User Guide
Table Of Contents
- Nortel WLAN Security Switch 2300 Series Configuration Guide
- Contents
- How to get Help
- Introducing the Nortel WLAN 2300 System
- Using the Command-Line Interface
- Configuring AAA for Administrative and Local Access
- Configuring and Managing Ports and VLANs
- Configuring and Managing Ports
- Configuring and Managing VLANs
- Managing the Layer 2 Forwarding Database
- Port and VLAN Configuration Scenario
- Configuring and Managing IP Interfaces and Services
- MTU Support
- Configuring and Managing IP Interfaces
- Configuring the System IP Address
- Configuring and Managing IP Routes
- Managing the Management Services
- Configuring and Managing DNS
- Configuring and Managing Aliases
- Configuring and Managing Time Parameters
- Setting the Time Zone
- Configuring the Summertime Period
- Statically Configuring the System Time and Date
- Displaying the Time and Date
- Configuring and Managing NTP
- Adding an NTP Server
- Removing an NTP Server
- Changing the NTP Update Interval
- Resetting the Update Interval to the Default
- Enabling the NTP Client
- Displaying NTP Information
- Managing the ARP Table
- Pinging Another Device
- Logging In to a Remote Device
- Tracing a Route
- IP Interfaces and Services Configuration Scenario
- Configuring SNMP
- Overview
- Configuring SNMP
- Displaying SNMP Information
- Configuring and Managing Mobility Domain Roaming
- Configuring User Encryption
- Configuring AP access points
- AP Overview
- Configuring AP access points
- Specifying the Country of Operation
- Configuring a Template for Automatic AP Configuration
- Configuring AP Port Parameters
- Configuring AP-WSS Security
- Configuring a Service Profile
- Configuring a Radio Profile
- Configuring Radio-Specific Parameters
- Mapping the Radio Profile to Service Profiles
- Assigning a Radio Profile and Enabling Radios
- Disabling or Reenabling Radios
- Displaying AP Information
- Displaying AP Configuration Information
- Displaying a List of Distributed APs
- Displaying a List of Distributed APs that Are Not Configured
- Displaying Connection Information for Distributed APs
- Displaying Service Profile Information
- Displaying Radio Profile Information
- Displaying AP Status Information
- Displaying AP Statistics Counters
- Configuring RF Auto-Tuning
- Wi-Fi Multimedia
- Configuring and Managing Spanning Tree Protocol
- Configuring and Managing IGMP Snooping
- Configuring and Managing Security ACLs
- About Security Access Control Lists
- Creating and Committing a Security ACL
- Mapping Security ACLs
- Modifying a Security ACL
- Using ACLs to Change CoS
- Enabling Prioritization for Legacy Voice over IP
- Security ACL Configuration Scenario
- Managing Keys and Certificates
- Why Use Keys and Certificates?
- About Keys and Certificates
- Creating Keys and Certificates
- Choosing the Appropriate Certificate Installation Method for Your Network
- Creating Public-Private Key Pairs
- Generating Self-Signed Certificates
- Installing a Key Pair and Certificate from a PKCS #12 Object File
- Creating a CSR and Installing a Certificate from a PKCS #7 Object File
- Installing a CA’s Own Certificate
- Displaying Certificate and Key Information
- Key and Certificate Configuration Scenarios
- Configuring AAA for Network Users
- About AAA for Network Users
- AAA Tools for Network Users
- Configuring 802.1X Authentication
- Configuring Authentication and Authorization by MAC Address
- Configuring Web-based AAA
- Configuring Last-Resort Access
- Configuring AAA for Users of Third-Party APs
- Assigning Authorization Attributes
- Overriding or Adding Attributes Locally with a Location Policy
- Configuring Accounting for Wireless Network Users
- Displaying the AAA Configuration
- Avoiding AAA Problems in Configuration Order
- Configuring a Mobility Profile
- Network User Configuration Scenarios
- Configuring Communication with RADIUS
- Managing 802.1X on the WSS Switch
- Managing Sessions
- Managing System Files
- Rogue Detection and Countermeasures
- About Rogues and RF Detection
- Summary of Rogue Detection Features
- Configuring Rogue Detection Lists
- Enabling Countermeasures
- Disabling or Reenabling Active Scan
- Enabling AP Signatures
- Disabling or Reenabling Logging of Rogues
- Enabling Rogue and Countermeasures Notifications
- IDS and DoS Alerts
- Displaying RF Detection Information
- Appendix A: Troubleshooting a WS Switch
- Fixing Common WSS Setup Problems
- Recovering the System Password
- Configuring and Managing the System Log
- Running Traces
- Using Show Commands
- Remotely Monitoring Traffic
- Capturing System Information for Technical Support
- Appendix B: Supported RADIUS Attributes
- Appendix C: Mobility Domain Traffic Ports
- Appendix D: DHCP Server
- Glossary
- Index
- Command Index
198 Configuring User Encryption
320657-A
TKIP Countermeasures
WPA access ports and clients verify the integrity of a wireless frame received on the network by generating a keyed
message integrity check (MIC). The Michael MIC used with TKIP provides a holddown mechanism to protect the
network against tampering.
• If the recalculated MIC matches the MIC received with the frame, the frame passes the integrity check and the
access point or client processes the frame normally.
• If the recalculated MIC does not match the MIC received with the frame, the frame fails the integrity check. This
condition is called a MIC failure. The access point or client discards the frame and also starts a 60-second timer. If
another MIC failure does not occur within 60 seconds, the timer expires. However, if another MIC failure occurs
before the timer expires, the device takes the following actions:
● An AP access point that receives another frame with an invalid MIC ends its sessions with all TKIP
and WEP clients by disassociating from the clients. This includes both WPA WEP clients and
non-WPA WEP clients. The access point also temporarily shuts down the network by refusing all
association or reassociation requests from TKIP and WEP clients. In addition, WSS Software
generates an SNMP trap that indicates the WSS port and radio that received frames with the two
MIC failures as well as the source and destination MAC addresses in the frames.
● A client that receives another frame with an invalid MIC disassociates from its access point and does
not send or accept any frames encrypted with TKIP or WEP.
The AP access point or client refuses to send or receive traffic encrypted with TKIP or WEP for the
duration of the countermeasures timer, which is 60,000 milliseconds (60 seconds) by default. When the
countermeasures timer expires, the access point allows associations and reassociations and generates new
session keys for them. You can set the countermeasures timer for AP access point radios to a value from
0 to 60,000 milliseconds (ms). If you specify 0 ms, the radios do not use countermeasures but instead
continue to accept and forward encrypted traffic following a second MIC failure. However, WSS
Software still generates an SNMP trap to inform you of the MIC failure.
The MIC used by CCMP, CBC-MAC, is even stronger than Michael and does not require or provide countermeasures.
WEP does not use a MIC. Instead, WEP performs a cyclic redundancy check (CRC) on the frame and generates an
integrity check value (ICV).