Category: Networking
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HTTP Status Codes 401 Unauthorized and 403 Forbidden for Authentication and Authorization (and OAuth)
When a client requests a resource from an HTTP server and it’s not allowed to access that resource, the client needs to know enough about why in order to present the right message or options to the user. Basically, we need to know whether the user can do something about it or not. HTTP status…
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OpenVPN over DSL with PPPoE
I work remotely and use OpenVPN to access development services such as SVN and our file server, both of which are at our colocation facility. While at a new location, I first encountered a problem trying to do any SVN operations. Turned out that any significant traffic to any server at the colo would cause…
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AT&T U-verse for the Curious Consumer – The Residential Gateway and Wiring Options
AT&T U-verse is an Internet, TV (IPTV), and phone (VOIP) service delivered primarily by fiber and existing copper. This article is targeted at consumers who would like a little bit of light shed on the in-home hardware (what it does, how it works, and the different ways it can be set up) and wiring options.
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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 3800HGV-B “residential gateway”) has forced…
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AT&T U-verse — A Network Geek’s Perspective
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…