Dns Parameters - AudioCodes Mediant 4000 SBC User Manual

CHAPTER 60 Configuration Parameters Reference
Parameter
[NATBindingDefaultTimeout]
'SIP NAT Detection'
configure voip > sip-
definition advanced-
settings > sip-nat-
detect
[SIPNatDetection]

DNS Parameters

The Domain name System (DNS) parameters are described in the table below.
'Default Primary DNS Server IP'
configure network > dns settings > dns-
default-primary-server-ip
[DefaultPrimaryDnsServerIp]
● UA behind NAT: The device sends media only when
the source of the media packets is the signaling IP
address (source of the INVITE). If the 'Media Latch
Mode' parameter is configured to Strict, the 'Media
Latch Mode' parameter automatically changes to
Dynamic.
● UA not behind NAT: The device sends media
according to option Disable NAT (1).
For more information on NAT traversal, see
Packet Mechanism.
The device sends SNMP keep-alive traps periodically - every
9/10 of the time configured by the parameter (in seconds).
Therefore, the parameter is applicable only if you configure
the [SendKeepAliveTrap] parameter to [1].
The parameter is used to allow SNMP communication with
AudioCodes One Voice Operations Center (OVOC)
management platform, located in the WAN, when the device
is located behind NAT. It is needed to keep the NAT pinhole
open for the SNMP messages sent from OVOC to the
device.
The valid range is 0 to 2,592,000. The default is 30.
Note: For the parameter to take effect, a device reset is
required.
Enables the device to detect whether the incoming INVITE
message is sent from an endpoint located behind NAT.
■ [0] Disable = Disables the device's NAT Detection
mechanism. Incoming SIP messages are processed as
received from endpoints that are not located behind NAT
and sent according to the SIP standard.
■ [1] Enable = (Default) Enables the device's NAT
Detection mechanism.
Table 60-13:DNS Parameters
Parameter
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Mediant 4000 SBC | User's Manual
Description
First Incoming
Description
Defines the address of the
default primary DNS
server.
The valid value is an IP
address in dotted-decimal
notation. The default is
8.8.8.8.