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The Cisco 1721 and 1720 routers offer integrated security features, including stateful inspection firewall
functionality and IDS as an optional Cisco IOS Software feature. By deploying Cisco IOS Software firewall
functionality, customers do not need to purchase or manage multiple devices, thus simplifying network management
and reducing capital costs.
Cisco IOS Software firewall security features include access control lists (ACLs), user Authentication, Authorization,
and Accounting (such as Password Authentication Protocol/Challenge Handshake Authentication Protocol [PAP/
CHAP], TACACS+, and Remote Access Dial-In User Service [RADIUS]). These security features provide the optimal
level of firewall protection to customers.
The Cisco 1700 Series routers support the Cisco Easy VPN Remote feature that allows the routers to act as remote
VPN clients. As such, these devices can receive predefined security policies from the headquarters' VPN head-end,
thus minimizing configuration of VPN parameters at the remote locations. This solution makes deploying VPN
simpler for remote offices with little IT support or for large deployments where it is impractical to individually
configure multiple remote devices. While customers wishing to deploy and manage site-to-site VPN would benefit
from Cisco Easy VPN Remote because of its simplification of VPN deployment and management, managed VPN
service providers and enterprises who must deploy and manage numerous remote sites and branch offices with IOS
routers for VPN will realize the greatest benefit.
The Cisco 1700 Series routers also support the Cisco Easy VPN Server feature that allows a Cisco 1700 router to act
as a VPN head-end device. In site-to-site VPN environments, the Cisco 1700 router can terminate VPN tunnels
initiated by the remote office routers using the Cisco Easy VPN Remote. Security policies can be pushed down to the
remote office routers from the Cisco 1700 router. In addition to terminating site-to-site VPNs, a Cisco 1700 router
running the Unified VPN Access Server can terminate remote access VPNs initiated by mobile and remote workers
running Cisco VPN client software on PCs. This flexibility makes it possible for mobile and remote workers, such as
sales people on the road, to access company intranet where critical data and applications exist.
Business-Class DSL
The Cisco 1721 and 1720 routers support business-class DSL through the optional ADSL or G.shdsl WICs.
The Cisco 1721 and 1720 business-class DSL solution combines the cost benefits of DSL service with the advanced
routing capability required for business use of the Internet. Through enhanced DSL QoS features, performance levels
for mission-critical applications are guaranteed. (See Figure 2.)
Figure 2
The Cisco 1700 Series Deployed with an ADSL WIC
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