Table Of Contents
Cisco IOS Software Release 12.3T New Features and Hardware
1) Introduction: Cisco IOS Software Release 12.3T
1.2) Release 12.3T Additional Information
2) Cisco IOS Software Release 12.3(14)T Highlights
2.2) Cisco IOS Software Infrastructure
2.4) Management and Provisioning
2.7) Multiprotocol Label Switching
3) Release 12.3(11)T Highlights
3.8) Embedded Network Management
3.9) IP Addressing and Services
4) Release 12.3(8)T Highlights
4.7) IP Addressing and Services
5) Release 12.3(7)T Highlights
5.6) Embedded Network Management
5.10) Multiprotocol Label Switching
6) Release 12.3(4)T Highlights
6.8) Embedded Network Management
7) Release 12.3(2)T Highlights
7.3) Embedded Network Management
8) Appendix: Release 12.3(8)T—New Feature Enhancements
9) Appendix: Release 12.3(7)T—New Feature Enhancements
10) Appendix: Release 12.3(4)T—New Feature Enhancements
11) Appendix: Release 12.3(2)T—New Feature Enhancements
11.1) Hardware Products and Modules Newly Supported in Cisco IOS Software Release 12.3(2)T
12) Appendix: Release 12.3(11)t—new Feature Enhancements
Product Bulletin, No. 2215
Cisco IOS Software Release 12.3T New Features and Hardware
This Product Bulletin introduces Cisco IOS Software Release 12.3T, and includes the following sections:
1) Introduction: Cisco IOS Software Release 12.3T
Cisco IOS® Software is the world's premiere network infrastructure software, delivering seamless integration of technology innovation, business-critical services, and hardware support. Currently operating on millions of active systems, from small home office routers to the core systems of the world's largest service provider networks, Cisco IOS Software is the most widely leveraged network infrastructure software in the world.
The Release 12.3T family will be issued as a series of individual releases, each of which will create significant new revenue opportunities and will include hundreds of business-critical features, the latest hardware support, and ongoing quality improvements. Cisco will ultimately consolidate all of these individual 12.3T releases to form a single major release.
With more than sixty new features, Cisco IOS Software Release 12.3(14)T extends the functionality and benefits of Cisco IOS Software.
Release 12.3(T) powers the new Cisco Integrated Services Routers, the first hardware/software system to deliver secure, wire-speed data, voice, video, and security services to small and medium-sized businesses, Enterprise branch offices, and Service Providers who offer managed services. By speeding application deployment and reducing operating complexity, customers realize a lower total cost of ownership.
Release 12.3(11)T, extends the benefits of Cisco IOS High Availability to the small and medium sized business and branch office by minimizing router downtime during planned or unplanned outages.
In order to maximize the value of the network, Cisco customers are continually integrating new technologies, hardware, and services into the existing infrastructure. In recognition of the challenges this can pose, Release 12.3(8)T delivers network intelligence with integrated features that secure branch office communications, automate the deployment of new applications, and optimize the flow of outbound traffic.
Release 12.3(7)T, the third release of this family, extends the robust suite of Cisco IOS Security capabilities with features that further reduce network vulnerability. The powerful new hardware support, enhanced security management capabilities, and enriched Cisco IOS Firewall functionality in Release 12.3(7)T protect sensitive data and corporate resources from malicious attacks.
Release 12.3(4)T, the second of the 12.3T releases, allows customers to leverage embedded Cisco IOS Software functionality to more easily deploy Security, Voice and Wireless applications. By enabling integrated small-scale deployment scenarios, Release 12.3(4)T provides the infrastructure for future expansion of small and medium business and Enterprise branch customers.
Release 12.3(2)T, the first of the 12.3T releases, greatly enhances customer productivity with nearly one hundred new features across more than thirty Cisco hardware products. Highlights of Release 12.3(2)T include the Cisco 830 Series Router and Cisco Security Device Manager.
Figure 1
Major Release and New Technology Release Relationship
1.1) Migration Guide
Cisco recommends that the customers who require features found in Release 12.2T upgrade to the latest version of Major Release 12.3 or 12.3T. Release 12.2T is scheduled for End of Sales on October 31, 2003. Software releases that End of Sales are no longer orderable, but are still available to customers under maintenance contract for downloading from Cisco.com and the Technical Assistance Center (TAC).
Figure 2 illustrates the migration path into Release 12.3T.
Figure 2
Release 12.3T Migration Path
Cisco IOS Software Release 12.3T will now continue to undergo an ongoing testing and review cycle to continuously improve and increase reliability and quality. Unlike the Major Release 12.3 family, Release 12.3T will integrate new features with every maintenance release. Release 12.3T will be updated via regular maintenance releases to include improvements resulting from the testing cycle. Maintenance for Release 12.2T ceased upon the introduction of Major Release 12.3 and 12.3T. Users of Release 12.2T should move to Major Release 12.3 or 12.3T in order to receive maintenance.
Each Cisco IOS Software new technology release is built upon the previous release. It adds new software features hardware support and software fixes for previous major releases and new technology releases. Release 12.3(4)T, for example, is built upon the existing functionality of Release 12.3(2)T. Customers interested in upgrading to Release 12.3T should determine their functionality needs and choose the corresponding release in the Release 12.3T family.
1.2) Release 12.3T Additional Information
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Release 12.3T Information
http://www.cisco.com/go/release123t/
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Release 12.3T Q&A
http://www.cisco.com/go/123tqa/
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Product Bulletin No. 2214, Cisco IOS Software Product Lifecycle Dates & Milestones
http://www.cisco.com/en/US/products/sw/iosswrel/ps5187/prod_bulletin0900aecd801eda8a.html
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Cisco IOS Software Center
Download Cisco IOS Software releases and access software upgrade planners.
http://www.cisco.com/public/sw-center/sw-ios.shtml
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Cisco Feature Navigator
A web-based application that allows you to quickly match Cisco IOS Software releases to features to hardware.
http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp
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Cisco Software Advisor
Determine the minimum supported software for selected hardware.
http://www.cisco.com/pcgi-bin/front.x/Support/HWSWmatrix/hwswmatrix.cgi
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Cisco IOS Upgrade Planner
View all major releases, hardware, and software features from a single interface.
http://www.cisco.com/pcgi-bin/Software/Iosplanner/Planner-tool/iosplanner.cgi
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Cisco IOS Software Questions and Feedback
http://www.cisco.com/warp/public/732/feedback/release/
1.3) Cisco IOS Packaging
Cisco IOS Packaging simplifies the image selection process by consolidating the total number of packages and using consistent package names across all hardware products.
Figure 3
Cisco IOS Packaging for Cisco Routers
2) Cisco IOS Software Release 12.3(14)T Highlights
Tables 1and 2 describe and identify the feature highlights of Cisco IOS Software Release 12.3(14)T.
2.1) Security and VPN
2.1.1) Cisco IOS Software Login Password Retry Lockout (per EAL4 Compliance)
Login password retry lockout conforms to the EAL4 requirement of providing these enhancements to Cisco IOS Software-enabled devices:
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The administrator will specify an optional number of attempted logins before lockout. The default value will be 3 (and configurable).
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When a user makes the specified (as configured in the preceding item) number of unsuccessful attempts to log in, that user will be locked out of the system until the administrator unlocks that user.
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Only the administrator or users with administrator-equivalent privileges are able to unlock users.
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Local AAA will maintain a list of locked-out users.
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This configuration is not user specific but is device (per-box) specific.
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Exception: The system does not allow the administrator to be placed on the locked-out list.
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The locked-out list will not be maintained by an external server such as a RADIUS server.
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The command-line interface (CLI) can be used to display a list of locked-out users by use of a show command.
Benefits
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Improves the security of the networking device.
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Helps the network administrator to prevent potential unwanted access to the networking device.
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Offers flexibility for the network administrator to allow networking device access that meets the security policies and industry standards of individual corporations.
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Provides audit trail of locked-out users for security risk assessment.
Hardware
Product Management Contact: ask-stg-ios-pm@cisco.com
2.1.2) Cisco IOS Firewall: HTTP Inspection Engine
Cisco IOS Firewall has been enhanced with the introduction of Advanced Application Inspection and Control. Often companies decide to permit common applications, such as Web browsing, through their firewalls. Unfortunately, such access can result in non-HTTP applications, such as instant messaging (IM), attempting to take advantage of hosts behind this opening in the firewall. Although traditional firewall enforcement blocks traffic based on source and destination addresses and protocol and port numbers, the Cisco IOS Firewall HTTP Inspection Engine enforces protocol conformance and prevents malicious or unauthorized behavior such as port 80 tunneling, malformed packets, and Trojans from passing through. The HTTP Inspection Engine gives Cisco IOS Firewall the intelligence not only to block non-HTTP traffic, but also to help ensure that traffic that is assumed to be HTTP is legitimate Web browsing and not IM or similar traffic trying to gain access through the firewall. The net result is that network administrators will have more granular control of applications passing through the firewall.
Benefits
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Defines and enforces security policies for port 80.
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Controls misuse of port 80 by rogue applications that tunnel traffic inside HTTP and use port 80 to avoid scrutiny.
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Performs protocol anomaly detection services.
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Detects misuse of HTTP and Web connectivity.
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Prevents protocol masquerading.
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Provides strict RFC compliance enforcement.
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Allows RFC command control (for example, get or put).
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Enforces URL-length and header-length policy.
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Supports real-time alarms and audit trail messages.
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Provides MIME-type filtering and content validation.
Hardware
Additional Information: http://www.cisco.com/en/US/products/sw/secursw/ps1018/index.html
Cisco IOS Packaging
The Cisco IOS Firewall HTTP Inspection Engine feature is positioned in the Advanced Security packages across Cisco routers ( Figure 3).
Cisco IOS Packaging Contact: Fariba Farniam ( ffarniam@cisco.com)
Product Management Contact: Hitesh Saijpal ( ask-stg-ios-pm@cisco.com)
2.1.3) Cisco IOS Firewall: Granular Protocol Inspection
With this feature, Cisco IOS Firewall can perform more granular protocol inspection of Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) traffic for most application types as defined in RFC 1700.
IP packets that contain most well-known ports defined in RFC 1700 plus user-defined ports and ranges that map to specific applications can be inspected. Additionally, the current Cisco IOS Firewall feature called Port-to-Application Mapping (PAM) has been enhanced to distinguish between TCP and UDP.
Benefits
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Greater flexibility by allowing more granularity in the selection of protocols to be inspected.
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Ease of use by providing for group inspection of multiple ports into a single, user-defined application keyword.
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Enhanced functionality with the addition of more well-known ports, user-defined applications, and user-defined port ranges.
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Improved performance and reduced CPU load resulting from focused inspection selections.
Hardware
Considerations
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A single port can only be mapped to one application.
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Port ranges cannot be specified directly in the ip inspect name command; the PAM table should be used instead.
Additional Information: http://www.cisco.com/en/US/products/sw/secursw/ps1018/index.html
Cisco IOS Packaging
The Cisco IOS Firewall Granular Protocol Inspection feature is positioned in the Advanced Security packages across Cisco routers ( Figure 3).
Cisco IOS Packaging Contact: Fariba Farniam ( ffarniam@cisco.com)
Product Management Contact: Hitesh Saijpal ( ask-stg-ios-pm@cisco.com)
2.1.4) Cisco IOS Firewall: Email Inspection Engine
Cisco IOS Firewall Advanced Application Inspection and Control features Inspection Engines to provide protocol anomaly detection services. This latest enhancement adds support for Post Office Protocol 3 (POP3) and Internet Message Access Protocol (IMAP) to the Email Inspection Engine in addition to the existing support for Simple Mail Transfer Protocol (SMTP) and Extended Simple Mail Transfer Protocol (ESMTP).
Benefits
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Inspects SMTP, ESMTP, POP3, and IMAP.
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Detects misuse of email connectivity.
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Prevents protocol masquerading.
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Enforces strict RFC compliance.
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Performs protocol anomaly detection services.
Hardware
Considerations
Users will need to have sufficient free memory.
Additional Information: http://.cisco.com/en/US/products/sw/secursw/ps1018/index.html
Cisco IOS Packaging
The Cisco IOS Firewall Email Inspection Engine feature is positioned in the Advanced Security packages across Cisco routers ( Figure 3).
Cisco IOS Packaging Contact: Fariba Farniam ( ffarniam@cisco.com)
Product Management Contact: Hitesh Saijpal ( ask-stg-ios-pm@cisco.com)
2.1.5) Cisco IOS Firewall: Inspection of Router-Generated Traffic
The Inspection of Router-Generated Traffic feature enables the inspection of local router traffic to single-channel TCP and UDP connections originated by or terminated at a router. Local H.323 connections are also supported.
Benefits
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Cisco IOS Firewall policy can now be applied to router local traffic.
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The inspection of local H.323 connections enables the deployment of Cisco CallManager Express and Cisco IOS Firewall on the same router with a simplified access control list (ACL) configuration of the Cisco CallManager Express interface through which H.323 connections are made.
Hardware
Considerations
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Inspection of Router-Generated Traffic is supported only on the following protocols: H.323, TCP, and UDP.
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Cisco IOS Firewall supports only Version 2 of the H.323 protocol.
Additional Information: http://www.cisco.com/en/US/products/sw/secursw/ps1018/index.html
Cisco IOS Packaging
The Cisco IOS Firewall Inspection of Router-Generated Traffic feature is positioned in the Advanced Security packages across Cisco routers ( Figure 3).
Cisco IOS Packaging Contact: Fariba Farniam ( ffarniam@cisco.com)
Product Management Contact: Hitesh Saijpal ( ask-stg-ios-pm@cisco.com)
2.1.6) Virtual Routing and Forwarding Aware Cisco IOS Firewall
Virtual Routing and Forwarding (VRF) Aware Cisco IOS Firewall applies Cisco IOS Firewall functionality to VRF interfaces when the firewall is configured on a service provider or large enterprise edge router. Service providers can provide managed services to small and medium business markets. VRF-Aware Cisco IOS Firewall supports VRF-aware URL filtering and VRF-lite (also known as multi-VRF customer edge [CE]).
Benefits
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Allows users to configure a per-VRF firewall. The firewall inspects IP packets that are sent and received within a VRF.
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Allows service providers to deploy the firewall on the provider edge (PE) router.
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Supports overlapping IP address space, thereby allowing traffic from nonintersecting VRFs to have the same IP address.
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Supports per-VRF (not global) firewall command parameters and denial-of-service (DoS) parameters so that the VRF-aware firewall can run as multiple instances (with VRF instances) allocated to various VPN customers.
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Performs per-VRF URL filtering.
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Generates VRF-specific syslog messages that can be seen only by a particular VPN. These alert and audit trail messages allow network administrators to manage the firewall; that is, they can adjust firewall parameters, detect malicious sources and attacks, add security policies, and so on.
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Supports the ability to limit the number of firewall sessions per VRF.
Hardware
Considerations
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VRF-Aware Cisco IOS Firewall is not supported on MPLS interfaces.
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If two VPN networks have overlapping addresses, VRF-aware NAT is required for them to support VRF-aware firewalls.
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When crypto tunnels belonging to multiple VPNs terminate on a single interface, per-VRF firewall policies cannot be applied.
Additional Information: http://www.cisco.com/en/US/products/sw/secursw/ps1018/index.html
Cisco IOS Packaging
VRF-Aware Firewall is positioned in the Advanced Security packages across Cisco routers ( Figure 3).
Cisco IOS Packaging Contact: Fariba Farniam ( ffarniam@cisco.com)
Product Management Contact: Hitesh Saijpal ( ask-stg-ios-pm@cisco.com)
2.1.7) Intrusion Prevention Systems Signature Enhancements
This release adds the TCP, UDP, and Internet Control Message Protocol (ICMP) signature microengines (SMEs) to the list of supported SMEs. This allows for Cisco IOS Software routers to defend networks against common worms and viruses such as the following:
Also included in this release is the local shun action. This can be configured on any signature. A shun places an ACL-type block on the interface from which the attacking traffic is entering the router to more quickly defend the network from attack traffic.
Benefits
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Support for more than 400 more signatures for a total of more than 1275 from which to choose.
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Increased efficiency for traffic blocking with shun action.
Hardware
Cisco IOS Packaging
IPS Signature Enhancements are positioned in the Advanced Security packages across Cisco routers ( Figure 3).
Cisco IOS Packaging Contact: Fariba Farniam ( ffarniam@cisco.com)
Product Management Contact: Tom Guerrette ( ask-stg-ios-pm@cisco.com)
2.1.8) Secure Device Provisioning Phase 4: Administrative Introducer
Secure Device Provisioning (SDP) Phase 4 allows an IT administrator to introduce and preprovision several end routers without the need of an end user. Administrative login and device specification have been introduced into the SDP framework.
SDP, formerly known as EZ Secure Device Deployment, simplifies introduction of a VPN device into the public key infrastructure (PKI) network. SDP mechanisms assume a permanent relationship between the introducer and the device. As a result, the introducer username is used to define the device hostname. Often the introducer username is used as the database locator to determine the Cisco IOS Software configuration template, template variables (pulled from the AA database and expanded into the template), and the appropriate subject name for the PKI certificates issued to the device.
In some deployment scenarios, the introducer is an administrator (or an administrative service such as a CiscoWorks VPN/Security Management Solution [VMS] or the Cisco IP Solution Center [ISC]) doing the introduction for many devices. In this situation, the administrator's username cannot be used as a database locator so the SDP GUI has been enhanced to provide the username as a separate parameter.
Figure 4
SDP Administrative Introducer
Benefits
Allows an IT administrator or security management solution to provision multiple devices.
Hardware
Cisco IOS Packaging
SDP Phase 4: Administrative Introducer is positioned in the Advanced Security packages across Cisco routers
( Figure 3).Cisco IOS Packaging Contact: Fariba Farniam ( ffarniam@cisco.com)
Product Management Contact: Jai Balasubramaniyan ( ask-stg-ios-pm@cisco.com)
2.1.9) Secure Device Provisioning Phase 4: Hierarchical Certificate Servers
PKI deployments have a certificate server that issues certificates to the nodes in the VPN installation. A root certificate server is a CA server that holds a self-signed certificate, and its key pair is the root of the trust associations (digital signatures in the certificates) of the whole VPN installation. Because the root RSA key pairs are extremely important in a PKI hierarchy, it is often advantageous to keep them offline or archived. To support such an arrangement, PKI hierarchies allow for subordinate certificate authorities that have been signed by the root authority. In this way the root authority can be kept offline (except to issue occasional Certificate Revocation List [CRL] updates) and the sub-Certificate Authority (sub-CA) can be used during normal operation.
Figure 5
SDP Hierarchical Certificate Server
Benefits
•
Allows for hierarchical certificate servers, ensuring better scalability and availability.
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Simplifies PKI deployment in geographically distributed VPN installations where each location could have its own certificate server handling the network beneath it.
Hardware
Cisco IOS Packaging
SDP Phase 4: Hierarchical Certificate Servers is positioned in the Advanced Security packages across Cisco routers ( Figure 3).
Cisco IOS Packaging Contact: Fariba Farniam ( ffarniam@cisco.com)
Product Management Contact: Jai Balasubramaniyan ( ask-stg-ios-pm@cisco.com)
2.1.10) OS Universal Serial Bus Token Support: Public Key Infrastructure Enhancements
The Cisco IOS Software Universal Serial Bus (USB) Token Support project provides support for USB cryptographic tokens and flash drives on Cisco IOS Software. The USB token plugs into the router's USB port.
Tokens provide a secure place to store keys and configurations, where they can be protected with a PIN. Tokens do not have enough storage to hold images or other bulk data. The tokens supported in this release have a capacity of 32 KB, of which about half is taken up by token and Cisco IOS Software system overhead. This size is suitable for a small configuration and a few certificates and keys.
Flash drives can be used to store images, configurations, and other data, but are not suitable for private keys because they have no security.
Figure 6
USB Token: PKI
Benefits
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Simplifies secure initial deployment. Router can be drop-shipped by distributor, while the token containing configuration and private keys is distributed by other means.
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Simplifies replacement of failed routers. The user just needs to remove the spare from the closet or have it drop-shipped and plug in the token from the failed router, and it should work. This method assumes that the token contains the configuration and keys.
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Helps in securing a VPN connection. The router may have access to the Internet at all times, but it can only use the VPN when the token is present, because the keys on the token are used to set up the tunnel, and the tunnel is torn down when the token is removed.
Hardware
Cisco IOS Packaging
OS USB Token Support: PKI Enhancements is positioned in the Advanced Security packages across Cisco routers ( Figure 3).
Cisco IOS Packaging Contact: Fariba Farniam ( ffarniam@cisco.com)
Product Management Contact: Jai Balasubramaniyan ( ask-stg-ios-pm@cisco.com)
2.1.11) Persistent Self-Signed Certificates
Cisco IOS Software has an HTTPS server that allows access to Web-based management pages using a SSL connection. SSL requires the server to present its certificate to the client during the SSL handshake prior to establishing a secure connection between the server and the client.
If the Cisco IOS Software does not have a certificate that the HTTPS server can use, it generates a self-signed certificate by calling the PKI API. This API is then presented to the client, which prompts the user to accept the certificate. If the user accepts, the certificate is stored in the browser for future use.
Future SSL handshakes require the same certificate. However, on reloads, this certificate is lost, and a new one has to be generated and go through the same authentication sequence. The Persistent Self-Signed Certificate feature overcomes these limitations by saving a certificate in the router's startup configuration and having persistence using HTTPS connections with clients.
Figure 7
Persistent Self-Signed Certificates
Benefits
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Ease of use: a persistent self-signed certificate stored in the router's startup configuration eliminates need for manual user intervention to accept a certificate every time the router reloads.
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Improved performance: as user intervention is no longer necessary to accept the certificate, the secure connection process is faster.
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Better security: having a persistent self-signed certificate stored in the router's startup configuration (NVRAM) lessens the opportunity for an attacker to substitute an unauthorized certificate.
Hardware
Cisco IOS Packaging
Persistent Self Signed Certificates is positioned in the Advanced Security packages across Cisco routers ( Figure 3).
Cisco IOS Packaging Contact: Fariba Farniam ( ffarniam@cisco.com)
Product Management Contact: Jai Balasubramaniyan ( ask-stg-ios-pm@cisco.com)
2.1.12) Easy VPN Remote Phase 4.1: Enhancements
Easy VPN Phase 4.1 supports two enhancements for Easy VPN Remote: Support for Reliable Static Routing using Object Tracking and Tunnel Activation on Interesting Traffic on Easy VPN Remote.
Support for Reliable Static Routing using Object Tracking is a current feature the enables Cisco IOS Software to identify when a Point-to-Point Protocol over Ethernet (PPPoE) or IPsec VPN tunnel goes down and initiate a dial-on-demand routing (DDR) connection to a preconfigured destination from any alternative WAN/LAN port (for example, T1, ISDN, analog, or AUX). This feature delivers a solution for deployments in which a remote router only has a static route to the corporate network. The IP Static route-tracking feature allows an object to be tracked (by IP address or host name) using ICMP, TCP, or other protocols and installs or removes the static route based on the state of the tracked object. If this feature determines that Internet connectivity is lost, then the default route for the primary interface is removed, and the floating static route for the backup interface is enabled.
This new enhancement delivers the capability to establish a secondary Easy VPN connection, if the primary Easy VPN connection fails, using support of Reliable Static Routing using Object Tracking. However, it is based on the dial backup interface only.
Two new Easy VPN Remote CLI configuration options support Reliable Static Routing using Object Tracking: a connection to the backup Easy VPN remote configuration and a connection to the tracking system.
backup < ezvpn-cfg-name> specifies the Easy VPN configuration that will be activated when backup is triggered. track <tracked-object-number> specifies the link to the tracking system so that the Easy VPN state machine can get the notification to trigger backup.
crypto ipsec client ezvpn <ezvpn-cfg-name>backup <ezvpn-cfg-name> track <tracked-object-number>Easy VPN Remote registers to the tracking system to get the notifications for change in the state of the object. The above command will inform the tracking process that Easy VPN Remote is interested in tracking an object, identified by the object number. The tracking process will in turn inform Easy VPN Remote when the state of this object changes. This notification prompts Easy VPN Remote to bring up the backup connection when the tracked object state is DOWN. When the tracked object is UP again, the backup connection is torn down, and Easy VPN Remote will switch back to using the primary connection. The primary connection is not torn down when the tracked object goes DOWN; however, it may timeout or reset eventually on its own. The pings will continue to be attempted to be sent using the primary tunnel. If the tunnel is not up, the pings will be dropped. The primary tunnel will continue to attempt to reestablish, and once it does, the pings will be successful, and the tracked object state will go UP again.
Benefits
•
Allows flexibility to track an object and initiate dial backup.
Tunnel Activation on Interesting Traffic on Easy VPN Remote is a feature that introduces a new method of activating Easy VPN tunnels based on user traffic. Prior to this feature there were two ways to bring up the tunnel: manual entry of the XAuth user/password, and automatic activation of the tunnel with the user/password stored in the configuration file. The new feature will only bring up the tunnel when user traffic needs to use it. It can be used with an idle timer on the tunnel to bring the tunnel up and down only when it is needed for user traffic. This arrangement can reduce the load on the Easy VPN concentrator, because tunnels are only brought up when needed.
Figure 8
Activation Triggered by Easy VPN Remote Traffic
Benefits
Reduces the load on the Easy VPN concentrator, because tunnels are only brought up when needed.
Hardware
Cisco IOS Packaging
Easy VPN Remote Phase 4.1: Enhancements is positioned in the Advanced Security packages across Cisco routers ( Figure 3).
Cisco IOS Packaging Contact: Fariba Farniam ( ffarniam@cisco.com)
Product Management Contact: Siva Natarajan ( ask-stg-ios-pm@cisco.com)
2.1.13) IPsec Preferred Peer
IPsec Preferred Peer allows a user to tag a peer as the default peer in a multiple-set peer configuration. The provisions include setting a peer with default option and setting an IPsec idle timer with default option.
Setting a peer with default option: a new keyword—default—has been added to mark the first peer in a multiple-set peer configuration as the default peer. This peer will then be retried in certain failure cases before a connection to the next peer on the list is attempted. If a failure is detected by dead peer detection (DPD), the default peer will be tried once more before the next peer is tried. If the default peer is unresponsive, failure using retransmits of Internet Key Exchange (IKE) initiation messages will set the new current peer to the next one on the list. Further connections through that crypto map will then try this new current peer.
This feature is useful in a dial backup scenario in which transmission stops because of remote peer failure traffic on a physical link. DPD will indicate that the remote peer is unavailable, although it will remain the current peer. The dial backup link will come up. Once connectivity through the physical link is restored, the default peer will be tried again. This procedure allows the user to always give preference to certain peers in the event of failover and is useful if the original failure occurred because of a connectivity problem through the network, as opposed to the remote peer itself failing. If the remote peer has indeed failed, retransmits to that peer (this process takes approximately 45 seconds) will force the default peer to be skipped and the next peer on the list to be tried.
Benefits
Allows flexibility to use a primary peer when it is better (for example, closer, less expensive, or provides more bandwidth).
Hardware
Additional Information
•
The set a peer with default option must be used in conjunction with DPD. It is most effective on a remote site running DPD in periodic mode. DPD will detect the failure of the other device quickly and reset the peer list to try the default peer again on the next attempt.
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Only one peer may be designated the default on a crypto map.
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The default peer must be the first peer in the list.
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Use with the crypto map set peer default feature.
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Idle timers with the default keyword are only available on a per-crypto-map basis. This command will not work with the global idle timer command.
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If a global idle timer is set, the crypto map idle timer value must be different from the global value; otherwise it will not be added to the crypto map.
Cisco IOS Packaging
The Cisco IOS IPsec Preferred Peer feature is positioned in the Advanced Security packages across Cisco routers ( Figure 3).
Cisco IOS Packaging Contact: Fariba Farniam ( ffarniam@cisco.com)
Product Management Contact: Siva Natarajan ( ask-stg-ios-pm@cisco.com)
2.1.14) IPsec Antireplay Window Expansion and Disable Options
IPsec antireplay window is a 32-bit counter and a bitmap (or equivalent) used to describe whether an inbound authentication header or ESP packet is a replay. The Expansion and Disable options supported in this feature give IPsec users two additional options with which to control the antireplay mechanism in IPsec. Users can now choose to expand the antireplay window size or, alternatively, disable antireplay checking completely. The default antireplay window size and default enabling of antireplay checking for IPsec in Cisco IOS Software will be the same as in prior Cisco IOS Software releases.
Figure 9
IPsec Antireplay
Benefits
Allows an IT administrator flexibility to control antireplay window size or disable it.
Hardware
Additional Information
If the antireplay window is disabled, replay attack is possible.
Cisco IOS Packaging
IPsec Antireplay Window Expansion and Disable Options is positioned in the Advanced Security packages across Cisco routers ( Figure 3).
Cisco IOS Packaging Contact: Fariba Farniam ( ffarniam@cisco.com)
Product Management Contact: Siva Natarajan ( ask-stg-ios-pm@cisco.com)
2.1.15) IPsec Virtual Tunnel Interface
VPNs are increasingly being recognized as a mainstream solution for secure WAN connectivity. They replace or augment existing private networks using leased lines, Frame Relay, or ATM to connect remote and branch offices and central sites more cost effectively and with increased flexibility. This new status requires that VPN devices deliver higher performance, support for both LAN and WAN interfaces, and high network availability. IPsec virtual tunnel interfaces (VTIs) are a new tool that can be used by customers to configure IPsec-based VPNs between site-to-site devices. IPsec VTI tunnels provide a designated pathway across the shared WAN and encapsulate traffic with new packet headers, ensuring delivery to specific destinations. The network is private because traffic can enter a tunnel only at an endpoint. In addition, IPsec provides true confidentiality (as does encryption) and can carry encrypted traffic.
With IPsec VTIs delivered by Cisco, enterprises can use cost-effective VPNs and continue to add voice and video to their data networks without compromising quality and reliability.
Cisco IPsec VTIs provide secure connectivity for site-to-site VPNs combined with the Cisco Architecture for Voice, Video and Integrated Data (AVVID) architecture for delivering converged voice, video, and data over IP networks. VPNs deliver cost-effective, flexible wide-area connectivity, while providing a network infrastructure that supports the latest converged network applications such as IP telephony and video.
Figure 10
IPsec Static Virtual Tunnel Interfaces Between Two Sites
Benefits
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Simplified management—Customers can use Cisco IOS Software virtual tunnel constructs to configure an IPsec VTI, thus simplifying VPN configuration complexity, which translates into reduced costs as the need for local IT support is minimized. In addition, existing management applications that can monitor interfaces can be used for monitoring purposes.
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Support for multicast encryption—Customers can use Cisco IOS Software IPsec VTIs to transfer the multicast traffic, control traffic, or data traffic-for example, many voice and video applications,-from one site to another securely.
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Routable interface—Cisco IOS Software IPsec VTIs can support all types of IP routing protocols. Customers can use these capabilities of VTI to connect larger office environments, such as branch offices, complete with a PBX extension.
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Improved scaling—IPsec virtual interfaces need fewer security associations to be established to cover different types of traffic, both unicast and multicast, thus enabling improved scaling.
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Flexibility of defining features—An IPsec virtual interface is an encapsulation within its own interface. This arrangement offers flexibility of defining features to run on either the physical or the IPsec interface.
Hardware
Cisco IOS Packaging
The Cisco IOS IPsec Virtual Tunnel Interface feature is positioned in the Advanced Security packages across Cisco routers ( Figure 3).
Cisco IOS Packaging Contact: Fariba Farniam ( ffarniam@cisco.com)
Product Management Contact: Siva Natarajan ( ask-stg-ios-pm@cisco.com)
2.1.16) Reverse Route Injection
Reverse Route Injection (RRI) is used to create static routes based on remote proxy IDs (subnet/mask) for remote IPsec devices. It is platform independent (except for Cisco Catalyst 6000 Series and Cisco 7600 Series Router) and is dynamic in that it saves the user from statically defining routes. It is remote agnostic as well and works on both dynamic and static crypto maps. Typically in an RRI, routes are injected into the routing process.
RRI enhancements included in this release: Cisco IOS Software can now alter RRI behavior for static L2L. IPsec tunnels and can retain RRI routes when a crypto ACL is modified. In addition, it is enhanced to retain RRI routes for dynamic customer premises equipment CPE as well as remove RRI routes when same crypto map is applied to two different interfaces.
Figure 11
Reverse Route Injection
Benefits
Saves the user from statically defining routes.
Considerations
Cisco IOS Software will not allow RRI in the same crypto map on multiple interfaces.
Hardware
Additional Information
If the antireplay window is disabled, replay attack is possible.
Cisco IOS Packaging
Reverse Route Injection is positioned in the Advanced Security packages across Cisco routers ( Figure 3).
Cisco IOS Packaging Contact: Fariba Farniam ( ffarniam@cisco.com)
Product Management Contact: Siva Natarajan ( ask-stg-ios-pm@cisco.com)
2.1.17) Easy VPN Remote Web-Based Activation
Easy VPN contains two primary hardware client applications: Teleworker and Branch Office. Teleworker allows user-driven authentication of the client router (for example, interactive XAuth credential entry) with optional authentication of devices behind the client router. Teleworker is also possibly useful for offices in which one person is authorized to activate the office connection. The second application is Branch Office, where a client router connects automatically without user intervention (XAuth credentials saved in configuration file). Optionally, it is possible to authenticate devices behind the client router.
Easy VPN Remote Web-Based Activation allows the authentication of the remote router more easily by having a Web-based interface in which to enter xAuth username/password.
Figure 12
Easy VPN Remote Web-Based Activation
Benefits
Small office or home office (SOHO) users benefit greatly by using a Web-based interface to activate Easy VPN Remote.
Hardware
Additional Information
If the antireplay window is disabled, replay attack is possible.
Cisco IOS Packaging
Easy VPN Remote Web-Based Activation is positioned in the Advanced Security packages across Cisco routers ( Figure 3).
Cisco IOS Packaging Contact: Fariba Farniam ( ffarniam@cisco.com)
Product Management Contact: Siva Natarajan ( ask-stg-ios-pm@cisco.com)
2.1.18) WebVPN
WebVPN is an SSL-based VPN solution that provides clientless remote access by using a Web browser as the remote user's VPN client. Because most personal computers already have a Web browser installed, no further application installation is required to securely access network resources. This feature can augment the existing IPsec remote access (Easy VPN) functionality or, in environments with relatively simple remote access requirements, WebVPN may offer sufficient functionality to address all remote access demands. Cisco IOS Software WebVPN makes it easy to deploy remote access to internal applications on a single integrated network device.
The first release of WebVPN in Cisco IOS Software supports two functional modes:
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The first mode (clientless) provides secure access to private Web resources and will provide access to Web content. This mode is useful for accessing most content that you would expect to use within a Web browser, such as Web browsing, databases, or online tools that employ a Web interface.
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The second functional mode (thin client) extends the capability of the cryptographic functions of the Web browser to enable remote access for email applications using POP3, SMTP, and IMAP.
Benefits
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Uses a standard Web browser to access the corporate network and does not require a client to be installed on the client machine.
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SSL encryption native to browser provides transport security.
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Has granular access control.
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Additional client and server applications are accessed using a Java applet.
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Allows access from noncorporate machines such as airport kiosks.
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Allows easy firewall and network traversal from any location.
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Allows transparent wireless roaming.
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Integrated Cisco IOS Firewall provides enhanced security.
Hardware
Considerations
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If WebVPN needs to be enabled on the router that is running HTTP Secure Server, the administrator must configure an IP address for WebVPN using the gateway-addr keyword option of the webvpn enable command.
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The browsing of URLs that are referred by Macromedia Flash is not modified for secure retrieval by the WebVPN gateway.
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This feature in Cisco IOS Software Release 12.3(14)T supports SSL Version 3. Transport Layer Security (TLS) is not supported.
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Thin client used for TCP port-forwarding applications requires administrative privileges on the computer of the end user.
Cisco IOS Packaging
WebVPN is positioned in the Advanced Security packages across Cisco routers ( Figure 3).
Cisco IOS Packaging Contact: Fariba Farniam ( ffarniam@cisco.com)
Product Management Contact: Gary Sockrider ( ask-stg-ios-pm@cisco.com)
2.1.19) Cisco Router and Security Device Manager 2.1
Cisco Router and Security Device Manager (SDM) 2.1 combines routing and security services management with ease of use, intelligent wizards, and in-depth troubleshooting capabilities to provide a tool that supports the benefits of integrating services onto the router. Customers can now synchronize routing and security policies throughout the network, enjoy a more comprehensive view of their router services status, and reduce their operational costs.
Benefits
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New hardware support
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Cisco Small Business 100 Series
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Cisco VPN Acceleration Module 2+ (VAM2+)
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High-speed WAN interface card 4T (HWIC-4T), HWIC-4A/S, HWIC-8A/S, HWIC-8A, and HWIC-16A
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Provides ability to recognize, configure, and monitor the new hardware
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Localized in six languages
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Cisco SDM user interface and online help translated into Japanese, simplified Chinese, French, German, Spanish, and Italian (available in May 2005)
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Microsoft Windows OS support for these languages (available now)
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Simplifies router management for native language users
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Cisco SDM Express
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Wizard-based deployment of router
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Offers quick and easy router deployment for basic WAN access configurations
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Ideal router deployment tool for nonexpert users
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PC-based SDM
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Cisco SDM installed on Windows-based PC instead of router flash memory
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No extra flash memory space required on router for SDM
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Great tool to manage the installed base of Cisco routers
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PPP over ATM (PPPoA)
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Offers quick and easy deployment of xDSL router interfaces for PPPoA configurations
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