Matrix PRASAR UCS System Manual 801
Digest Authentication
What's this?
Digest Authentication is a challenge-based authentication service of SIP to authenticate the identity of the
originator of SIP request in the INVITE message. The recipient of the request can ascertain whether or not the
originator of the request is authorised to make the request. When the digest credentials of the originator—User
Name and Password—in the INVITE message are authenticated and accepted by the recipient, the originator and
the recipient are connected.
PRASAR UCS supports Digest Authentication. You may use Digest Authentication to
• restrict access to PRASAR UCS to specific callers.
• prevent unwanted or malicious calls.
How it works
The Digest Authentication feature works on the basis of the Digest Authentication Table, in which the credentials,
namely the User Name and Passwords of trusted/authorised calling party SIP devices are stored. You must
configure this table. The Digest Authentication Table is common for all SIP trunks on which this feature is enabled.
When you enable this feature on a SIP trunk, for all incoming calls (SIP requests):
• PRASAR UCS will challenge the identity of the calling party (the SIP device initiating the request) to send
its digest credentials.
• When the calling party sends its credentials, PRASAR UCS authenticates the credentials by matching it
with its Digest Authentication Table.
• If a match is found, the calling party will be authenticated and the call will be allowed on the SIP trunk.
• If no match is found, PRASAR UCS will consider it as invalid authentication information and rejects the
call.
How to configure
To use this feature on SIP Trunks, you must do the following:
• Enable Digest Authentication on the SIP trunks you want to use this feature.
• Configure the Digest Authentication Table.
Configuring Digest Authentication using Jeeves
• Login as System Engineer.
• Under Configuration, click the VoIP Configuration.
• Click Digest Authentication.
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