VPN

VPN

1. Security

   • Trusted
     • All traffic on the VPN relies on the security of a provider's network to protect the network
   • Secured
     • All traffic on the VPN must be encrypted, authenticated and then sent along virtual tunnels
   • Hybrid
     • Combination of secure + trusted technologies

2. Structure

   • Remote Access
     • User-to-LAN connection used by the company for employees to connect to private network remotely
   • Site-to-site (Extranet)
     • When the company has a close relationship with another company (e.g. partner, supplier, customer) they can build an extranet VPN that allows all the various companies to work in a shared environment
   • Site-to-site (Intranet)
     • Used when the company has 1+ remote locations that they wish to join in a single private network

3. Tunneling

   • Protocols
     • PPTP (Point to Point Tunneling Protocol)
     • L2TP (Layer 2 Tunneling Protocol)
       • A protocol with 2 layers of encapsulation (PPP frame wrapped in IP datagram and IPsec Encapsulating Security Payload (ESP)), and encrypted with IPsec encryption algorithm
     • OpenVPN
     • Wireguard
     • a set of rules or procedures for transmitting data between electronic devices, such as computers
   • Technologies
     • Encapsulation
       • IPsec
     • Encryption
   • Authentication
     • Verifying the identity of a user, process, or device, often as a prerequisite to allowing access to resources in an information system
   • A process where data is securely transported from one device/network to another through a non-secure environment (e.g. Internet) without compromising privacy