VPN

Creating an encrypted tunnel.

VPN

Components

  • VPN client
  • Network access server
  • Tunnel terminating device
  • VPN protocol

Types

  • Remote Access: Device-to-net
  • Site-to-site: Net-to-net

VPN-Enc[1]

Data encapsulated by L2TP/IPSec/TLS.

Encryption Protocols used in VPN

  • 3DES
  • Secure socket layer
  • OpenVPN

Firewall managing technologies

  • VPN Firewalls: front/back of the VPN server. HD/SW.
  • IPSec: Enc/Decryption of data
  • AAA server: stands for authn, autho, and accounting
  • RADIUS: Authenticate a VPN user imitates VPN con by credentials

RADIUS

Topologies

  • Hub-and-spoke
  • Point-to-point
  • Full mesh
  • Star