security
system management
troubleshooting
performance tuning
virtualization
cloud computing
on Windows, Linux, Solaris, and popular varieties of Unix.
They say darkness is the friend of thieves, but the Perl daemon in this month’s column illuminates dastardly deeds, exposing hidden activities and alerting the admin when things seem to be going awry.
Users normally don’t get to see what’s going on under the covers of a LAN. One hidden activity is packet addressing on the last hop of a route, which includes discovering a device’s unique MAC address to match an IP address. This activity is the domain of the ARP protocol. Watching all MAC addresses currently in use can lead to interesting conclusions about who is using or abusing a local network.
Watch our free Video Archive from Apachecon US 2009. Archive provided by The Apache Foundation, COLLABNET, and Linux Pro Magazine
Drawing internationally renowned thought-leaders, contributors, and organizations in the Open Source community, ApacheCon offers insight into the culture and community that develops and shepherds industry-leading Open Source projects, including Apache HTTP Server – the world's most popular Web server software for more than 10 years.
Comments