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Cisco Content Services Switch 
Security Configuration Guide
Software Version 7.50
March 2005
Corporate Headquarters
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
http://www.cisco.com
Tel: 408 526-4000
800 553-NETS (6387)
Fax: 408 526-4100
Text Part Number: OL-5650-02                                                                                                                                                                                                               
                    
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                          THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT  NOTICE. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT  ARE PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR  THEIR APPLICATION OF ANY PRODUCTS. THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE  INFORMATION PACKET THAT SHIPPED WITH THE PRODUCT AND ARE
                    
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                          CONTENTS Preface xi Audience xii How to Use This Guide xii Related Documentation xiii Symbols and Conventions xvi Obtaining Documentation xvii Cisco.com xvii Documentation DVD xviii Ordering Documentation xviii Documentation Feedback xviii Cisco Product Security Overview xix Reporting Security Problems in Cisco Products xix Obtaining Technical Assistance xx Cisco Technical Support Website xx Submitting a Service Request xxi Definitions of Service Request Severity xxii Obtaining Additional Publ
                    
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                        Contents   Controlling Administrative Access to the CSS 1-10 Enabling Administrative Access to the CSS 1-10 Disabling Administrative Access to the CSS 1-11 Controlling CSS Network Traffic Through Access Control Lists 1-12 ACL Overview 1-13 ACL Configuration Quick Start 1-15 Creating an ACL 1-17 Deleting an ACL 1-18 Configuring Clauses 1-19 Adding a Clause When ACLs are Globally Enabled 1-25 Deleting a Clause 1-26 Applying an ACL to a Circuit or DNS Queries 1-27 Removing an ACL from Circuits or D
                    
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                        Contents   Configuring SSHD in the CSS 2-3 Configuring SSHD Keepalive 2-3 Configuring SSHD Port 2-4 Configuring SSHD Server-Keybits 2-4 Configuring SSHD Version 2-5 Configuring Telnet Access When Using SSHD 2-6 Showing SSHD Configurations 2-6 CHAPTER 3 Configuring the CSS as a Client of a RADIUS Server 3-1 RADIUS Configuration Quick Start 3-3 Configuring a RADIUS Server for Use with the CSS 3-4 Configuring Authentication Settings 3-5 Configuring Authorization Settings 3-5 Specifying a Primary RA
                    
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                        Contents   Setting the Global TACACS+ Keepalive Frequency 4-7 Defining a TACACS+ Server 4-8 Setting TACACS+ Authorization 4-11 Sending Full CSS Commands to the TACACS+ Server 4-12 Setting TACACS+ Accounting 4-13 Showing TACACS+ Server Configuration Information 4-14 CHAPTER 5 Configuring Firewall Load Balancing 5-1 Overview of FWLB 5-2 Firewall Synchronization 5-3 Configuring FWLB 5-3 Configuring a Keepalive Timeout for a Firewall 5-4 Configuring an IP Static Route for a Firewall 5-5 Configuring 
                    
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                          FI G U R E S Figure 1-1 CSS Directory Access Privileges 1-5 Figure 1-2 ACLs Enabled on the CSS 1-14 Figure 5-1 Example of FWLB 5-9 Figure 5-2 FWLB with VIP/Interface Redundancy Configuration 5-11 Cisco Content Services Switch Security Configuration Guide OL-5650-02 vii                                                                                                                                                                                                                                     
                    
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                        Figures   Cisco Content Services Switch Security Configuration Guide OL-5650-02 viii                                                                                                                                                                                                                                                                                                                                                                                                                                
                    
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                          TABLES Table 1-1 ACL Configuration Quick Start 1-16 Table 1-2 Clause Command Options 1-21 Table 1-3 Field Descriptions for the show acl Command Output 1-31 Table 1-4 Field Descriptions for the show nql Command Output 1-38 Table 2-1 Field Descriptions for the show sshd config Command 2-6 Table 2-2 Field Descriptions for the show sshd sessions Command 2-8 Table 3-1 RADIUS Configuration Quick Start 3-3 Table 3-2 Field Descriptions for the show radius config Command 3-10 Table 3-3 Field Descriptio
                    
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                        Tables   Cisco Content Services Switch Security Configuration Guide OL-5650-02 x                                                                                                                                                                                                                                                                                                                                                                                                                                    
                    
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                          Preface This guide provides instructions for configuring the security features of the Cisco  11500 Series Content Services Switches (CSS). Information in this guide applies  to all CSS models except where noted. The CSS software is available in a Standard or optional Enhanced feature set.  Proximity Database and Secure Management, which includes Secure Shell Host  and SSL strong encryption for the Device Management software, are optional  features. This preface contains the following major sec
                    
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                        Preface Audience   Audience This guide is intended for the following trained and qualified service personnel  who are responsible for configuring the CSS:  Web master  System administrator  System operator How to Use This Guide This guide is organized as follows: Chapter Description Chapter 1, Control access to the CSS including user  Controlling CSS Access and network traffic access. Chapter 2, Configure Secure Shell Daemon (SSHD)  Configuring the Secure Shell protocol to provide secure encr
                    
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                        Preface Related Documentation   Related Documentation In addition to this guide, the Content Services Switch documentation includes the  following publications. Document Title Description Release Note for the This release note provides information on  Cisco 11500 Series operating considerations, caveats, and command  Content Services Switch line interface (CLI) commands for the Cisco 11500  series CSS. Cisco 11500 Series This guide provides information for installing,  Content Services Switch ca
                    
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                        Preface Related Documentation   Document Title Description Cisco Content Services This guide describes how to perform administrative  Switch Administration tasks on the CSS, including upgrading your CSS  Guide software and configuring the following:  Logging, including displaying log messages  and interpreting sys.log messages   User profile and CSS parameters   SNMP   RMON  XML documents to configure the CSS  CSS scripting language  Offline Diagnostic Monitor (Offline DM)  menu Cisco Con
                    
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                        Preface Related Documentation   Document Title Description Cisco Content Services This guide describes how to perform CSS content  Switch Content load-balancing configuration tasks, including: Load-Balancing   Flow and port mapping Configuration Guide  Services  Service, global, and script keepalives  Source groups  Loads for services  Server/Application State Protocol (SASP)   Dynamic Feedback Protocol (DFP)   Owners  Content rules   Sticky parameters  HTTP header load balancing  Co
                    
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                        Preface Symbols and Conventions   Document Title Description Cisco Content Services This guide describes how to perform CSS SSL  Switch SSL Configuration configuration tasks, including: Guide  SSL certificate and keys  SSL termination  Back-end SSL  SSL initiation Cisco Content Services This reference provides an alphabetical list of all  Switch Command CLI commands including syntax, options, and  Reference related commands. Cisco Content Services This guide describes how to use the Device  
                    
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                        Preface Obtaining Documentation   Courier text indicates text that appears on a command line, including the CLI  prompt. Courier bold text indicates commands and text you enter in a command line. Italics text indicates the first occurrence of a new term, book title, emphasized  text, and variables for which you supply values. 1. A numbered list indicates that the order of the list items is important. a. An alphabetical list indicates that the order of the secondary list items is  important.  A 
                    
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                        Preface Documentation Feedback   Documentation DVD Cisco documentation and additional literature are available in a Documentation  DVD package, which may have shipped with your product. The Documentation  DVD is updated regularly and may be more current than printed documentation.  The Documentation DVD package is available as a single unit.  Registered Cisco.com users (Cisco direct customers) can order a Cisco  Documentation DVD (product number DOC-DOCDVD=) from the Ordering tool  or Cisco Mark
                    
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                        Preface Cisco Product Security Overview   You can submit comments by using the response card (if present) behind the front  cover of your document or by writing to the following address: Cisco Systems Attn: Customer Document Ordering 170 West Tasman Drive San Jose, CA 95134-9883 We appreciate your comments. Cisco Product Security Overview Cisco provides a free online Security Vulnerability Policy portal at this URL: http://www.cisco.com/en/US/products/products_security_vulnerability_policy.ht ml
                    
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                        Preface Obtaining Technical Assistance    Nonemergencies—psirt@cisco.com Tip We encourage you to use Pretty Good Privacy (PGP) or a compatible product to  encrypt any sensitive information that you send to Cisco. PSIRT can work from  encrypted information that is compatible with PGP versions 2.x through 8.x.  Never use a revoked or an expired encryption key. The correct public key to use  in your correspondence with PSIRT is the one that has the most recent creation  date in this public key ser