General Authentication Setup Procedure | HP 4100gl guide

TACACS+ Authentication

General Authentication Setup Procedure

Notes

The effectiveness of TACACS+ security depends on correctly using your TACACS+ server application. For this reason, HP recommends that you thoroughly test all TACACS+ configurations used in your network.

TACACS-aware HP switches include the capability of configuring multiple backup TACACS+ servers. HP recommends that you use a TACACS+ server application that supports a redundant backup installation. This allows you to configure the switch to use a backup TACACS+ server if it loses access to the first-choice TACACS+ server.

In release G.05.xx, TACACS+ does not affect web browser interface access. Refer to “Controlling Web Browser Interface Access When Using TACACS+ Authentication” on page 2-24.

Note

General Authentication Setup Procedure

It is important to test the TACACS+ service before fully implementing it. Depending on the process and parameter settings you use to set up and test TACACS+ authentication in your network, you could accidentally lock all users, including yourself, out of access to a switch. While recovery is simple, it may pose an inconvenience that can be avoided.To prevent an unintentional lockout on a Series 4100GL switch, use a procedure that configures and tests TACACS+ protection for one access type (for example, Telnet access), while keeping the other access type (console, in this case) open in case the Telnet access fails due to a configuration problem. The following procedure outlines a general setup procedure.

If a complete access lockout occurs on the switch as a result of a TACACS+ configuration, see "Troubleshooting TACACS+ Operation" in the Trouble shooting chapter of the Management and Configuration Guide for your switch.

1. Familiarize yourself with the requirements for configuring your TACACS+ server application to respond to requests from a Series 4100GL switches. (Refer to the documentation provided with the TACACS+ server software.) This includes knowing whether you need to configure an encryption key. (See “Using the Encryption Key” on page 2-23.)

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HP 4100gl manual General Authentication Setup Procedure

Contents

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