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Router/route authentication, authorization, and accounting (such as Password Authentication Protocol [PAP]/

Challenge Handshake Authentication Protocol [CHAP])

Network Address Translation (NAT)

Token Card authentication with Cisco Secure authentication

NAT eliminates the need to re-address all hosts with existing private network addresses and hides internal addresses

from public view. For businesses that want to allow selected access to the network, NAT can be conﬁgured to allow

only certain types of data requests such as Web browsing, e-mail, or ﬁle transfers.

—Enhanced Security

Dynamic Firewall — Companies increasingly rely on internal networks and servers for accessing company data. To

leverage the Internet as a key business tool, companies must connect their internal networks to the Internet while

keeping sensitive internal data secure. Company data can be protected against unauthorized access with stateful

ﬁrewalls. The integrated Cisco IOS Firewall Feature Set is a stateful ﬁrewall that provides:

Stateful (dynamic) ACLs (application/context based)

Java blocking

Denial of service attack detection and prevention

Real-time alerts and audit trails

Dynamic ﬁrewalls provide these vital enhanced security features. The term ﬁrewall is used by many vendors but not

uniformly referred to as stateful ﬁrewalls. Firewalls that are not dynamic do not provide these enhanced security

features.

• Encryption and Tunneling

The Cisco 800 series routers provide IPSec encryption technology to enable small ofﬁces and telecommuters to deploy

VPNs. IPSec encryption provides privacy, integrity, and authenticity for transmission of sensitive information over the

Internet. The unique end-to-end Cisco offering allows customers to implement IPSec encryption transparently into the

network without affecting individual PCs. The 800 series with IPSec encryption allows signiﬁcant cost savings by using

the Internet to create secure connections between small ofﬁces and teleworkers. As a component of the Cisco VPN

solution, the Cisco 800 series supports:

IPSec tunneling with data encryption standard (DES)

Layer-2 Tunneling Protocol (L2TP)

Generic Routing Encapsulation (GRE)

• Manageability

The Cisco 800 Series supports management by a wide range of platforms and applications. Cisco ConﬁgMaker and

Cisco Fast Step (Windows 95, 98, and NT 4.0), and CiscoView (UNIX) applications provide superior capabilities for

conﬁguration and security management, as well as performance and fault monitoring. The Cisco 800 Series supports

centralized administration and management via Simple Network Management Protocol (SNMP), Telnet, or local

management through the router’s console port.

• X.25 over the D Channel

The Cisco 800 Series supports International Telecommunications Union (ITU)-compliant X.25 service over the ISDN D

channel. With this feature, the Cisco 800 Series cost-effectively supports transaction-oriented applications such as point-

of-sale (POS) authorizations. The X.25 feature also allows users to take advantage of unused capacity on the D channel.

The always on dynamic ISDN (AODI) technology in Cisco IOS software allows users to minimize call charges by

initiating the lower-bandwidth D channel in always-on mode when a user makes an ISDN connection. AODI activates

the more costly B channel only when a speciﬁc transmission requires more bandwidth. In addition, the Cisco 800 Series

X.25 feature includes priority queuing to improve the responsiveness of trafﬁc over this link.

• Dynamic Addressing

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