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Old 10-01-2004, 01:02 AM   #1
AuroEdge
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Default VPN

Well, recently I was looking at routers and came up with http://www.newegg.com/app/ViewProduc...124-003&depa=0 which is basically the same as http://www.newegg.com/app/ViewProduc...124-001&depa=0 except it offers VPN capabilities. I'm new to networking, and am curious what a VPN is? All I know is that VPN stands for Virtual Private Network. Is VPN sort of like VNCs?

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Old 10-01-2004, 12:34 PM   #2
cipher
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Default Re: VPN

A Virtual Private Networks are set up over untrusted networks to secure the data flow within them. Basically, they allow for a trusted connection to be established into a secure network through any given untrusted network. Most often, the secure network is owned by some large organization (business, education, gov, etc.)

VPNs allow data travelling 'wthin' them to meet the CIA of security. Confidentiality (only the person meant to see the data sees it), Integrity (data arrives intact without any chance of outside tampering) and Authentication (data is arriving from who/where it says it is.) Generally, if data meets these three standards, it is considered to be secure, which is what VPNs are for.

Generally, the reason VPNs are set up is because a given organization has a large number of individuals who need to access that organization's inernal network (remote desktop, server administration, etc.) and VPN is they're the cheapest option outside of purchasing a second physical pipe into a network for the sole purpose of securing it for incomming connections. It takes advantage of existing network infrastructure.


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Old 10-01-2004, 10:28 PM   #3
AuroEdge
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Default Re: VPN

I guess what I'm asking is, how does a VPN work? I know if I wanted to run one I'd need to set up my computer with a router with VPN capabilities, and then to use it remotely I'd use Netgear or Citrix. But, what are the mechanics of it? I'm thinking that it's like a VNC in that it streams video of what's on the screen on the PC on the VPN to the remote PC, but it runs input (mouse and keyboard) through a seperate connection to cut down on lag?

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Old 10-02-2004, 04:46 PM   #4
cipher
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Default Re: VPN

> But, what are the mechanics of it? I'm thinking that it's like a VNC in that it streams video of what's on the screen on the PC on the VPN to the remote PC, but it runs input (mouse and keyboard) through a seperate connection to cut down on lag?

No. VPN is only a means of connecting to a secure *network*, nothing to do with individual PCs or connecting to them in and of itself. All VPN does is grant you access to another network.

The best and simplest example I can think of is this. A VPN connection simulates you taking a PC and physically connecting it to whatever secure network you are connecting to via VPN.
e.g. It'd be like me taking my PC, running a super-long ethernet cable from my home to my job and plugging it into the network there. It's more or less the same thing, except it uses the internet as my super-long ethernet cable, and the VPN implements CIA to simulate the security of a physical connection to the network.


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Old 10-02-2004, 05:25 PM   #5
AuroEdge
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Default Re: VPN

> e.g. It'd be like me taking my PC, running a super-long
> ethernet cable from my home to my job and plugging it into
> the network there. It's more or less the same thing, except
> it uses the internet as my super-long ethernet cable, and
> the VPN implements CIA to simulate the security of a
> physical connection to the network.

Ah I think I get it now. I talked to an IT last night for about an hour about networking and such. So basically a VPN is basically used to secure access from one network to another (whether it be one remote computer to a network or 1000 remote computers to a network).

My next question is, is it a lot more secure to have say a router be the VPN server, or is it almost as secure to run a VPN server application on your computer? I'm guessing it'd be more secure to run a VPN router (like the $100 Linksys Router currently at NewEgg.com).

Finally, to connect to a VPN Server, you use a Client Application right? What are some good ones to use? My needs would basically be able to share files and to share desktops (these could be fulfilled by using an FTP program and TightVNC to VNC into my computer). I think Cisco's VPN Client allows you to 'share desktops' like a VNC does, but I'm not sure.

Thanks for everybody's information!

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