Two Subnetworks on One LAN, and Linux arp_filter

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 3300HGV-B “residential gateway”) has forced [...]

AT&T U-Verse -- A Network Geek's Perspective

I just got AT&T U-verse, which delivers Internet, TV (IPTV), and phone service (VOIP) 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 servers. The device that they provided me with, a 2Wire 3300HGV-B (“Residential [...]