HP 4108GL - 9 Using Passwords and Tacacs+ to Protect against Unauthorized Access; Contents

9-1
Using Passwords and
TACACS+
9
Using Passwords and TACACS+ To Protect Against
Unauthorized Access
Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
Configuring Username and Password Security . . . . . . . . . . . . . . . . . . 9-3
Menu: Configuring Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
CLI: Setting Manager and Operator Passwords . . . . . . . . . . . . . . . . . . . 9-6
Web: Configuring User-Names and Passwords . . . . . . . . . . . . . . . . . . . 9-7
TACACS+ Authentication for Central Control of Switch
Access Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8
Terminology Used in TACACS Applications: . . . . . . . . . . . . . . . . . . . . 9-9
General System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-10
General Authentication Setup Procedure . . . . . . . . . . . . . . . . . . . . . . 9-11
Configuring TACACS+ on the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . 9-14
Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-14
Viewing the Switch’s Current Authentication Configuration . . . 9-14
Viewing the Switch’s Current TACACS+ Server Contact
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-15
Configuring the Switch’s Authentication Methods . . . . . . . . . . . 9-16
Configuring the Switch’s TACACS+ Server Access . . . . . . . . . . . 9-19
How Authentication Operates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-24
General Authentication Process Using a TACACS+ Server . . . . 9-24
Local Authentication Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-25
Using the Encryption Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-26
General Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-26
Encryption Options in the Switch . . . . . . . . . . . . . . . . . . . . . . . . . 9-27
Controlling Web Browser Interface Access When Using TACACS+
Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-28
Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-28
Operating Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-29
Troubleshooting TACACS+ Operation . . . . . . . . . . . . . . . . . . . . . . . . . 9-29