Tunnel vision: Choosing a VPN -- SSL VPN vs. IPSec VPN

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IPsec VPN Overview
The strength of the technique is that it allows participants to create the secret value over an unsecured medium without passing the secret value through the wire. IPSec Transport mode is used for end-to-end communications, for example, for communication between a client and a server or between a workstation and a gateway if the gateway is being treated as a host. This is a viable technique for small, static networks where the distribution, maintenance, and tracking of keys are not difficult. Because they operate at the session layer, SSL VPNs can filter on and make decisions about user or group access to individual applications ports , selected URLs, embedded objects, application commands and even content. Policy distribution and maintenance are often hamstrung by user mobility and intermittent connectivity.

Overview of VPNs and VPN Technologies

Understanding VPN IPSec Tunnel Mode and IPSec Transport Mode - What's the Difference?

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This means IPSec wraps the original packet, encrypts it, adds a new IP header and sends it to the other side of the VPN tunnel (IPSec peer). Tunnel mode is most commonly used between gateways (Cisco routers or ASA firewalls), or at an end-station to a gateway, the gateway acting as a proxy for the hosts behind it/5(). Oct 11,  · Disadvantages of IPsec VPN Site-to-Site Tunnels A few disadvantages of using IPsec VPN site-to-site tunnels are: Expensive router is required at each site to play the role of the VPN server. IPSec VPNs can support all IP-based applications--to an IPSec VPN product, all IP packets are the same. SSL VPN application services vary, because each product has its own way of presenting client interfaces through browsers, relaying application streams through the gateway, and integrating with destination servers inside the private network.