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JIRAIDAUTHSYM-27062
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Excerpt

This page explains how to configure the Sonus 

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to use Active Directory services.

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The Active Directory configuration part is where you turn on Active Directory (AD), set the way the Sonus 

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 will communicate with the AD server.

Info

The maximum amount of characters for the Active Directory Configuration attributes is 512.

The Cache Setting part is where you set up AD attribute caching.

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You must have already defined and added at least one domain controller to the Domain Controllers Table.

Configuring Active Directory Services on

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the SBC Edge

Excerpt
  1. In the WebUI, click the Settings tab.

  2. In the left navigation pane, go to Auth and Directory Services > Active Directory > Configuration.

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    1Active Directory Configuration
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Active Directory Configuration - Field Definitions

The fields in the Active Directory Configuration panel determine the manner in which Sonus which 

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communicates with the Active Directory server.

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Specifies whether or not Transport Layer Security (TLS) is used while communicating with Active Directory.

  • TLS = FALSE: MD5 Digest is used to secure the AD password over the wire.
Info

Since DCs do not support referral chasing or nested group lookups with MD5 Digest, you can't log in to Sonus

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using AD credentials if those credentials require referral chasing or nested group lookup by the DC. Instead, you can individually configure each DC you wish to query when someone attempts to log into the Sonus
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.

  • TLS = TRUE: TLS will be used to secure all communcation for requests to the DC.
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Referral chasing and nested group lookups are supported with TLS enabled. Again, this applies only to authenticating users attempting to log into the Sonus the 

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.


Info

AD lookups for call routing are executed the same regardless of the AD TLS configuration. DCs do not support referral chasing for call route lookups, therefore you must individually configure each DC that you wish to search for AD call routing queriequeries.


Operating Mode

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Specifies the method used by the Sonus the 

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to communicate with Active Directory in order to achieve a balance between performance and accuracy.

  • Online: All AD queries are sent directly to the DC - no information is cached. User authentication using Active Directory is also enabled in this mode. Online mode can result in a heavy DC load, thus using Online mode is not recommended.
  • Updates: In this mode, a local cache is built and used to lookup Active Directory searchable fields. If the SBC's cache is filled to capacity, first the cache, then the DC will be queried in attempts to find a match. User authentication using Active Directory is also enabled in this mode; however, sensitive information (including passwords) is not cached.
  • Auth-Only: Allows user authentication using Active Directory, but no Active Directory queries are allowed.
  • Cache Lookup Only: When selected, the SBC examines only the local AD Cache for the requested attribute. Even if the cache is filled to capacity, the DC will not be queried. The call fails if no match is found in the local cache.
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titleSBC 1000 Note:

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Sonus recommends the use of an external USB or ASM module for AD Cache backup on the SBC 1000 when either the Updates or Cache Only mode is the selected operating mode.


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An SNMP alarm will be generated if the local AD cache reaches capacity.


Info

If your cache reaches capacity when in Update Mode, the SBC will automatically query the DC for any entries that are not cached. Queries to the DC are never normalized. Routing may intermittently fail if your transformations rely on normalized cache entries.


Info

Be aware that Cache Normalization is not performed on queries to the DC, even in Update Mode with Normalize Cache set to True. Therefore, transformations that rely on normalization (e.g. msRTCSIP-Line transformations that do not include tel: ) will fail for queries that resort to a DC lookup. If you're cache reaches capacity:

  • Reduce the number of cached attributes so that the cache is no longer at capacity
  • Set Normalize Cache to False and modify any transformation that relies on the cache being normalized. (suggested)
  • Add transformations to route both normalized and non-normalized AD call route queries. (avoid)


Query/Cache Attributes

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Specifies which attributes are cached from Active Directory. The attribute names specified must be consistent with attribute names in Active Directory.

Nested Group Lookup for Authentication

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The fields in the Cache Settings panel determine how Active Directory attributes are cached locally and the frequency at which the local cache is updated. The Sonus The 

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maintains a local cache of Active Directory user attributes. AD caching enhances system performance and survivability.

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  • Survivability: In the event of a loss of communication with the Active Directory, whether through a loss of network connectivity or an AD server error, the Sonus 
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    is still able to perform authentication and authorization tasks based on the Local AD Cache.

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When Enabled, the SBC will raise an alarm and send an SNMP Trap if the AD Cache backup fails. This parameter controls the alarm and trap generation only. It does not control the AD Cache backup function.

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Encrypt AD Cache

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The Encrypt AD Cache option allows the SBC Edge (SBC 1000, SBC 2000. and SBC SWe Lite) to encrypt the AD cache when stored on any media (internal eUSB, external USB, or ASM). The AD cache contents can then only be viewed when it is decrypted with the correct password. This encryption secures the contents against unauthorized viewing.

Valid options: True (encrypts the AD cache) or False (does not encrypt the AD cache). Default entry: FalseSpecifies which attributes are cached from Active Directory. The attribute names specified must be consistent with attribute names in Active Directory.

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