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Chapter 15 Private WANs with Internet VPN (Public WAN - Internet VPN…
Chapter 15 Private WANs with Internet VPN
Technologies for Internet Access
Private WANs
MPLS VPN
Metro Ethernet
TDM (T3, E3)
Public (Internet) WANs
Cable Internet
Wireless WAN (3G, 4G, LTE)
Fiber Internet Access
DSL
Public WAN - Internet VPN
Important features to provide
Confidentiality (privace) - not readable
Authentication - sender verification
Data integrity - no change in data
Anti-replay - copying and replaying the packets
Advantages
Low cost
Internet is everywhere
Secure communication
2 types
Site-to-Site VPNs with IPsec
2 math formulas - 1 to encrypt and 2 to decrypt data
Use session / encryption / shared /shared session key
Client VPN with SSL
For WEB surfing (alternative to IPsec), between Web Browser and Web Server
For all traffic (SSL with Cisco Any Connect), between AnyConnect and ASA