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3-6

Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide

OL-6392-01

Chapter 3 Connecting to the Firewall Services Module and Managing the Configuration

Managing the Configuration at the CLI

Table of Contents

Default Chapter4
- Table of Contents4
Document Objectives17
- About this Guide17
Chapter 2 Configuring the Switch for the Firewall Services Module18
Related Documentation18
Document Organization18
Document Conventions19
Obtaining Documentation19
- Ordering Documentation20
Documentation Feedback20
Obtaining Technical Assistance20
Obtaining Additional Publications and Information22
- Vlan Interfaces34
- Switch Overview39
- Assigning Vlans to the Firewall Services Module40
- Verifying the Module Installation40
- Adding Switched Virtual Interfaces to the MSFC43
- Configuring the Switch for Failover49
- Customizing the FWSM Internal Interface49
- Managing the Firewall Services Module Boot Partitions50
Chapter 3 Connecting to the Firewall Services Module and Managing the Configuration53
- Sessioning and Logging into the Firewall Services Module53
- Managing the Configuration at the CLI55
- Firewall Mode Overview59
  - Routed Mode Overview59
    - Network Address Translation60
Chapter 4 Configuring the Firewall Mode60
- How Data Moves through the FWSM in Routed Firewall Mode61
- Transparent Mode Overview66
- Setting the Firewall Mode74
- Security Context Overview75
Chapter 5 Managing Security Context76
- IP Routing Support79
- Sharing Resources and Interfaces between Contexts79
  - Sharing Resources80
  - Shared Interface Limitations81
- Logging into the FWSM in Multiple Context Mode83
- Enabling or Disabling Multiple Context Mode84
- Configuring Resource Management85
- Configuring a Security Context93
- Removing a Security Context96
- Changing the Admin Context96
- Changing between Contexts and the System Execution Space96
- Changing the Security Context URL97
- Reloading a Security Context98
  - Reloading by Clearing the Configuration98
  - Reloading by Removing and Re-Adding the Context98
- Monitoring Security Contexts98
- Changing the Passwords107
Chapter 6 Configuring Basic Setting109
- Setting the Host Name110
Setting the Host Name111
Setting the Domain Name111
Adding a Login Banner111
Configuring Interfaces112
- Security Level Overview112
- Setting the Name and Security Level113
- Allowing Communication between Interfaces on the same Security Level114
- Turning off and Turning on Interfaces116
Configuring Connection Limits for Non-NAT Configurations116
CHAPTER 7 Configuring Bridging Parameters and ARP Inspection119
- Customizing the MAC Address Table119
- Configuring ARP Inspection121
CHAPTER 8 Configuring IP Addresses, Routing, and DHCP123
- Configuring IP Addresses123
  - Assigning IP Addresses to Interfaces for a Routed Firewall124
  - Setting the Management IP Address for a Transparent Firewall124
- Configuring the Default Route124
- C H a P T E R 8 Configuring IP Addresses, Routing, and DHCP124
- Configuring Static Routes125
- Configuring OSPF126
- Configuring RIP140
  - RIP Overview140
  - Enabling RIP140
- Configuring the DHCP Server141
  - Enabling the DHCP Server141
  - Using Cisco IP Phones with a DHCP Server142
- Configuring DHCP Relay143
- NAT Overview145
CHAPTER 9 Configuring Network Address Translation146
- NAT Overview146
- Using Dynamic NAT and PAT160
  - Dynamic NAT and PAT Implementation161
  - Configuring NAT or PAT167
- Using Static NAT170
- Using Static PAT171
- Bypassing NAT173
- NAT Examples176
  - Overlapping Networks177
  - Redirecting Ports178
CHAPTER 10 Controlling Network Access with Access Control Lists181
- Access Control List Overview181
  - Access Control List Types and Uses182
  - Access Control List Guidelines186
- Adding an Extended Access Control List193
- Adding an Ethertype Access Control List196
- Adding a Standard Access Control List197
- Simplifying Access Control Lists with Object Grouping198
- Manually Committing Access Control Lists and Rules204
- Adding Remarks to Access Control Lists205
- Logging Extended Access Control List Activity206
- Allowing Remote Management209
- Allowing Telnet209
- Allowing SSH210
Chapter 11 Allowing Remote Management210
- Configuring SSH Access211
- Using an SSH Client212
- Allowing HTTPS for PDM212
- Allowing a VPN Management Connection213
- Allowing ICMP to and from the FWSM218
- Configuring AAA221
- AAA Overview221
Chapter 12 Configuring AAA222
- About Accounting223
- AAA Server and Local Database Support224
- Configuring the Local Database226
- Identifying a AAA Server226
- Configuring Authentication for CLI Access228
- Configuring Authentication to Access Privileged Mode228
  - Configuring Authentication for the Enable Command229
  - Authenticating Users Using the Login Command229
- Configuring Command Authorization230
- Viewing the Current Logged-In User238
- Recovering from a Lockout239
- Configuring Authentication for Network Access240
- Configuring Authorization for Network Access243
  - Configuring TACACS+ Authorization244
  - Configuring RADIUS Authorization245
    - Configuring the RADIUS Server to Download Per-User Access Control Lists245
    - Configuring the RADIUS Server to Download Per-User Access Control List Names247
- Configuring Accounting for Network Access247
Chapter 13 Configuring Application Protocol Inspection249
- Inspection Engine Overview249
- Configuring an Inspection Engine252
- Detailed Information about Inspection Engines253
CHAPTER 14 Filtering HTTP, HTTPS, or FTP Requests Using an External Server271
- Filtering Overview271
- Configuring General Filtering Parameters272
- Filtering HTTP Urls275
- Filtering HTTPS Urls276
- Filtering FTP Requests276
- Viewing Filtering Statistics276
- Using Failover279
- Understanding Failover279
  - Failover Overview280
  - Regular and Stateful Failover280
Chapter 15 Using Failover280
- Failover and State Links281
  - Failover Link281
  - State Link281
- Module Placement282
  - Intra-Chassis Failover282
  - Inter-Chassis Failover282
- Transparent Firewall Requirements287
- Primary/Secondary Status and Active/Standby Status288
- Configuration Replication288
- Disabling Configuration Synchronization290
- Failover Triggers290
- Failover Actions290
- Failover Monitoring291
  - Module Health Monitoring291
  - Interface Monitoring292
- Configuring Failover293
  - Configuring the Primary Module293
  - Configuring the Secondary Module296
- Verifying the Failover Configuration297
- Forcing Failover301
- Disabling Failover301
- Monitoring Failover301
  - Failover System Messages302
- Snmp302
Chapter 16 Managing Software and Configuration Files307
- Installing Application or PDM Software307
- Installing Maintenance Software311
- Downloading and Backing up Configuration Files311
  - Downloading a Text Configuration312
  - Backing up the Configuration313
    - Copying the Configuration to a Server313
    - Copying the Configuration from the Terminal Display314
Chapter 17 Monitoring and Troubleshooting the Firewall Services Module315
- Monitoring the Firewall Services Module315
  - Using System Messages315
  - Using SNMP315
    - SNMP Overview316
    - Enabling SNMP317
- Troubleshooting the Firewall Services Module318
Appendix329
A Specifications329
- Physical Attributes329
- Feature Limits330
Appendix A Specification330
- Managed System Resources331
- Fixed System Resources332
- Rule Limits333
Appendix335
- Sample Configurations335
  - Routed Mode Examples335
Appendix B Sample Configuration336
- Example 1: Admin Context Configuration337
- Example 1: Customer a Context Configuration338
- Example 1: Customer B Context Configuration338
- Example 1: Customer C Context Configuration338
- Example 1: Switch Configuration339
- Transparent Mode Examples349
  - Example 5: Security Contexts with Outside Access349
  - Example 6: Failover352
Appendix357
Understanding the Command-Line Interface357
- Command Prompts357
- Syntax Formatting358
- Abbreviating Commands358
- Command Line Editing359
- Filtering Show Command Output359
- Command Output Paging360
- Adding Comments360
- Text Configuration Files360
- Command Help362
Appendix363
Addresses, Protocols, and Ports Reference363
- IP Addresses and Subnet Masks363
- Protocols and Applications367
- TCP and UDP Ports368
- ICMP Types371

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