Advanced Cisco Virtual Private Networks

Advanced Cisco Virtual Private Networks

1. VPN Benefits

   • Cost Savings
   • Compatibility
   • Security
   • Scalability

2. What is a VPN?

   • A VPN is a network virtual in that it carries information within a private network, but that information is actually transported over a public network.
     • remote-access VPN
     • site-to-site VPN

3. IPSec

   • Is a suite of protocols developed with the backing of the IETF to achieve secure services over IP packet-switched networks,
     • IPsec protects and authenticates IP packets between source and destination.
       • Confidentiality
         • encryption
           • AES
       • Integrity
         • hashing algorithms
           • md5
       • Authentication
         • Internet Key Exchange (IKE)
           • PSK
       • Diffie-Hellman (DH)
         • Secure key exchange
           • DH1
     • IPsec protocols are Authentication
       • Header (AH)
       • Encapsulation Security Protocol (ESP).

4. Hairpinning

5. Split Tunneling