SMB SSL-VPN: Configuring the SSL-VPN Group Configuration for LDAP Authentication Domains

03/26/2020 107 People found this article helpful 486,004 Views

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Feature/Application:

Please Note: The Microsoft Active Directory database uses an LDAP organization schema. The Active Directory database may be queried using Kerberos authentication (the standard authentication type; this is labeled "Active Directory" domain authentication in the SonicWall SSL VPN appliance), NTLM authentication (labeled NT Domain authentication in SonicWall SSL VPN appliance), or using LDAP database queries. An LDAP domain configured in the SonicWall SSL VPN appliance can authenticate to an Active Directory server.

Procedure:

To configure LDAP authentication, perform the following steps:

Step 1 Click Add Domain to display the Add New Domain dialog box.
Step 2 Select LDAP from the Authentication Type menu. The LDAP domain configuration fields is displayed.

Step 3 Enter a descriptive name for the authentication domain in the Domain Name field. This is the domain name users will select in order to log into the SonicWall SSL-VPN appliance user portal. It can be the same value as the Server Address field.

Step 4 Enter the IP address or domain name of the server in the Server Address field. Portals > Domains

Step 5 Enter the search base for LDAP queries in the LDAP baseDN field. An example of a search base string is CN=Users,DC=yourdomain,DC=com.

Tip: It is possible for multiple OUs to be configured for a single domain by entering each OU on a separate line in the LDAP baseDN field. In addition, any sub-OUs will be automatically included when parents are added to this field.

Note: Do not include quotes ("") in the LDAP BaseDN field.

Step 6 Enter the common name of a user that has been delegated control of the container that user will be in along with the corresponding password in the Login Username and Login Password fields.

Note: When entering Login Username and Login Password, remember that the SSL-VPN appliance binds to the LDAP tree with these credentials and users can log in with their sAMAccountName.

Step 7 Enter the name of the layout in the Portal Name field. Additional layouts may be defined in the Portals > Portals page.

Step 8 Optionally select the Allow password changes (if allowed by LDAP server) checkbox. This option, if allowed by your LDAP server, will enable users to change their LDAP password during an SSL VPN session.

Step 9 Optionally select the Use SSL/TLS checkbox. This option allows for the SSL/TLS encryption to be used for LDAP password exchanges. This option is disabled by default as not all LDAP servers are configured for SSL/TLS.

Step 10 Optionally select the Enable client certificate enforcement checkbox to require the use of client certificates for login. By checking this box, you require the client to present a client certificate for strong mutual authentication. Two additional fields will appear:

Verify user name matches Common Name (CN) of client certificate - Select this checkbox to require that the user's account name match their client certificate.

Verify partial DN in subject - Use the following variables to configure a partial DN that will match the client certificate:

User name: %USERNAME%

Domain name: %USERDOMAIN%

Active Directory user name: %ADUSERNAME%

Wildcard: %WILDCARD%

Step 11: Optionally select the One-time passwords checkbox to enable the One Time Password feature. A drop-down list will appear, in which you can select if configured, required for all users, or using domain name. These are defined as:

if configured - Only users who have a One Time Password email address configured will use the One Time Password feature.

required for all users - All users must use the One Time Password feature. Users who do not have a One Time Password email address configured will not be allowed to login.

using domain name - Users in the domain will use the One Time Password feature. One Time Password emails for all users in the domain will be sent to username@domain.com .

If you selected if configured or required for all users in the One-time passwords drop-down list, the LDAP e-mail attribute drop-down list will appear, in which you can select mail, userPrincipalName, or custom. These are defined as:

mail - If your LDAP server is configured to store email addresses using the "mail" attribute, select mail.

mobile or pager - If your AD server is configured to store mobile or pager numbers using either of these attributes, select mobile or pager, respectively. Raw numbers cannot be used, however, SMS addresses can.

userPrincipalName - If your LDAP server is configured to store email addresses using the "userPrincipalName" attribute, select userPrincipalName.

custom - If your LDAP server is configured to store email addresses using a custom attribute, select custom. If the specified attribute cannot be found for a user, the email address assigned in the individual user policy settings will be used. If you select custom, the Custom attribute field will appear. Type the custom attribute that your LDAP server uses to store email addresses. If the specified attribute cannot be found for a user, the email address will be taken from their individual policy settings.

If using domain name is selected in the One-time passwords drop-down list, the E-mail domain field will appear instead of the LDAP e-mail attribute drop-down list. Type in the domain name where one-time password emails will be sent (for example, abc.com).

Step 12 Click Add to update the configuration and add the domain to the Domains Settings table.

Source: SonicWall SSL VPN 4.0 Administrator's Guide

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