Category Archives: Networking

HTTP Status Codes 401 Unauthorized and 403 Forbidden for Authentication and Authorization (and OAuth)

Posted on June 15, 2012 by Robert

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 … Continue reading →

Posted in Networking, Software Development, Web Technology | Leave a comment

OpenVPN over DSL with PPPoE

Posted on October 26, 2011 by Robert

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 … Continue reading →

Posted in Networking | 2 Comments

Two Subnetworks on One LAN, and Linux arp_filter

Posted on August 31, 2009 by Robert

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 … Continue reading →

Posted in Networking | 5 Comments

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

Posted on August 1, 2009 by Robert

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 … Continue reading →

Posted in Networking | 1 Comment