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One Identity Safeguard for Privileged Sessions 6.9.3 - RADIUS Multi-Factor Authentication - Tutorial

[whitelist source=user_list]

The [whitelist source=user_list] section allows whitelisting users based on a User List policy configured in SPS (Policies > User Lists). To enable this whitelist, configure one of the use cases below.

NOTE: The user names are compared to the User List in a case-sensitive manner.

Declaration
[whitelist source=user_list]
name=<name-of-user-list-policy>

For details on creating user lists, see "Creating and editing user lists" in the Administration Guide.

name
Type: string
Required: no
Default: N/A

Description: The name of a User List policy containing gateway users configured on SPS (Policies > User Lists). You can use this option to selectively require multi-factor authentication for your users (for example, to create break-glass access for specific users).

Use case #1: Allow no user except certain users

To allow specific users to connect without providing RADIUS server credentials, the User List policy should have the following settings:

  • Set Allow to No user and list the users in the Except list.
  • Then type the name of this User List policy as the value of the name parameter.
Use case #2: Allow all users except certain users

To enforce RADIUS server authentication for selected users, the User List policy should have the following settings:

  • Set Allow to All users and list the users in the Except list.
  • Then type the name of this User List policy as the value of the name parameter.

[whitelist source=ldap_server_group]

The [whitelist source=ldap_server_group] section allows whitelisting users based on LDAP Server group membership. To enable this whitelist, configure one of the use cases below.

NOTE: The user names and groups are compared in LDAP in a case-insensitive manner.

Declaration
[whitelist source=ldap_server_group]
allow=<no_user-or-all_users>
except=<group-1>,<group-2>
allow
Type: string (all_users | no_users)
Required: no
Default: N/A

Description: This parameter defines whether to allow all users or no user to connect without providing RADIUS server credentials. Used together with the except parameter, you can define specific LDAP/AD group(s) that are exempt from this rule.

except
Type: string
Required: no
Default: N/A

Description: This parameter defines those specific LDAP/AD group(s) that are exempt from the rule defined by the allow parameter.

Use case #1: Allow no user except members of specific group(s)

To allow members of specific LDAP/AD group(s) to connect without providing RADIUS server credentials, type the names of these LDAP/AD groups as values of the except parameter and set the allow parameter to no_user:

[whitelist source=ldap_server_group]
allow=<no_user>
except=<group-1>,<group-2>

You must configure the name of the LDAP Server policy in the [ldap_server] section.

Use case #2: Allow all users except members of specific group(s)

To enforce RADIUS server authentication only on members of specific LDAP/AD group(s), type the names of these LDAP/AD groups as values of the except parameter and set the allow parameter to all_users:

[whitelist source=ldap_server_group]
allow=<all_users>
except=<group-1>,<group-2>

You must configure the name of the LDAP Server policy in the [ldap_server] section.

[USERMAPPING]

By default, SPS assumes that the external RADIUS server identity of the user is the same as the gateway username (that is, the username the user used to authenticate on SPS during the gateway authentication). If there was no gateway authentication, then the server username is used for authentication.

If the gateway usernames are different from the external RADIUS server identities, you must configure the SPS RADIUS plugin to map the gateway usernames to the external RADIUS server identities.

You can use the following methods:

  • Explicit mapping: [usermapping source=explicit]

  • LDAP server mapping: [usermapping source=ldap]

    To look up the external RADIUS server identity of the user from an LDAP/Active Directory database, configure the [usermapping source=ldap_server] section of the SPS RADIUS plugin.

    If the RADIUS server service requires the use of domain name in the external RADIUS server identity, configure the append_domain parameter in the [username_transform] section. In this case, SPS automatically appends the @ character and the value of this option to the username from the session, and uses the resulting username on the RADIUS server to authenticate the user. For example, if the domain is set to append_domain: example.com and the username is Example.User, the SPS plugin will look for the user Example.User@example.com on the RADIUS server server.

    If you configure both the append_domain parameter in the [username_transform] section and the [usermapping source=ldap_server] section of the SPS RADIUS plugin, SPS appends the @ character and the value of the append_domain parameter to the value retrieved from the LDAP database.

The Explicit method has priority over the LDAP server method.

If you have configured neither the append_domain parameter nor any of the [USERMAPPING] sections, SPS assumes that the external RADIUS server identity of the user is the same as the gateway username.

[usermapping source=explicit]

To map the gateway user name to an external RADIUS server identity, configure the following name-value pairs.

Declaration
[usermapping source=explicit]
<example-user-1>=<ID-1>
<example-user-2>=<ID-2>
<exampleuser>
Type: string
Required: no
Default: N/A

Description: To map the gateway user name to an external RADIUS server identity, configure the name-value pairs in the following way:

  • Type the gateway user name instead of <example-user-1>.

  • Type the external RADIUS server ID instead of <ID-1>.

NOTE: Use this option only if there are not only a few users, or for testing purposes. If there are too many users, it can cause performance issues.

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