IPSec VPN - Fundamentals
A VPN, or Virtual Private Network, is a way to establish a tunnel between two endpoints, like two routers or two endpoints. VPN’s are used to provide a way of secure communication over an unsecure medium. A simple example would be secure communication between two branch offices over the unsecure internet. This is important because we need secure communication so that people can’t eavesdrop and steal important company information. Oftentimes, people misunderstand VPN's and think just because "private" is in the name that it's secure. This is not always the case, especially in the service provider world where there are different types of VPN's that do not provide any sort of encryption. IPSec VPN's do however provide encryption and other features. There are several different types of VPN’s that can be deployed. The most common ones are Site-To-Site and Remote Access, although there are many more and depending on the use case, the most common could be differe