This chapter introduces the concepts of site-to-site virtual private networks using Cisco IOS features and covers the following topics:
• Concepts, technologies, and terms that IPsec VPNs use
• Site-to-site IPsec VPN configuration using the command-line interface
• Site-to-site IPsec VPN configuration using Cisco Security Device Manager
The IP Security (IPsec) virtual private network (VPN) is an essential tool for providing a secure network for business communication. This chapter addresses the different protocols and algorithms that IPsec uses and the different security services that IPsec provides. This chapter ...