Lee H. Badman

Network Computing Blogger


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Where the Cloud Touches Down: Simplifying Data Center Infrastructure Management

Thursday, July 25, 2013
10:00 AM PT/1:00 PM ET

In most data centers, DCIM rests on a shaky foundation of manual record keeping and scattered documentation. OpManager replaces data center documentation with a single repository for data, QRCodes for asset tracking, accurate 3D mapping of asset locations, and a configuration management database (CMDB). In this webcast, sponsored by ManageEngine, you will see how a real-world datacenter mapping stored in racktables gets imported into OpManager, which then provides a 3D visualization of where assets actually are. You'll also see how the QR Code generator helps you make the link between real assets and the monitoring world, and how the layered CMDB provides a single point of view for all your configuration data.

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A Network Computing Webinar:
SDN First Steps

Thursday, August 8, 2013
11:00 AM PT / 2:00 PM ET

This webinar will help attendees understand the overall concept of SDN and its benefits, describe the different conceptual approaches to SDN, and examine the various technologies, both proprietary and open source, that are emerging. It will also help users decide whether SDN makes sense in their environment, and outline the first steps IT can take for testing SDN technologies.

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RADIUS Is The Secure WLAN’s Best Friend

When the topic of high-quality wireless networking comes up, its trendy to bandy about notions of blazing throughput and Star Trek-sounding features like "beam forming" and "band steering." But before a client gets to benefit from the growing magic built into the contemporary wireless network, it probably needs to be scrutinized under the lens of “triple A”: authentication, authorization and accounting. This is where the often unsung hero called RADIUS comes in.

RADIUS stands for Remote Authentication Dial In User Service. It has roots in the dial-up ISP heyday, but has matured into an incredibly powerful and mostly standardized framework that enables a range of “triple A” services. On the typical secure WLAN, a good RADIUS implementation is the key to good user experience, minimal help desk calls and peace of mind for the ranking organizational security wonk.

At the building block level, RADIUS is made up of three pieces. The supplicant lives at the client device, and is usually thought of as the “wireless configuration” when we’re talking RADIUS and Wi-Fi. The second important part is the authenticator, which is a function of either the wireless access point or the controller, depending on the WLAN system architecture. The final piece is the authentication server, or the RADIUS server. Combine these in the right configuration, and users are either let on or denied access to the WLAN depending on credential validity, and encryption keys are set up for every session (if not every packet, depending on specifics of Implementation).

I’ve seen countless organizations agonize about how to roll out an 802.1x-secured wireless environment using RADIUS as the cornerstone of enterprise wireless security. Usual pain points? What specific RADIUS server to use and which EAP, or Extensible Authentication Protocol, type (drives complexity, client settings and overall security level) to go with. If you’re new to this part of the wireless game, you’ll need to do some introspection to reach the conclusion that works for you.


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