CISCO VPN TECHNOLOGY:

VPNs, or Virtual Private Networks, allow users to securely access a private network and share data remotely through public networks. Much like a firewall protects your data on your computer, VPNs protect it online.

A VPN (virtual private network) is a private network constructed within a public network infrastructure, such as the global Internet. Businesses can use a VPN to securely connect remote offices and remote users using cost-effective, third-party Internet access, instead of expensive, dedicated WAN links or long-distance remote dial links.

Organizations can use a VPN to reduce WAN bandwidth costs, while increasing connectivity speeds by using high-bandwidth Internet connectivity, such as DSL, Ethernet, or cable.

A VPN provides the highest possible level of security through encrypted IP Security (IPsec) or Secure Sockets Layer (SSL) VPN tunnels and authentication technologies. These protect data traversing the VPN from unauthorized access. Companies can take advantage of the easy-to-provision Internet infrastructure of the VPN to quickly add new sites or users. They can also dramatically increase VPN reach without significantly expanding infrastructure.

COMMON VPN TUNNELING TECHNOLOGIES

L2TP (LAYER 2 TUNNELING PROTOCOL)

GENERAL VPN SECURITY CONSIDERATIONS

COMMON SECURITY FEATURES IN VPN PRODUCTS

GRE(lab)

IPSEC (lab)

DMVPN PHASE 1,2 & 3 (lab)

VRF lite (L2 MPLS vpn)