7.6.4. Types of VPNs

Four noteworthy sorts of VPNs are being used today. One sort utilizes a router with included VPN capacities. VPN routers can deal with ordinary directing obligations, as well as be arranged to form VPNs over the Internet to other comparative routers, situated on remote networks. This strategy is utilized to make VPN WAN connections over the Internet, ordinarily between various organization areas.

Another significant kind of VPN is one incorporated with a firewall gadget. Most prevalent firewalls, for example, Check Point's Firewall-1 or WatchGuard's Firebox, serve as firewall gadgets, as well as VPN hosts. Firewall VPNs can be utilized both to bolster remote clients furthermore to give WAN VPN links. The advantage of utilizing a firewall-based VPN is that you can direct your network's security—including both standard firewall security and VPN security—totally inside the firewall. For instance, you could arrange the firewall to permit associations with the network just when they are made as a major aspect of a legitimate VPN association.

The third significant kind of VPN incorporates those offered as a major aspect of a network OS. The best case of this sort is Windows RRAS, and Novell's BorderManager application. These VPNs are frequently used to bolster remote access, and they are for the most part the slightest costly to buy and introduce.

The fourth real sort is the SSL VPN, a moderately new class. This is really my general most loved for remote access support. A SSL VPN exploits the Secure Sockets Layer (SSL) encryption innovation incorporated with most web programs to offer VPN services through the web browser. SSL is the same innovation used to encode data in site pages that utilization the http:// prefix, for example, for shopping or online banking sites.