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Identity Based Networking Services (IBNS) December TechChat – Technology Foundation: Part II

November 25, 2008 at 12:00 pm PST

This is part II in the series of technical foundation posts leading up to our December 11th TechChat “Networks That Know You: Cisco Identity-Based Networking Services”.


Chances are, you got authenticated today. If you withdrew money from an ATM, swiped your employee badge or joined a secure wireless network, then you provided a valid form of identification to prove who you were. Once authenticated, you were authorized for some kind of access: to your money, a building or a wireless network. The one time you might not have been authenticated was when you plugged into the wired Ethernet port in your cube. IEEE 802.1X, the protocol designed specifically to authenticate users and devices at the access edge, is not ubiquitous on wired switches. One of the reasons is that 802.1X requires a client, called a”supplicant,” to carry out the authentication. Without a supplicant, a device cannot get access. That’s not a flaw in 802.1X -it’s the purpose of 802.1X: keep unauthenticated devices off the network.So what can be done about legacy devices that do not support 802.1X? One option is to un-configure 802.1X on ports connected to devices that are not capable of 802.1X. Besides being a nightmare for the IT administrator (“œhey, what port was that printer on again?”), it is also not very secure: an intruder could simply unplug the non-802.1X-capable device and voila! -total access to the corporate network. Clearly, this is sub-optimal. Better solutions leverage the intelligence of the network to automate the process of getting non-802.1X-capable devices on the network. Until now, Cisco’s Identity-Based Networking Services (IBNS) has offered three solutions:1) Configure the switch to attempt 802.1X and, if there is no response, automatically enable the port into a special VLAN (the”Guest VLAN”) with configurable access to the corporate network. With this solution, you could at least use the same configuration on every port, thus lowering the administrative overhead. However, you still have a problem: non-802.1X capable managed assets (such as printers, IP cameras) would have exactly the same access as guests or even rogue devices. Guest VLAN alone cannot provide differentiated network access for different kinds of non-802.1X-capable devices.2) Configure the switch to learn the MAC address of the connected device and validate that against a corporate identity store after 802.1X times out. This technique is referred to as MAC Authentication Bypass (MAB). Devices with known MAC addresses can be granted access to the corporate network while unknown MAC addresses can be denied access or dropped into the Guest VLAN as a fallback. In addition, because the switch queries an external identity store, MAB results in a centralized record of every device that attempts to connect to the network (giving it more visibility than a pure Guest VLAN approach where the switch simply allows the device onto the network). Of course, MAB requires an up-to-date database of the MAC addresses of every managed device on the network-which, of course, every organization has-or do they?3) Configure the switch to provide a login web-page if the device does not respond to 802.1X requests. This is sometimes called Web-Auth or captive portal. This approach only works for devices with web browsers operated by users who can manually enter usernames and passwords. Web-Auth doesn’t do much good for printers. Fortunately, MAB and Web-Auth can be configured together so that devices that fail MAB can be offered Web-Auth as a final option. Organizations that have successfully deployed 802.1X on their wired networks have used one or more of these solutions to support non-802.1X-capable devices. However, even with these features, it is not always smooth sailing. For starters, have you been wondering how the switch determines there is no supplicant on the attached device? The answer is simple: the switch asks if there is a supplicant on the wire and then it waits. Only after a timeout can MAB and/or Guest VLAN or Web-Auth do their work. This may result in significant delays in network connectivity and thus impair productivity.To address these and other concerns, newly announced IBNS features will complement the existing solutions to smooth the deployment of 802.1X in wired networks. We’ll discuss these features in our IBNS Second Life Techchat on December 11.Written by Shelly Cadora, PhD* *Shelly will be one of our speakers during the December Cisco Live in Second Life TechChat. She is a technical marketing engineer for Identity-Based Networking solutions. She is a 10 year Cisco veteran with a CCIE in Routing and Switching (#16318). Prior to becoming involved with Identity and 802.1X, she was involved in the development of the ASA firewall and Cisco IP Telephony solutions.

Searching Cisco from your Browser UI

November 21, 2008 at 12:00 pm PST

Here’s a neat idea that we’d like your feedback on. We have set up a simple search plug-in that works in Internet Explorer and Netscape.The way it works is that you can add it to you browser and then use the search pulldown built into your browser to search Cisco.com even if you’re not right on the site.imageWe’ve set up a page that explains how it works and how you can play with the options. If there is interest, we will probably do a final implementation that could be added as a plugin to your browser from any page.There’s a conversation on the NetPro Idea Center where you can join a conversation about the ins and outs of the plug-in.Enjoy!

Watch the Archived Cisco AXP: Your Open Developer Platform – Cisco Live in Second Life TechChat

November 20, 2008 at 12:00 pm PST

This TechChat featured Srinivas Kotamraju, Solutions Marketing Manager in the Network Systems Marketing Team, and Anurag Gurtu, Technical Marketing Engineer currently focusing on the Cisco integrated services router platform, both at Cisco. In addition Georges Boutros, Partner Development Manager with Sagem-Interstar will discuss the XMediusFAX Fax over IP (FoIP) solution suite. During this TechChat, Kotamraju and Gurtu will talk about how to use Cisco’s integrated services router platform to create innovative applications and explore potential business opportunities.View this archived discussion to learn about the Cisco Application Extension Platform (AXP):* How it allows you to easily integrate the branch network, applications, and IT infrastructure, therefore increasing your operational efficiency and lowering TCO.* Capabilities include a Linux hosting environment, support libraries, a software development kit, and more.* Hear about existing solutions developed by Cisco partners on the AXP.Click play below to watch the archive.To learn more about the Cisco Application Extension Platform (AXP) go to:The Cisco AXP OverviewIntroduction to the Cisco AXPThink Inside the BoxCisco Application Extension Platform presentation (PDF -- 6 MB)We need your feedback. Please complete a brief survey on the Nov 20th event.

Identity Based Networking Services (IBNS) December TechChat – Technology Foundation: Part I

November 17, 2008 at 12:00 pm PST

One of our speakers for the “Networks That Know You: Cisco Identity-Based Networking Services” December 11, noon Pacific Cisco Live in Second Life TechChat will be writing a series of blog posts to lay the foundation regarding the relevant technologies for the event. The hope is that this will expedite relevance for all attendees and stimulate a more immersive discussion during the live TechChat.Below is the first in this series focusing on 802.1X.


Has this ever happened to you? You’re visiting a customer or a vendor and the security guard insists that you leave your laptop with him while you’re inside the building. Or perhaps you are allowed to keep your laptop on the condition that you only plug into the yellow wall jacks labeled “Visitor.” In both situations, the end goal is the same: companies are trying to prevent unauthorized access to the network and networked resources. The first solution, though effective, is Draconian in its effect on productivity: why have a mobile device if you can’t get any work done when you’re on the road? The second solution has less impact on productivity, but there’s less security and no visibility. Once you’ve been let loose in the building, the honor system is all that keeps you from plugging into a green wall jack and gaining full access to the corporate network. At that point, there is no way to monitor what you are doing on the corporate network: all the IT administrators know is that you’re”supposed to be” in the yellow jack. Moreover, application level security is not enough to protect corporate assets from such accidental (or deliberate) incursions. Some legacy applications cannot be fully secured at Layer 7 and there are plenty of other vulnerable targets on the network.Fortunately, there is another way: leverage the intelligence of the network to identify each user as they come onto the network and dynamically grant the appropriate level of access to that user. This is the founding premise of Identity-Based Networking Services (IBNS), a Cisco solution for identity-based network access control. IBNS starts with 802.1X, an IEEE specification that describes how to authenticate users and devices in order to provide port-based access control. An 802.1X-enabled port drops all traffic until the connected device provides valid credentials. The only traffic allowed through the port is Extensible Authentication Protocol (EAP). EAP is a layer 2 protocol that allows devices to send passwords, certificates or tokens to authenticate themselves to the network. Once authenticated, the port is opened to other kinds of traffic, subject to the dynamic security policy that has (optionally) been applied to the port. image If it’s that effective, you may ask, why isn’t everyone doing 802.1X? The answer is -they are-on wireless networks. The adoption of 802.1X on wired networks has been slowed by several factors, not the least of which is that many legacy devices assume network connectivity at link-up and/or cannot support an 802.1X client (also called a”supplicant”). In a pure 802.1X environment, these devices would never be able to gain access to the network. Talk about a productivity hit! Asking visitors to leave their laptops with the security guard looks like small potatoes if the alternative is having all printers offline. Therefore, IBNS starts with 802.1X but it cannot end there. Deploying 802.1X in real-world wired networks requires a rich set of features that allows the network to enforce identity-based access control for all devices: printers, PCs, IP phones, guests, and so on. IBNS is an end-to-end solution that provides these features, making 802.1X a reality for wired networks. In future blogs, we’ll talk more about these features and how to deploy them to make any 802.1X implementation faster and simpler. We’ll also discuss new ways to control and customize users’ access to the network.Written by Shelly Cadora, PhD**Shelly will be one of our speakers during the December Cisco Live in Second Life TechChat. She is a technical marketing engineer for Identity-Based Networking solutions. She is a 10 year Cisco veteran with a CCIE in Routing and Switching (#16318). Prior to becoming involved with Identity and 802.1X, she was involved in the development of the ASA firewall and Cisco IP Telephony solutions.

Best of Virtual News : IMO

November 14, 2008 at 12:00 pm PST

I got a ping recently asking me to post more consistent blogs recapping my take on the top five virtual world announcements. The requestor was asking for a weekly recap-to which I replied ‘gulp, how about we start off with monthly’? So without further ado-here is my take on the announcements within the last (ok this blog will be more like a 6 week review) month in no particular order.1) Google Earth Gets “4D” Capabilities And Revives Ancient RomeI think the idea of being able to be immersed in a historic space to teach, explore, learn, or play will change the way different cultures view one another, increase the future generation’s awareness of the importance of world history and offer the opportunity for people who can’t travel to still immerse themselves in a place in time. How cool is that? Way, imo.2) Virtual Reality Helps War Heroes Recover From BurnsThis is one of the more heart warming uses of virtual reality, burn patients wear virtual reality goggles and immerse in a game called”Snow World’ (natch) to take there mind off of painful treatments they endure. Watch the below clip and see for yourself!VR has come a long way baby-3) A Realer Virtual WorldIn April we had a TechChat on the Internet of Things (which you can watch below) a concept of a world where inanimate objects communicate with us and one another over the network via tiny intelligent object. Recently Forbes wrote an article on an effort MIT has underway to build sensors designed to tie real and virtual worlds together. “These devices are designed to be like wormholes that let you tunnel through to a second reality,” says Joe Paradiso, MIT. “Second Life is detached. We’re tying it into the real world.”Sign me up for a badge ASAP!4) NASA Selects 3 Proposal Teams for Learning Virtual WorldBeing a space junky (yeah, shuttle launch tonight!) I paid attention when NASA announced they where creating a Massively Multiplayer Online Game (MMO). In late October NASA announced that they have whittled it down to three players who will present at Goddard Space Station, and yes I am jealous. You may ask why would NASA create an MMO? They sum it up well on their site,”The power of games as educational tools is rapidly gaining recognition. NASA is in a position to develop an online game that functions as a persistent, synthetic environment supporting education as a laboratory, a massive visualization tools and collaborative workspace while simultaneously drawing users into a challenging, game-play immersion.” Nuff said ;-) 5) Second Life Opens New World of Opportunity to Ontario StudentsThis article discuss how educators are using Second Life, blogging and other web 2.0 type tools to disrupt the normal learning process and engage more deeply with their students. This one is near and dear to our heart as well here at Cisco as we are passionate about technology and learning. In March we held a Second Life TechChat on Learning 2.0 which you can watch below, excuse the audio as it isn’t the best quality. Empowering teachers and students with technology-simply rules.I didn’t include one of my own posts — cause that would be totally shameless pandering, unlike what follows — about our Cisco Live in Second Life TechChat on the open developer Cisco Application Developer Platform taking place on November 20, 2008. We had our rehearsal today for this one and I think it is going to be a very interesting discussion. At the last moment we were happily able to add an external speaker to the mix. Corey Wilson is a Product Specialist at Sagem-Interstar for the XMediusFAX Fax over IP (FoIP) solution suite and he will discuss the new XMF SP and its use of the AXP interface to replicate faxes back to the data center based on available bandwidth. I encourage all you Linux developers to come out and explore the opportunities AXP offers and learn more about the Think Inside the Box contest now under way. We hope you can join us for this discussion in Second Life or on the web via this blog.Is there a piece of virtual worlds news that you think should have made the list? I don’t doubt it and encourage you to comment accordingly.