Cisco 7604 Configuration Guide - Page 210
Kerberos Server Support, LDAP Server Support, Local Database Support, User Profiles, Fallback Support
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AAA Server and Local Database Support Chapter 11 Configuring AAA Servers and the Local Database Note NT servers have a maximum length of 14 characters for user passwords. Longer passwords are truncated. This is a limitation of NTLM Version 1. Kerberos Server Support The FWSM can use Kerberos servers for VPN-based management connections. When a user attempts to establish VPN access, and the traffic matches an authentication statement, the FWSM consults the Kerberos server for user authentication and grants or denies user access based on the response from the server. The FWSM supports 3DES, DES, and RC4 encryption types. Note The FWSM does not support changing user passwords during tunnel negotiation. To avoid this situation happening inadvertently, disable password expiration on the Kerberos/Active Directory server for users connecting to the FWSM. LDAP Server Support The FWSM can use LDAP servers for authorization of VPN-based management connections. When user authentication for VPN access has succeeded and the applicable tunnel-group record specifies an LDAP authorization server group, the FWSM queries the LDAP server and applies to the VPN session the authorizations it receives. Local Database Support The FWSM maintains a local database that you can populate with user profiles. This section contains the following topics: • User Profiles, page 11-6 • Fallback Support, page 11-6 User Profiles User profiles contain, at a minimum, a username. Typically, a password is assigned to each username, although passwords are optional. The username attributes command enables you to enter the username mode. In this mode, you can add other information to a specific user profile. The information you can add includes VPN-related attributes, such as a VPN session timeout value. Fallback Support With the exception of fallback for network access authentication, the local database can act as a fallback method for the functions in Table 11-1. This behavior is designed to help you prevent accidental lockout from the FWSM. 11-6 Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM OL-20748-01
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