Robert LaThanh

Month: August 2009

  • Two Subnetworks on One LAN, and Linux arp_filter

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    Robert
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    It’s a rare situation in a small networking environment that having two subnetworks on one broadcast domain can be an issue. I would normally avoid such a scenario (and it’s usually easy to do so) but I recently got AT&T’s U-verse, and the do-it-all device that it requires (a 2Wire 3800HGV-B “residential gateway”) has forced…

  • Beware of DVI-I Cables (they are Not Compatible with DVI-D Devices)

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    Robert
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    I recently moved my flat-panel displays further away from my computer, but the DVI cables they came with weren’t long enough to connect the displays to the computer in their new location. So, I ordered some longer DVI cables from Newegg.com. Turns out that both of my displays’ ports are DVI-D and that the cables…

  • AT&T U-verse — A Network Geek’s Perspective

    AT&T U-verse — A Network Geek’s Perspective

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    Robert
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    I just got AT&T U-verse, which delivers Internet, TV (IPTV), and phone (VOIP) service to the home; all this over one pair of copper from the VRAD. My upgrades to the service include HD TV, DVR, and a static IP block for my personal servers. This article sheds some light on some peculiarities about how…