![]() ![]() ![]() Yet IPSec's operation can be broken down into five main steps: IPSec involves many component technologies and encryption methods. IPsec supports network-level peer authentication, data origin authentication, data integrity, data confidentiality (encryption), and replay protection. IPsec uses cryptographic security services to protect communications over Internet Protocol (IP) networks. A secure policy for every peer must be manually maintained. IKE builds on the Oakley protocol and Internet Security Association and Key Management Protocol (ISAKMP), and uses a Diffie-Hellman key exchange to set up a shared session secret, from which cryptographic keys are derived. Internet Key Exchange (IKE) is the protocol used to set up a security association (SA) in the IPsec protocol suite. With this configuration a host in the remote site network of 122.166.12.x and a host in VLAN 1at the main office can communicate with each other securely. The following image shows a sample implementation of a Site-to-Site VPN tunnel using a RV-Series router (Remote Site) and an ASA 5500 (Main Office). Cisco ASA 5500 Series Adaptive Security Appliances Software Version.This short guide describes an example of the design for building a Site-to-Site IPsec VPN between RV series routers and an ASA 5500 Series Adaptive Security appliances and provides configuration examples. It combines the industry's most deployed stateful inspection firewall with comprehensive next-generation network security services, including: visibility and granular control of applications and micro-applications, web security, intrusion prevention systems (IPS), highly secure remote access, and others. The Cisco ASA 5500 Series Adaptive Security Appliances help organizations to balance security with productivity. The Cisco RV series routers deliver robust and easily managed VPN solutions to cost-conscious small business companies. All traffic between sites is encrypted using the IP Security (IPsec) protocol, and network features such as routing, quality of service (QoS), and multicast support are integrated. This smart tip covers site-to-site (point-to-point) VPN, which provides an Internet-based infrastructure to extend network resources to remote offices, home offices, and business partner sites. There are different VPN topologies: Hub and spoke, Point-to-point, and Full mesh. The motivations to use VPN are the requirements to "virtualize" some portion of an organization's communications and the economics of communications. VPNs increase security for a distributed organization, making it easier for staff to work from different sites without compromising the network. It enables a host computer to send and receive data across public networks as they were an integral part of the private network with all the functionality. A VPN extends a private network between geographically separate office locations. A VPN is private network constructed within a public network infrastructure, such as the global Internet. VPN security solutions are becoming more important for small and medium business companies. Security is essential to protect the intellectual property of a business while also ensuring business continuity and providing the ability to extend the corporate workplace to employees who need anytime, anywhere access to company resources.
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