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RUCKUS FastIron Security Configuration Guide, 08.0.95

Provides step-by-step instructions to help you understand and configure security technology features for the current release of FastIron OS. Organized by technology, for example, Policy-Based Routing (PBR), and Flexible Authentication.

1 Vistance Legal Statements
Preface Ruckus
- 3 Contact Information, Resources, and Conventions
  - 3.1 Contacting RUCKUS Customer Services and Support
  - 3.2 Document Feedback
  - 3.3 RUCKUS Product Documentation Resources
  - 3.4 Online Training Resources
  - 3.5 Document Conventions
  - 3.6 Command Syntax Conventions
About This Document
- 4 About This Document
- 5 Managing User Accounts
  - 5.1 User Accounts Overview
    - 5.1.1 Configuration Enhancements for Local User Accounts
  - 5.2 Configuring Local User Accounts
  - 5.3 Recovering from a Lost Password
  - 5.4 Enabling Device Access Methods
  - 5.5 Remote Access For Managing Devices
    - 5.5.1 Remote Access Configuration Using Telnet
      - 5.5.1.1 Configuring Telnet Remote Access
    - 5.5.2 Remote Access Configuration Using SSH
    - 5.5.3 Using an IP Address to Restrict Remote Access
    - 5.5.4 Using an IP or MAC Address to Restrict Remote Access
    - 5.5.5 ACL Usage to Restrict Remote Access
      - 5.5.5.1 Using an ACL to Restrict Remote Access to Telnet
      - 5.5.5.2 Configuration Examples of Restricting Remote Access Using ACLs
    - 5.5.6 Restricting Remote Access to the Device to Specific VLAN IDs
      - 5.5.6.1 Using a Specific VLAN to Restrict Remote Access
    - 5.5.7 Designated VLAN for Management Sessions to a Layer 2 Switch
    - 5.5.8 Disabling Remote Access Methods
6 TACACS+ Server Authentication
- 6.1 TACACS and TACACS+ Security
  - 6.1.1 How TACACS+ Differs from TACACS
- 6.2 TACACS/TACACS+ Authentication, Authorization, and Accounting
  - 6.2.1 Comparing TACACS Authentication to TACACS+ Authentication
    - 6.2.1.1 TACACS+ Authorization
    - 6.2.1.2 TACACS+ Accounting
  - 6.2.2 AAA Operations for TACACS/TACACS+
    - 6.2.2.1 AAA Security for Commands Pasted into the running-config
- 6.3 TACACS and TACACS+ Configuration
  - 6.3.1 TACACS/TACACS+ Configuration Considerations
  - 6.3.2 Identifying the TACACS/TACACS+ Servers
  - 6.3.3 Specifying Different Servers for Individual AAA Functions
  - 6.3.4 Setting Optional TACACS and TACACS+ Parameters
    - 6.3.4.1 Setting the TACACS+ Key
    - 6.3.4.2 Setting the Retransmission Limit
    - 6.3.4.3 Setting the Timeout Parameter
    - 6.3.4.4 Enabling Management Access Based on a Port-based VLAN
  - 6.3.5 Configuring Authentication-method Lists for TACACS and TACACS+
  - 6.3.6 Configuring TACACS+ Authorization
    - 6.3.6.1 Configuring Exec Authorization
    - 6.3.6.2 Configuring Command Authorization
  - 6.3.7 TACACS+ Accounting Configuration
    - 6.3.7.1 Configuring TACACS+ Accounting for Telnet/SSH (Shell) Access
    - 6.3.7.2 Configuring TACACS+ Accounting for CLI Commands
    - 6.3.7.3 Configuring TACACS+ Accounting for System Events
  - 6.3.8 Configuring an Interface as the Source for All TACACS and TACACS+ Packets
  - 6.3.9 Configuring TACACS/TACACS+ for Devices in a Traditional Stack
  - 6.3.10 TACACS Configuration Example
  - 6.3.11 TACACS+ Configuration Example
- 6.4 Displaying TACACS/TACACS+ Statistics and Configuration Information
7 RADIUS Authentication
- 7.1 RADIUS Security
  - 7.1.1 RADIUS Authentication
  - 7.1.2 RADIUS Authorization
  - 7.1.3 RADIUS Accounting
  - 7.1.4 AAA Operations for RADIUS
  - 7.1.5 AAA Security for Commands Pasted into the running-config
- 7.2 RADIUS Configuration Considerations
- 7.3 Configuring RADIUS (Overview)
- 7.4 Configuring Company-Specific Attributes on the RADIUS Server
- 7.5 Identifying the RADIUS Server to the Ruckus Device
- 7.6 Specifying Different Servers for Individual AAA Functions
- 7.7 Mapping RADIUS Servers to Ports
- 7.8 RADIUS Configuration Example
- 7.9 Setting Up RADIUS over IPv6
- 7.10 Setting RADIUS Parameters
- 7.11 Configuring Detection of Dead RADIUS Servers
- 7.12 Source Address Configuration for RADIUS Packets
- 7.13 Configuring Authentication-method Lists for RADIUS
- 7.14 RADIUS Authorization
  - 7.14.1 Configuring Exec Authorization
  - 7.14.2 Configuring Command Authorization
  - 7.14.3 Command Authorization and Accounting for Console Commands
  - 7.14.4 Enabling RADIUS CoA and Disconnect Message Handling for Dynamic Authorization
    - 7.14.4.1 RADIUS Disconnect Message and CoA Events
    - 7.14.4.2 Supported IETF Attributes in RFC 5176
- 7.15 RADIUS Accounting
- 7.16 Displaying RADIUS Configuration Information
8 Security Vulnerability
- 8.1 SSL Security
  - 8.1.1 Enabling the SSL Server on the Device
  - 8.1.2 Specifying a Port for SSL Communication
  - 8.1.3 Changing the SSL Server Certificate Key Size
  - 8.1.4 Support for SSL Digital Certificates Larger than 2048 Bits
  - 8.1.5 Importing Digital Certificates and RSA Private Key Files
  - 8.1.6 Generating an SSL Certificate
  - 8.1.7 Deleting the SSL Certificate
- 8.2 TLS Support
- 8.3 Authentication-method Lists
  - 8.3.1 Configuration Considerations for Authentication-method Lists
  - 8.3.2 Examples of Authentication-method Lists
9 Secure Shell (SSH)
- 9.1 SSH Version 2 Overview
  - 9.1.1 Tested SSH2 Clients
  - 9.1.2 SSH2 Supported Features
  - 9.1.3 SSH2 Unsupported Features
  - 9.1.4 SSH2 Authentication Types
- 9.2 Configuring SSH2
  - 9.2.1 Enabling and Disabling SSH by Generating and Deleting Host Keys
    - 9.2.1.1 Generating a DSA or RSA Key Pair
    - 9.2.1.2 Deleting DSA and RSA Key Pairs
    - 9.2.1.3 Providing the Public Key to Clients
  - 9.2.2 Configuring DSA or RSA Challenge-Response Authentication
    - 9.2.2.1 Import Authorized Public Keys into the ICX Device
    - 9.2.2.2 Enable DSA or RSA Challenge-Response and Password Authentication
  - 9.2.3 Deleting the Public Keys
- 9.3 Optional Parameters Overview
  - 9.3.1 SSH Rekey Configuration Notes
  - 9.3.2 Set Optional Parameters
- 9.4 Filtering SSH Access Using ACLs
- 9.5 Terminating an Active SSH Connection
- 9.6 SSH2 Client
  - 9.6.1 Enabling SSH2 Client
  - 9.6.2 Configuring SSH2 Client Public Key Authentication
    - 9.6.2.1 Generating and Deleting a Client DSA Key Pair
    - 9.6.2.2 Generating and Deleting a Client RSA Key Pair
    - 9.6.2.3 Exporting Client Public Keys
  - 9.6.3 Establishing an SSH2 Client Connection
- 9.7 Displaying SSH Information
SCP client support
- 10 SCP Client Support
  - 10.1 SCP Client
  - 10.2 SCP Client Support Limitations
  - 10.3 Supported SCP Client Configurations
  - 10.4 Downloading an Image from an SCP Server
  - 10.5 Uploading an Image to an SCP Server
  - 10.6 Uploading Configuration Files to an SCP Server
  - 10.7 Downloading Configuration Files from an SCP Server
  - 10.8 Copying an Image between Devices
  - 10.9 Secure Copy with SSH2
    - 10.9.1 Enabling and Disabling SCP
    - 10.9.2 Secure copy configuration notes
    - 10.9.3 Example File Transfers Using SCP
      - 10.9.3.1 Copying a File to the running-config
      - 10.9.3.2 Copying a File to the startup config
      - 10.9.3.3 Copying the running-config File to an SCP-enabled Client
      - 10.9.3.4 Copying the startup config File to an SCP-enabled Client
      - 10.9.3.5 Copying a Software Image File to Flash Memory
      - 10.9.3.6 Copying a Software Image File from Flash Memory
      - 10.9.3.7 Importing a Digital Certificate Using SCP
      - 10.9.3.8 Importing an RSA Private Key
      - 10.9.3.9 Importing a DSA or RSA Public Key
      - 10.9.3.10 Copying License Files
11 ACLs
- 11.1 Layer 3 ACL Overview
  - 11.1.1 ACL Scaling
  - 11.1.2 Default ACL Action
  - 11.1.3 How Hardware-based ACLs Work
  - 11.1.4 How Fragmented Packets Are Processed
- 11.2 IPv4 ACLs
  - 11.2.1 IPv4 ACL Configuration Guidelines
  - 11.2.2 Creating and Applying a Standard IPv4 ACL
  - 11.2.3 IPv4 Extended ACL Traffic Filtering Criteria
  - 11.2.4 Creating and Applying an Extended IPv4 ACL
  - 11.2.5 Applying Egress ACLs to Control (CPU) Traffic
  - 11.2.6 Preserving User Input for ACL TCP/UDP Port Numbers
  - 11.2.7 Enabling Strict Control of ACL Filtering of Fragmented Packets
  - 11.2.8 Filtering on IP Precedence and ToS Values
  - 11.2.9 ACLs to Filter ARP Packets
    - 11.2.9.1 Configuration Considerations for Filtering ARP Packets
    - 11.2.9.2 Configuring ACLs for ARP Filtering
    - 11.2.9.3 Displaying ACL Filters for ARP
    - 11.2.9.4 Clearing the Filter Count
  - 11.2.10 QoS Options for IP ACLs
    - 11.2.10.1 Configuration Notes for QoS Options
    - 11.2.10.2 Using a Combined ACL for 802.1p Marking
    - 11.2.10.3 Configuring QoS Priority for a VLAN
    - 11.2.10.4 DSCP Matching
  - 11.2.11 ACL-based Rate Limiting
  - 11.2.12 ACLs to Control Multicast Features
  - 11.2.13 Displaying IPv4 ACL Information
- 11.3 IPv6 ACLs
  - 11.3.1 IPv6 ACL Traffic Filtering Criteria
  - 11.3.2 IPv6 Protocol Names and Numbers
  - 11.3.3 Default and Implicit IPv6 ACL Action
  - 11.3.4 IPv6 ACL Configuration Notes
  - 11.3.5 Creating and Applying an IPv6 ACL
  - 11.3.6 Neighbor Discovery (ND)-Packet DoS Attacks
  - 11.3.7 Displaying IPv6 ACLs
- 11.4 Applying an ACL to a LAG Interface
- 11.5 Applying ACLs to VLANs
- 11.6 ACL Logging
  - 11.6.1 Configuration Notes for ACL Logging
  - 11.6.2 Enabling ACL Logging
- 11.7 ACL Statistics
- 11.8 ACL Accounting
  - 11.8.1 Changing the Accounting Period
  - 11.8.2 Configuring ACL Accounting
- 11.9 Adding a Comment for an Entry in an ACL
  - 11.9.1 Deleting a Comment from an ACL Entry
  - 11.9.2 Viewing Comments in an ACL
- 11.10 Sequence-based ACL Editing
  - 11.10.1 Inserting Rules into ACLs
  - 11.10.2 Deleting Rules from ACLs
- 11.11 Displaying TCAM Information for ACLs
12 MAC ACLs
- 12.1 Layer 2 ACL Overview
- 12.2 MAC Scaling by ICX Device
- 12.3 MAC ACL Default Action
- 12.4 MAC ACL Configuration Notes and Limitations
- 12.5 Configuring and Applying MAC ACLs
- 12.6 Displaying MAC ACL Information
SS_Policy-Based Routing
- 13 Policy-Based Routing
MACsec Key-Based Security
- 14 Media Access Control Security
  - 14.1 MACsec Overview
  - 14.2 How MACsec Works
    - 14.2.1 MACsec Frame Format
  - 14.3 Configuring MACsec
  - 14.4 Enabling MACsec and Configuring Group Parameters
    - 14.4.1 Configuring MACsec Key-Server Priority
    - 14.4.2 Configuring MACsec Integrity and Encryption
    - 14.4.3 Configuring MACsec Frame Validation
    - 14.4.4 Configuring Replay Protection
  - 14.5 Enabling and Configuring Group Interfaces for MACsec
    - 14.5.1 Configuring the Pre-shared Key
  - 14.6 Sample MACsec Configuration
  - 14.7 Displaying MACsec Information
Port MAC Security
- 15 Port MAC Security (PMS)
  - 15.1 Port MAC Security Overview
    - 15.1.1 Local and Global Resources Used for Port MAC Security
    - 15.1.2 Configuration Considerations for Port MAC Security
    - 15.1.3 Secure MAC Movement
  - 15.2 Port MAC Security Configuration
  - 15.3 Configuring Port MAC Security
  - 15.4 Clearing Port Security Statistics
    - 15.4.1 Clearing Restricted MAC Addresses
    - 15.4.2 Clearing Violation Statistics
  - 15.5 Displaying Port MAC Security Information
16 Flexible Authentication
- 16.1 Flexible Authentication Overview
  - 16.1.1 MAC VLANs
  - 16.1.2 Data VLAN Requirements for Flexible Authentication
  - 16.1.3 Voice VLAN Requirements for Flexible Authentication
  - 16.1.4 Authentication Modes
  - 16.1.5 Tagged VM Client Support
  - 16.1.6 Static Authentication with MAC Authentication Filters
  - 16.1.7 Authentication Actions
    - 16.1.7.1 Authentication Timeout Action
  - 16.1.8 Authentication Session Limits on an Interface
  - 16.1.10 How Flexible Authentication Works
  - 16.1.11 Configuration Considerations and Guidelines for Flexible Authentication
- 16.2 802.1X Authentication
  - 16.2.1 Device Roles in an 802.1X Configuration
  - 16.2.2 Communication between the Devices
  - 16.2.3 Controlled and Uncontrolled Ports
  - 16.2.4 Port Control for Authentication
  - 16.2.5 Message Exchange During Authentication
    - 16.2.5.1 EAP Pass-Through Support
- 16.3 MAC Authentication
  - 16.3.1 MAC Address Formats Sent to the RADIUS Server
  - 16.3.2 Authenticating Multiple Hosts Connected to the Same Port
  - 16.3.3 How Flexible Authentication Works for Multiple Clients
  - 16.3.4 Flexible Authentication Accounting
  - 16.3.5 Change of Authorization
  - 16.3.6 Multiple RADIUS Servers
  - 16.3.8 Session Aging
  - 16.3.9 Periodic Reauthentication of Authenticated Clients
  - 16.3.10 Denial of Service Protection Support
  - 16.3.11 SNMP Traps for Flexible Authentication
  - 16.3.12 Syslog Messages for Flexible Authentication
- 16.4 RADIUS Attributes for Authentication and Accounting
- 16.5 Configuring ICX Vendor-Specific Attributes on the RADIUS Server
- 16.6 Support for the RADIUS User-name attribute in Access-Accept Messages
- 16.7 Dynamic VLAN Assignment
- 16.8 Dynamic ACLs in Authentication
  - 16.8.1 Configuration Guidelines for Dynamic ACLs
  - 16.8.2 Dynamically Applying Existing ACLs
- 16.9 Support for IP Source Guard Protection
- 16.10 Configuring Flexible Authentication
  - 16.10.1 Flexible Authentication Configuration Prerequisites
  - 16.10.2 Configuring Flexible Authentication Globally
  - 16.10.3 Configuring Flexible Authentication on an Interface
  - 16.10.4 Enabling 802.1X Authentication
  - 16.10.5 Enabling MAC Authentication
  - 16.10.6 Excluding the RADIUS Server for Login Features
- 16.11 Displaying Authentication Information
  - 16.11.1 Displaying Configuration
  - 16.11.2 Displaying Statistics
  - 16.11.3 Displaying the Authentication Sessions
  - 16.11.4 Displaying Information about User ACLs
  - 16.11.5 Displaying Dynamically Assigned VLAN Information
- 16.12 Clearing Authentication Details
17 IPsec
- 17.1 IPsec Overview
  - 17.1.1 Acronyms
  - 17.1.2 Establishment of an IPsec Tunnel
  - 17.1.3 Configuration of an IPsec Tunnel
  - 17.1.4 Configuration of Traffic to Route over an IPsec Tunnel
  - 17.1.5 Supported Algorithms
  - 17.1.6 Support for PSK for IKEv2 SAs
  - 17.1.7 Unicast IPv4 over IPsec Tunnels
  - 17.1.8 IPv6 over IPsec Tunnels
  - 17.1.9 IPsec Scalability Limits
  - 17.1.10 Supported Features and Functionality
  - 17.1.11 Unsupported Features
  - 17.1.12 Limitations
  - 17.1.13 IKEv2 Traps
  - 17.1.14 IPsec Traps
  - 17.1.15 IPSec over NAT
  - 17.1.16 Downgrade Considerations
- 17.2 Configuring Global Parameters for IKEv2
- 17.3 Configuring an IKEv2 Proposal
- 17.4 Configuring an IKEv2 Policy
- 17.5 Configuring an IKEv2 Authentication Proposal
- 17.6 Configuring an IKEv2 Profile
- 17.7 Configuring an IPsec Proposal
- 17.8 Configuring an IPsec Profile
- 17.9 Activating an IPsec Profile on a VTI
- 17.10 Routing Traffic over IPsec Using Static Routing
- 17.11 Routing Traffic over an IPsec Tunnel Using PBR
- 17.12 Re-establishing SAs
- 17.13 Enabling IKEv2 Extended Logging
- 17.14 Disabling Traps and Syslog Messages for IKEv2 and IPsec
- 17.15 Displaying IPsec Module Information
- 17.16 Displaying IKEv2 Configuration Information
- 17.17 Displaying IPsec Configuration Information
- 17.18 Displaying and Clearing Statistics for IKEv2 and IPsec
- 17.19 Configuration Example for an IPsec Tunnel Using Default Settings (Site-to-Site VPN)
- 17.20 Configuration Example for a Hub-to-Spoke VPN Using IPsec
- 17.21 Configuration Example for an IPsec Tunnel in an IPsec Tunnel
- 17.22 PKI Support for IPsec
  - 17.22.1 Certificates
  - 17.22.2 Certificate Authority
  - 17.22.3 Certificate Revocation List
  - 17.22.4 CRL Distribution Point
  - 17.22.5 Distinguished Name
  - 17.22.6 Entity
  - 17.22.7 Lightweight Directory Access Protocol
  - 17.22.8 PKI Repository
  - 17.22.9 Registration Authority
  - 17.22.10 Requester
  - 17.22.11 Certificate Enrollment Using SCEP
    - 17.22.11.1 Types of Enrollment
    - 17.22.11.2 Requirements for Requesting a Certificate
    - 17.22.11.3 Communications Between Requesters and the CA
  - 17.22.12 Configuring PKI
    - 17.22.12.1 Configuring an Entity Distinguished Name
    - 17.22.12.2 Creating a Trustpoint
    - 17.22.12.3 Configuring CA Authentication
    - 17.22.12.4 Generating a Certificate Request
    - 17.22.12.5 Extended Key Usage
    - 17.22.12.6 Creating a PKI Enrollment Profile
    - 17.22.12.7 Installing Identity Certificates
    - 17.22.12.8 Clearing the Certificate Revocation List (CRL) and PKI Counters
    - 17.22.12.9 Enabling PKI Logging
    - 17.22.12.10 Displaying PKI Information
HTTP and HTTPS Authentication
- 18 HTTP and HTTPS
  - 18.1 Web Authentication Overview
  - 18.2 Captive Portal Authentication (External Web Authentication)
    - 18.2.1 Captive Portal Profile for External Web Authentication
    - 18.2.2 Captive Portal on a VLAN
    - 18.2.3 Dynamic IP ACLs in Web Authentication
    - 18.2.4 Configuration Considerations for Applying IP ACLs
    - 18.2.5 Dynamically Applying Existing ACLs
    - 18.2.6 RADIUS Attribute for Session Timeout
  - 18.3 Web Authentication Configuration Considerations
  - 18.4 Web Authentication Configuration Tasks
  - 18.5 Prerequisites for Captive Portal Support with RUCKUS Cloudpath
  - 18.6 Prerequisites for Configuring Captive Portal with Aruba ClearPass
  - 18.7 Prerequisites for Configuring External Web Authentication with Cisco ISE
  - 18.8 Prerequisite Configurations on an ICX Switch for Captive Portal Authentication
  - 18.9 Creating the Captive Portal Profile for External Web Authentication
  - 18.10 Configuring Captive Portal (External Web Authentication)
  - 18.11 Enabling and Disabling Web Authentication
  - 18.12 Web Authentication Mode Configuration
    - 18.12.1 Using Local User Databases
      - 18.12.1.1 Configuring a Local User Database
      - 18.12.1.2 Creating a Local User Database
      - 18.12.1.3 Adding a User Record to a Local User Database
      - 18.12.1.4 Deleting a User Record from a Local User Database
      - 18.12.1.5 Deleting All User Records from a Local User Database
      - 18.12.1.6 Creating a Text File of User Records
      - 18.12.1.7 Importing a Text File of User Records from a TFTP Server
      - 18.12.1.8 Using a RADIUS Server as the Web Authentication Method
      - 18.12.1.9 Setting the Local User Database Authentication Method
      - 18.12.1.10 Setting the Web Authentication Failover Sequence
      - 18.12.1.11 Assigning a Local User Database to a Web Authentication VLAN
    - 18.12.2 Passcodes for User Authentication
      - 18.12.2.1 Configuring Passcode Authentication
      - 18.12.2.2 Creating Static Passcodes
      - 18.12.2.3 Enabling Passcode Authentication
      - 18.12.2.4 Configuring the Length of Dynamically Generated Passcodes
      - 18.12.2.5 Configuring the Passcode Refresh Method
      - 18.12.2.6 Configuring a Grace Period for an Expired Passcode
      - 18.12.2.7 Flushing All Expired Passcodes that Are in the Grace Period
      - 18.12.2.8 Disabling and Re-enabling Passcode Logging
      - 18.12.2.9 Resending the Passcode Log Message
      - 18.12.2.10 Manually Refreshing the Passcode
    - 18.12.3 Automatic Authentication
  - 18.13 Web Authentication Options
    - 18.13.1 Enabling RADIUS Accounting for Web Authentication
    - 18.13.2 Changing the Login Mode (HTTPS or HTTP)
    - 18.13.3 Specifying Trusted Ports
    - 18.13.4 Specifying Hosts that Are Permanently Authenticated
    - 18.13.5 Configuring the Re-authentication Period
    - 18.13.6 Defining the Web Authentication Cycle
    - 18.13.7 Limiting the Number of Web Authentication Attempts
    - 18.13.8 Clearing Authenticated Hosts from the Web Authentication Table
    - 18.13.9 Setting and Clearing the Block Duration for Web Authentication Attempts
    - 18.13.10 Manually Blocking and Unblocking a Specific Host
    - 18.13.11 Limiting the Number of Authenticated Hosts
    - 18.13.12 Filtering DNS Queries
    - 18.13.13 Forcing Re-authentication When Ports Are Down
    - 18.13.14 Forcing Re-authentication After an Inactive Period
    - 18.13.15 Defining the Web Authorization Redirect Address
    - 18.13.16 Deleting a Web Authentication VLAN
    - 18.13.17 Web Authentication Pages
      - 18.13.17.1 Displaying Text for Web Authentication Pages
      - 18.13.17.2 Customizing Web Authentication Pages
  - 18.14 Image Download over HTTPS
  - 18.15 Configuration Download over HTTPS
  - 18.16 Configuration Upload over HTTPS
  - 18.17 Displaying Web Authentication Information
    - 18.17.1 Displaying the Web Authentication Configuration
    - 18.17.2 Displaying a List of Authenticated Hosts
    - 18.17.3 Displaying a List of Hosts Attempting to Authenticate
    - 18.17.4 Displaying a List of Blocked Hosts
    - 18.17.5 Displaying a List of Local User Databases
    - 18.17.6 Displaying a List of Users in a Local User Database
    - 18.17.7 Displaying Passcodes
    - 18.17.8 Displaying Captive Portal Profile Details
Denial of Service Protection
- 19 Protecting against Denial of Service Attacks
  - 19.1 Denial of Service Protection Overview
  - 19.2 Protecting against Smurf Attacks
    - 19.2.1 Avoiding Being an Intermediary in a Smurf Attack
    - 19.2.2 Avoiding Being a Victim in a Smurf Attack
      - 19.2.2.1 Configuring Threshold Values for ICMP Packets Globally
      - 19.2.2.2 Configuring ICMP Threshold Values on an Interface
  - 19.3 Protecting against TCP SYN Attacks
    - 19.3.1 Configuring Threshold Values for TCP SYN Packets Globally
    - 19.3.2 Configuring TCP SYN Threshold Values on an Interface
    - 19.3.3 TCP MSS Adjustment Overview
    - 19.3.4 Example
    - 19.3.5 Impact on Existing Functionality
    - 19.3.6 DDOS Limitations
    - 19.3.7 TCP MSS Adjustment Limitations
  - 19.4 Displaying Statistics from a DoS Attack
  - 19.5 Clear DoS Attack Statistics
20 IPv6 RA Guard
- 20.1 Securing IPv6 Address Configuration
- 20.2 IPv6 RA Guard Overview
  - 20.2.1 RA Guard Policy
  - 20.2.2 Whitelist
  - 20.2.3 Prefix List
  - 20.2.4 Maximum Preference
  - 20.2.5 Trusted, Untrusted, and Host Ports
- 20.3 Configuration Notes and Feature Limitations for IPv6 RA Guard
- 20.4 Configuring IPv6 RA Guard
- 20.5 Example of Configuring IPv6 RA Guard
  - 20.5.1 Example: Configuring IPv6 RA Guard on a Device
  - 20.5.2 Example: Configuring IPv6 RA Guard in a Network
  - 20.5.3 Example: Verifying the RA Guard Configuration
21 Joint Interoperability Test Command
- 21.1 JITC Overview
OpenSSL Acknowledgements
- 22 OpenSSL License
  - 22.1 OpenSSL License
23 Keychain Module
- 23.1 Keychain Module Overview
  - 23.1.1 Components of a Keychain
  - 23.1.2 OSPF Keychain Authentication
  - 23.1.3 Configuring a Keychain Module

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