Configuring the Switch’s TACACS+ Server Access | HP 4100gl specs

TACACS+ Authentication

Configuring TACACS+ on the Switch

Configuring the Switch’s TACACS+ Server Access

The tacacs-server command configures these parameters:

■ The host IP address(es) for up to three TACACS+ servers; one first choice and up to two backups. Designating backup servers provides for a continuation of authentication services in case the switch is unable to contact the first-choice server.

■ An optional encryption key. This key helps to improve security, and must match the encryption key used in your TACACS+ server appli- cation. In some applications, the term "secret key" or "secret" may be used instead of "encryption key". If you need only one encryption key for the switch to use in all attempts to authenticate through a TACACS+ server, configure a global key. However, if the switch is configured to access multiple TACACS+ servers having different encryption keys, you can configure the switch to use different encryp- tion keys for different TACACS+ servers.

■ The timeout value in seconds for attempts to contact a TACACS+

	server. If the switch sends an authentication request, but does not
	receive a response within the period specified by the timeout value,
	the switch resends the request to the next server in its Server IP Addr
	list, if any. If the switch still fails to receive a response from any
	TACACS+ server, it reverts to whatever secondary authentication
	method was configured using the aaa authentication command (local
	or none; see “Configuring the Switch’s Authentication Methods” on
	page 2-11.)

Note	As described under “General Authentication Setup Procedure” on page 2-6,
	HP recommends that you configure, test, and troubleshoot authentication via
	Telnet access before you configure authentication via console port access.
	This helps to prevent accidentally locking yourself out of switch access due
	to errors or problems in setting up authentication in either the switch or your
	TACACS+ server.

2-15

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HP 4100gl manual Configuring the Switch’s TACACS+ Server Access, TACACS+ server

Contents

Access security guide Hp procurve Series 4100gl switches Page Access Security Guide HP Procurve Series 4100GL Switches Publication Number Contents Configuring the Switch for Radius Authentication Controlling Web Browser Interface Access When When Using Radius Authentication Controlling Web Browser Interface Access Further Information on SSH Client Public-Key Authentication Operating Rules for Authorized-Client General Setup Procedure forConfiguring Switch Ports To Operate As Supplicants for 802.1x Connections to Other Switches Resetting Alert Flags Operating Notes for Port Security How RADIUS/802.1x Authentication Affects Vlan OperationPort Security Command Options and Operation Web Displaying and Configuring Port Security Features Defining Authorized Management Stations Page Getting Started Contents Introduction Overview of Access Security FeaturesGetting Started Xiii Command Prompts Command Syntax ConventionsSimulating Display Output Screen Simulations Related Publications Getting Started Click on technical support Getting Documentation From the Web Sources for More Information Main Menu of the Menu interface, select To Set Up and Install the Switch in Your NetworkRun Setup Need Only a Quick Start?Page Configuring Username and Password Security Level Actions Permitted Configuring Username and Password SecurityFeature Default Menu Overview Passwords are case-sensitive Console Passwords Configuring Local Password SecurityMenu Setting Passwords To set a new password Commands Used in This Section CLI Setting Passwords and UsernamesContinue Deletion of password protection? No Configuring Manager and Operator Passwords Enter Web Setting Passwords and UsernamesClick on Device Passwords Click on the Security tab Using TACACS+ Authentication Messages Operating Notes TACACS+ Authentication Example of TACACS+ Operation TACACS+ Authentication TACACS+ Authentication Terminology Used in Tacacs Applications General System Requirements General Authentication Setup Procedure Determine the following Result in Operator read-only access. Thus, when configuringAdditional features that the application offers Always used as the secondary access control method Telnet Before You Begin Configuring TACACS+ on the SwitchCLI Commands Described in this Section Command This example shows the default authentication configuration Viewing the Switch’s Current Authentication Configuration Configuring the Switch’s Authentication Methods Method/privilege path. Available only if the primary method AAA Authentication ParametersName Default Range Function Authentication for the access being configured is local Login Primary to Local authentication Primary/Secondary Authentication Table HPswitchconfig# aaa authentication num-attempts TACACS+ server Configuring the Switch’s TACACS+ Server Access Syntax tacacs-server host ip-addr key key-string None Name Default Range None null Timeout 1 To configure north01 as a per-server encryption key HPswitchconfig# no tacacs-server host General Authentication Process Using a TACACS+ Server How Authentication OperatesChanges without executing write mem TACACS+ Authentication Authentication Local Authentication Process Using the Encryption Key HPswitchconfig# tacacs-server key north40campus CLI Message Meaning Tacacs-server configurationMessages Related to TACACS+ Operation Operating Notes Rized persons Controlling Web Browser Interface Access When Using Radius Radius Authentication and Accounting Radius Authentication and Accounting Port-Access Terminology Switch Operating Rules for Radius Preparation for Configuring Radius on the Switch General Radius Setup Procedure Outline of the Steps for Configuring Radius Authentication Configuring the Switch for Radius AuthenticationRadius Authentication Commands Server IP address Used on the specified Radius server. Default nullConfigure the global Radius parameters Radius server documentation Local none Authentication Process on Example Configuration for Radius Authentication Configuring Radius Accounting instead of continuing here Configure the Switch To Access a Radius Server Radius Authentication and Accounting Key global-key-string Configure the Switch’s Global Radius Parameters To an authentication request before counting the attempt as Listings of Global Radius Parameters Configured In Figure Local Authentication Process Word pair for the level you want to enter Radius Accounting Commands Configuring Radius AccountingOn page 3-5 before continuing here Operating Rules for Radius Accounting Steps for Configuring Radius Accounting Configure the Switch To Access a Radius Server Radius Authentication and Accounting Start-Stop Example of Configuring Accounting Types Update period General Radius Statistics Viewing Radius Statistics PendingRequests Term Definition Radius Authentication Statistics Radius Accounting Statistics 14. Listing the Accounting Configuration in the Switch 17. Search Order for Accessing a Radius Server Changing RADIUS-Server Access Order 18. Example of New Radius Server Search Order Message Meaning Messages Related to Radius OperationPage Configuring the Switch for SSH Operation Configuring Secure Shell SSH Configuring Secure Shell SSH Client Public Key Authentication Model 3DES 168-bit Use a key to authenticate itself to the switchDES 56-bit Prerequisite for Using SSH SSH Options Public Key Formats Ssh enable radius Switch Primary SSH Authenticate Primary SwitchManager Ssh enable local Enable Ssh enable tacacs Configuring Secure Shell SSH General Operating Rules and Notes SSH-Related Commands in This Section Configuring the Switch for SSH Operation Example of Configuring Local Passwords Generating the Switch’s Public and Private Key Pair CLI kill command To the switch using the earlier pairPair automatically disables SSH For example, to generate and display a new key Providing the Switch’s Public Key to ClientsOperation Example of a Public Key Generated by the Switch Inserted Bit Exponent Modulus Switch’s Public and Private Key Pair on To enable SSH on the switch On the switch by appearing to be you Version of SSH to accept connections from. default 1-or-2 Option a Configuring SSH Access for Password-Only SSH Configuring the Switch for SSH Authentication U t i o n Configures 14 shows how to check the results of the above commands Use an SSH Client To Access the Switch Further Information on SSH Client Public-Key Authentication 15. Example of a Client Public Key Ascii Property Supported Comments Value Show crypto client-public-key babble fingerprint Deletes the client-public-key file from the switch 00000K Peer unreachable Messages Related to SSH Operation Key for the switch Comments on certificate fields Assigning a Local Login Operator Configuring Secure Socket Layer SSL Server Certificate authentication with User Password RC4 40-bit, 128-bit 3DES 168-bit, 112 Effective General steps for configuring ssl include Client Preparation Prerequisite for Using SSL Provided with your browser General Operating Rules and Notes Assigning a Local Login Operator and Enable ManagerPassword Configuring the Switch for SSL OperationSSL-Related CLI Commands in This Section Security Tab Password Button Earlier certificate Generating the Switch’s Server Host CertificateParticular switch/client session, and then discarded Verified unequivocally CLI CLI commands used to generate a Server Host Certificate For example, to generate a key and a new host certificate Certificate Field DescriptionsField Name Description For example, to display the new server host certificate CLI Command to view host certificatesHost-cert command Can resume SSL operation New key then just select current from the list Installed certificateSelect the Generate Certificate button Iii Select Self signed certificate in the type box Configuring Secure Socket Layer SSL Web browser Interface showing current SSL Host Certificate Configuring Secure Socket Layer SSL Certificate Request Certificate Request Reply T e Execute no web-management ssl Zeroize the switch’s host certificate or certificate key . Enable SLL Port number Selection Error During Possible Cause Common Errors in SSL setupPage General Operating Rules and Notes -9 General Setup Procedure for Port-Based Access ControlMessages Related to 802.1x Operation -47 802.1x on the Series 4100GL switches includes the following Why Use Port-Based Access Control?General Features Refer to Radius Authentication and Accounting on Configuring Port-Based Access Control Authenticating One Switch to Another .1x authentication also How 802.1x Operates Authenticator Operation Example of Supplicant Operation Switch-Port Supplicant Operation Terminology 802.1x standard General Operating Rules and Notes Configuring Port-Based Access Control Do These Steps Before You Configure 802.1x Operation General Setup Procedure for Port-Based Access Control Authenticators operate as expected Overview Configuring 802.1x Authentication on Switch Configuring Port-Based Access Control 802.1x Authentication Commands Configuring Switch Ports as Authenticators To activate 802.1x authentication on the switch Enable 802.1x Authentication on Selected Ports Tx-period 0 Clears authenticator statistics counters Chap-radius Configure the 802.1x Authentication MethodLocal Eap-radius Enter the Radius Host IP Addresses Enable 802.1x Authentication on the Switch 802.1x Open Vlan Mode 802.1x-Related Show Commands Radius server configurationIntroduction Tagged Vlan as the Unauthorized-Client Vlan Use Models for 802.1x Open Vlan Modes Port as a static, tagged member of the VLAN, membership 802.1x Per-Port Configuration Port Response Condition Rule Multiple Authenticator Ports Using Before you configure the 802.1x Open Vlan mode on a port Setting Up and Configuring 802.1x Open Vlan Mode Mised by an unauthorized client Port-Security To Allow Only 802.1x Devices on Activate authentication on the switchVlan Operation HPswitchconfig# aaa authentication port-access eap-radius 802.1x Open Vlan Operating Notes Action none send-alarm send-disable Enables 802.1x authentication on the port 802.1x Authentication Commands 802.1x Supplicant Commands Specified ports Authenticator at the same time Enter secret password Repeat secret password Syntax aaa port-access supplicant ethernet port-list Max-start 1 Show Commands for Port-Access Authenticator Displaying 802.1x Configuration, Statistics, and Counters Viewing 802.1x Open Vlan Mode Status Page To the port Open Vlan Mode Status Configuring Port-Based Access Control Supplicant port detects a different authenticator device Show Commands for Port-Access SupplicantSwitch reboots How RADIUS/802.1x Authentication Affects Vlan Operation Example of an Active Vlan Configuration Otherwise, port A2 is not listed Assignment 1x Operating Messages Messages Related to 802.1x OperationPage Blocking Unauthorized Traffic -3 Trunk Group Exclusion -4 Basic OperationRetention of Static Addresses Basic Operation Configuring and Monitoring Port Security Blocking Unauthorized Traffic Security Trunk Group Exclusion Planning Port Security Acquires and maintains authorized addresses Port Security Command Options OperationPort Security Commands Used in This Section Commands Mac-address mac-addr Port Security ParametersMode Address address-limit integer Parameter Description Retention of Static AddressesClear- clear-intrusion-flag Using the CLI To Display Port Security Settings Displaying Current Port Security Settings Configuring Port Security Configuring and Monitoring Port Security Example of Adding an Authorized Device to a Port Entry in the table on Command option removes unwanted devices MAC addresses fromDevice’s MAC address. For example Removing a Device From the Authorized List for a Port. This Remove 0c0090-123456 from the Authorized Address list To automatically become authorized Reading Intrusion Alerts and Resetting Alert Flags Web Displaying and Configuring Port Security FeaturesClick on Port Security Example of Multiple Intrusion Log Entries for the Same Port How the Intrusion Log Operates Intrusion flag FlagsOperates as follows It detects 11. Example of the Intrusion Log Display Type I Intrusion log to display the Intrusion Log List intrusion log content Intrusion Alert on port A1 Event Log lists port security intrusions as 14. Example of Port Status Screen After Alert Flags Reset Operating Notes for Port Security Configuring and Monitoring Port Security Page Building IP Masks Using Authorized IP Managers Using Authorized IP Managers Authorized IP Manager Features You can configure Access LevelsOptions Overview of IP Mask Operation Defining Authorized Management Stations From the console Main Menu, select Menu Viewing and Configuring IP Authorized ManagersSwitch Configuration IP Authorized Managers Building IP Masks on Authorized IP Managers Commands Used in This Section CLI Viewing and Configuring Authorized IP Managers IP Mask Configuring IP Authorized Managers for the Switch Address of the authorized manager you want to delete Web Configuring IP Authorized ManagersClick on Authorized Addresses Manager IP Configuring One Station Per Authorized Manager IP EntryBuilding IP Masks Authorized 227 125 Using Authorized IP Managers IP Mask 255 249 125, or 127 can access the switchBuilding IP Masks Any value from 0 to Results Additional Examples for Authorizing Multiple StationsAuthorized Using Authorized IP Managers Page Index Index See port access control OpenSSH … 4-3,5-2 operating notes See SSH. proxy Web server … Quick start … SSL See RADIUS. … 3-4 troubleshoot … 2-15 troubleshooting Index Page 5990-3032