Chapter 20. Implementing IPsec Site-to-Site VPNs

This chapter covers the following subjects:

• Planning and preparing an IPsec site-to-site VPN

• Implementing and verifying an IPsec site-to-site VPN

In the previous chapters, you learned about the benefits of virtual private networks (VPN) and the protocols and methods used to implement those benefits, such as encryption for confidentiality, hashing for data integrity, and authentication for peer verification. You have also seen examples of these protocols, such as Triple Digital Encryption Standard (3DES) and Advanced Encryption Standard (AES) for encryption, message digest 5 algorithm (MD5) and Secure Hash (SHA) for data integrity, and pre-shared keys (PSK) or RSA signatures (also known as ...

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