Cisco Cisco Web Security Appliance S690 Guía Del Usuario
6-6
Cisco AsyncOS for Web User Guide
Chapter 6 Acquire End-User Credentials
Authentication Realms
Creating an Active Directory Authentication Realm
Before You Begin
•
Ensure you have the rights and domain information needed to join the Web Security appliance to the
Active Directory domain you wish to authenticate against.
Active Directory domain you wish to authenticate against.
•
If you plan to use “domain” as the NTLM security mode, use only nested Active Directory groups.
If Active Directory groups are not nested, use the default value, “ads”. See
If Active Directory groups are not nested, use the default value, “ads”. See
the Command Line Interface appendix of this guide.
•
Compare the current time on the Web Security appliance with the current time on the Active
Directory server and verify that the difference is no greater than the time specified in the “Maximum
tolerance for computer clock synchronization” option on the Active Directory server. If the Web
Security appliance is managed by a Security Management appliance, be prepared to ensure that
same-named authentication realms on different Web Security appliances have identical properties
defined on each appliance. Be aware that once you commit the new realm, you cannot change a
realm’s authentication protocol.
Directory server and verify that the difference is no greater than the time specified in the “Maximum
tolerance for computer clock synchronization” option on the Active Directory server. If the Web
Security appliance is managed by a Security Management appliance, be prepared to ensure that
same-named authentication realms on different Web Security appliances have identical properties
defined on each appliance. Be aware that once you commit the new realm, you cannot change a
realm’s authentication protocol.
Step 1
Choose Network > Authentication.
Step 2
Click Add Realm.
Step 3
Assign a unique name to the authentication realm using only alphanumeric and space characters.
Step 4
Select Active Directory in the Authentication Protocol and Scheme(s) field.
Step 5
Enter up to three fully-qualified domain names or IP addresses for the Active Directory server(s).
Example:
active.example.com
.
An IP address is required only if the DNS servers configured on the appliance cannot resolve the Active
Directory server hostname.
Directory server hostname.
When multiple authentication servers are configured in the realm, the appliance attempts to authorize
with up to three authentication servers before failing to authorize the transaction within this realm.
with up to three authentication servers before failing to authorize the transaction within this realm.
Step 6
Join the appliance to the domain:
a.
Configure the Active Directory Account:
b.
Click Join Domain.
Setting
Description
Active Directory Domain
The Active Directory server domain name.
Also known as a DNS Domain or realm.
Also known as a DNS Domain or realm.
NetBIOS domain name
If the network uses NetBIOS, provide the domain name.
Tip
If this option is not available use the
setntlmsecuritymode
CLI
command to verify that the NTLM security mode is set to
“domain”.
“domain”.
Computer Account
Specify a location within the Active Directory domain where AsyncOS
will create an Active Directory computer account, also known as a
“machine trust account”, to uniquely identify the computer on the domain.
will create an Active Directory computer account, also known as a
“machine trust account”, to uniquely identify the computer on the domain.
If the Active Directory environment automatically deletes computer
objects at particular intervals, specify a location for the computer account
that is in a container, protected from automatic deletion.
objects at particular intervals, specify a location for the computer account
that is in a container, protected from automatic deletion.