AudioCodes Mediant 4000 SBC User Manual page 362

CHAPTER 18 Core Entities
'Enable Un-Authenticated
Registrations'
enable-un-auth-registrs
[SRD_
EnableUnAuthenticatedRegistrations]
Parameter Description
■ The option, Accept Registered Users from Same
Source [2] does not apply to registration
refreshes. These requests are accepted even if
the source address is different to that registered
with the device.
■ When the device rejects a call, it sends a SIP 500
"Server Internal Error" response to the user. In
addition, it reports the rejection (Dialog establish
failure - Classification failure) using the Intrusion
Detection System (IDS) feature (see
IDS Policies), by sending an SNMP trap.
■ When the corresponding parameter in the SIP
Interfaces table (SIPInterface_
BlockUnRegUsers) is configured to any value
other than default [-1] for a SIP Interface that is
associated with the SRD, the parameter in the
SRDs table is ignored for calls belonging to the
SIP Interface.
Enables the device to accept REGISTER requests
and register them in its registration database from
new users that have not been authenticated by a
proxy/registrar server (due to proxy down) and thus,
re-routed to a User-type IP Group.
In normal operation scenarios in which the proxy
server is available, the device forwards the
REGISTER request to the proxy and if authenticated
by the proxy (i.e., device receives a success
response), the device adds the user to its registration
database. The routing to the proxy is according to the
SBC IP-to-IP Routing table where the destination is
the proxy's IP Group. However, when the proxy is
unavailable (e.g., due to network connectivity loss),
the device can accept REGISTER requests from
new users if a matching alternative routing rule exists
in the SBC IP-to-IP Routing table where the
destination is the user's User-type IP Group (i.e., call
survivability scenarios) and if the parameter is
enabled.
■ [0] Disable = The device rejects REGISTER
requests from new users that were not
authenticated by a proxy server.
■ [1] Enable = (Default) The device accepts
REGISTER requests from new users even if they
were not authenticated by a proxy server, and
registers the user in its registration database.
Note:
■ Regardless of the parameter, the device always
accepts registration refreshes from users that are
already registered in its database.
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Mediant 4000 SBC | User's Manual
Configuring