Charly's Column The Sysadmin’s Daily Grind: ArpalertNov 30, 2006
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?more »
Charly's Column The Sysadmin’s Daily Grind: EthtoolMar 31, 2006
A touchy LAN that plays like a movie diva can spoil any admin’s day. Ethtool to the rescue!more »
Netfilter L7 Blocking protocols at Layer 7 with the L7 patchFeb 28, 2006
If you need a tool for filtering protocols that doesn’t depend on the port, try L7, an IPTables patch that operates through regular expressions.more »
TCP Hijacking Understanding and preventing TCP attacksAug 31, 2005
It is quite easy to take a TCP connection down using a RST attack, and this risk increases with applications that need long-term connections, such as VPNs, DNS zone transfers, and BGP. We’ll describe how a TCP attack can happen, and we’ll show you some simple techniques for protecting your network.more »
Charly's Column The Sysadmin’s Daily Grind: SmokepingApr 30, 2005
If you do not receive a response to a ping, or if the response is seriously delayed, you might like to take this as a warning. But who wants to ping all day? You need a ping-based monitoring utility like Smokeping.more »
New release marks the arrival of AMD’s unified driver strategy.
A new study by IDC charts big changes in the big hardware market.
Azure CTO says Redmond has already considered the unthinkable.
Lead developer quells rumors that the Debian version is slated for center stage.
MSBuild is now just another GitHub project as Redmond continues its path to the light.
Malware could pass data and commands between disconnected computers without leaving a trace on the network.
New rules emphasize collegiality in coding.
Upstart lands in the dust bin as a new era begins for Linux.
HP's annual Cyber Risk report offers a bleak look at the state of IT.
But what do the big numbers really mean?