VPN definition gets fuzzy
 
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A bunch of new companies are selling products they say compete with IP VPNs but are different, challenging the definition of what's a VPN.
For the purposes of this newsletter, the definition of a VPN has always been the network of secure links over a public IP infrastructure. Technologies that fit in this category included Point-to-Point Tunneling Protocol, Layer 2 tunneling protocol and IP Security.
Strictly speaking, the infrastructure may not actually be all IP. In places, the infrastructure may be frame relay or ATM carrying IP. But the experience of the end user is that traffic coming out of and going into the network is IP with no evidence that it is transported by some other technology in between.
But now, companies including Flatrock Neoters, Netilla, NetSilica and Yo.net are coming in with products that steal a piece here and there from IP VPN technology, as well as browser technology, and mix in technology of their own to support VPN-like connections. (See: www.nwfusion.com/news/2002/0121ssl.html)
NetSilica, for example, touts itself as a low-maintenance alternative to IPSec VPNs if you just want to access data securely over the Internet. It acknowledges that VPNs support a broader range of applications, but its argument is that you may not need support for anything other than accessing data. Apparently its competitors and the firms investing money in them feel the same way.
The point is that they may be right. At least their argument hangs together on paper. So we should all avoid getting locked into the notion that there is only one right way to build a VPN or one right VPN service to buy. Rightness is defined by what fulfills your needs.
So expect to see discussions of these other technologies here. And expand your own horizons when you consider VPNs. There may be alternatives that meet your networking needs and financial constraints better than the traditional VPN.
RELATED LINKS
Network World, 11/05/01
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Network World VPNs Newsletter, 01/02/02
RapidStream gets to the (Check) Point
Network World, 01/21/02
Vendors tout easier VPNs
Network World, 01/21/02
Tim Greene is a senior editor at Network World, covering virtual private networking gear, remote access, core switching and local phone companies. You can reach him at tgreene@nww.com.
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