Chapter 6

Tunneling

Configuration System Tunneling Protocols

Configuration System Tunneling Protocols

This section lets you configure the IPSec tunneling protocol.

Click IPSec on the Tunneling Protocols screen.

Figure 6-1 Configuration System Tunneling Protocols Screen

Configuration System Tunneling Protocols IPSec

The VPN 3002 complies with the IPSec protocol and is specifically designed to work with the VPN Concentrator. IPSec provides the most complete architecture for VPN tunnels, and it is perceived as the most secure protocol.

In IPSec terminology, a “peer” is a remote-access client or another secure gateway. During tunnel establishment under IPSec, the two peers negotiate Security Associations (SAs) that govern authentication, encryption, encapsulation, key management, etc. These negotiations involve two phases: the first phase establishes the tunnel (the IKE SA); the second phase governs traffic within the tunnel (the IPSec SA).

The VPN 3002 initiates all tunnels with the VPN Concentrator; the VPN Concentrator functions only as responder. The VPN 3002 as initiator proposes SAs; the responder accepts, rejects, or makes counter-proposals—all in accordance with configured SA parameters. To establish a connection, both entities must agree on the SAs.

The Cisco VPN 3002 supports these IPSec attributes, but they are configurable on the central-site VPN Concentrator, not on the VPN 3002:

Main mode for negotiating phase one of establishing ISAKMP Secure Associations (SAs) (automatic if you are using certificates)

Aggressive mode for negotiating phase one of establishing ISAKMP SAs

Authentication Algorithms:

ESP-MD5-HMAC-128

ESP-SHA1-HMAC-160

Authentication Modes:

Preshared Keys

X.509 Digital Certificates

Diffie-Hellman Groups 1 and 2

Encryption Algorithms:

VPN 3002 Hardware Client Reference

6-2

OL-1893-01

 

 

 

Page 62
Image 62
Cisco Systems VPN 3002 manual Configuration System Tunneling Protocols IPSec

VPN 3002 specifications

Cisco Systems VPN 3002 is a versatile hardware device designed to provide secure remote access to corporate networks. As part of Cisco's family of VPN concentrators, the VPN 3002 is aimed at small to medium-sized businesses seeking to establish secure communications over the Internet.

One of the key features of the VPN 3002 is its ability to support a wide range of VPN protocols, including IPsec and L2TP. This flexibility allows businesses to tailor their security solutions to meet specific needs, thereby ensuring robust encryption and integrity for data in transit. The device also supports innovative technologies such as Clientless SSL VPN, enabling users to access corporate resources without the need for a full client installation.

Another vital characteristic of the VPN 3002 is its scalability. It can support multiple users while maintaining optimal performance due to its integrated firewall capabilities. This functionality allows organizations to manage user traffic effectively, ensuring that both security and efficiency are maintained during peak access periods.

Additionally, the VPN 3002 boasts advanced features like NAT traversal, which helps ensure that VPN connections can penetrate network address translation firewalls and other similar devices, thereby enhancing connectivity. It also features strong authentication mechanisms, including support for RADIUS and TACACS+, providing businesses with the ability to implement stringent user verification processes.

The device is designed with ease of use in mind. The setup process is relatively simple, and Cisco's intuitive web-based management interface makes it easy to configure and monitor VPN connections. Furthermore, the VPN 3002 comes with a variety of integrated tools for logging and reporting, allowing administrators to maintain comprehensive oversight of network activities.

In terms of hardware, the VPN 3002 is equipped with multiple Ethernet ports for network connectivity and can support a range of configurations to meet diverse organizational requirements. Its robust design ensures longevity and dependable operation, making it an ideal solution for businesses seeking reliable remote access capabilities.

In conclusion, Cisco Systems VPN 3002 provides a comprehensive solution for organizations looking to secure their remote connections. With its support for various protocols, scalable architecture, advanced security features, and ease of use, it stands out as a reliable choice for enhancing corporate network security.