Why VPN can't replace Wi-Fi security

Model: FVS318N

VPN Firewalls
Add to compare Model: A buddy of mine, as well as myself, are photographers on top of all the other tech hobbies we have! Models with multiple WAN ports can operate in either a load-balancing or fail-over configuration. There are plenty how-tos on this forum. Any suggestions on the simplest yet secure way of accomplishing this? Columbitech Wireless VPN is built from the ground up and optimized for wireless applications.

Model: FVS318G

VPN solution for client to client backups?

This entry is also available as a PDF download. Wi-Fi is the common marketing name for I'm going to explain VPN and Wi-Fi security as best I can and why there is a right time and right place for each architecture.

It's a classic case of when all you have is a hammer, everything looks like a nail. Was WPA really cracked? What they're actually referring to is the fact that a certain simple mode of WPA designed primarily for home use , which uses PSK pre-shared keys , can be cracked when a simple, easy-to-guess PSK is in use.

A simple character alpha-numeric random PSK or greater will make it impractical to crack with dictionary attacks. I can just as easily point out that the same mistakes can be made in certain VPN deployments that also make use of pre-shared keys.

There is no question that WEP is completely broken beyond redemption. I've had sources familiar with that process tell me that stronger encryption algorithms were shunned for fear of Wi-Fi products being banned for export.

Not surprisingly, it took less than two years for the cryptographic researchers Fluhrer-Mantin-Shamir to demonstrate serious flaws with WEP.

But something designed in the late 90s for exportability should not be a permanent indictment of Wi-Fi security or the competence of the IEEE If that's the standard we're going to judge by, we can pretty much shun everything on the Internet.

Bad implementations should be shunned, not entire categories There are other bad implementations of VPN and Wi-Fi that have poorly designed authentication mechanisms. The argument should be made against poor cryptographic implementations, not against Wi-Fi security in general. For home mode, the use of multiple rounds of hashing makes dictionary attacks painfully slow and the implementation of a "salt" in the key rules out the use of pre-computed hash tables unless attacking a common SSID.

The enterprise mode of WPA calls for Encryption and authentication used in VPN vary depending on the implementation. If this sounds a lot like Wi-Fi security above, it's not your imagination -- the principles of cryptography are universal. When you're using a VPN connection, the connection to the LAN over the Internet doesn't happen until the user logs in and fires up the VPN client software and manually starts a connection.

With Wi-Fi security, it is possible to use machine authentication to securely connect the computer before the user even logs into the PC.

That means maintenance tasks like Windows Update, enterprise management tools, group policy updates prior to or during login, and new user login can all be supported.

When a user wakes and logs into a laptop, it automatically and instantly logs the user into the wireless LAN with no user interaction. Centralized management and distribution of Wi-Fi client configuration make Wi-Fi security very appealing to the enterprise.

In the network topology diagram above, we have a hybrid solution where both VPN and Wi-Fi security are deployed in an enterprise network. The VPN gateway provides encrypted connections to users coming from the Internet, while the access points more than one represented provide wireless LAN connectivity for local devices.

But embedded devices, like Wi-Fi VoIP phones, Wi-Fi label printers, and barcode scanners, aren't so fortunate; they aren't supported by this architecture. We dont use pptp but L2TP. Thanks for the share. So in this case you each run the server and the client? I'm trying to figureout how the setup actually works in your deployment. This is exactly how I have my network setup for my managed clients.

The only problem is that EdgeRouters are fairly limited in the speed they can reach because OpenVPN is not accelerated.

O, so the recommended option would be to just install the OpenVPN server on my media server and let that handle the tunnel? Will I get my true througput? I have a 10Mb up connection and he has a 20mb up connection. Would I assume the server should be hosted on his machine since he has the larger connection? It does not matter which side you host the server on.

The smallest common denominator rule applies here, which is your 10Mbit connection. You cannot jump higher than 10Mbit. I misread your message If he has 20Mbit up, and you have only 10Mbit, server should be hosted on your side, since he will be able to utilize his 20Mbit, but for you it will be almost lan speed minus the vpn overhead.

What are your download speeds? If yours is the same as his, than definately put the server on your side. I have 3 sites with dynamic IPs using dyndns.

I only needed to set up tunnels between site A - B and site A - C, all sites are connected ie site B and C can see each other without setting up a specific tunnel for them. I should add that 1 site is behind a bridged modem and 2 of the sites are behind isp supplied routers double NAT. The only issue is the double NAT sites needed a seperate method of updating dyndns I used the pc client.

Both backup machines connect to this server through VPN clients and see each other. He sends data to your backup server through his 20Mbits upload speed. You send backup to the same server with whatever local speed you get. But you also have to send backups to his backup server. So you send it with 10Mbit upload speed. Now assume you place a VPN server at his location. The same scenario applies. So it really does not matter where OpenVPN server is placed, since there are two backup servers that both of you need to be able to backup up to.

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