Version 5.8
221
September 2009
SIP User's Manual
6. Configuration Parameters Reference
6.1.5
NAT and STUN Parameters
The Network Address Translation (NAT) and Simple Traversal of UDP through NAT
(STUN) parameters are described in the table below.
Table 6-5: NAT and STUN Parameters
Parameter
Description
Web: Enable STUN
EMS: STUN Enable
STUN Parameters
Determines whether Simple Traversal of UDP through NATs
(STUN) is enabled.
[EnableSTUN]
[0]
Disable (default)
[1]
When enabled, the device functions as a STUN client and
communicates with a STUN server located in the public Internet.
STUN is used to discover whether the device is located behind a
NAT and the type of NAT. In addition, it is used to determine the IP
addresses and port numbers that the NAT assigns to outgoing
signaling messages (using SIP) and media streams (using RTP,
RTCP and T.38). STUN works with many existing NAT types and
does not require any special behavior from them. For detailed
information on STUN, refer to ''
Enable
STUN''
450
on page
.
For this parameter to take effect, a device reset is required.
Notes:
For defining the STUN server domain name, use the
ini
Web: STUN Server Primary IP
EMS: Primary Server IP
file
parameter STUNServerDomainName.
Defines the IP address of the primary STUN server.
The valid range is the legal IP addresses. The default value is
0.0.0.0.
[STUNServerPrimaryIP]
Note:
Web: STUN Server Secondary
IP
EMS: Secondary Server IP
For this parameter to take effect, a device reset is required.
Defines the IP address of the secondary STUN server.
The valid range is the legal IP addresses. The default value is
0.0.0.0.
[STUNServerSecondaryIP]
Note:
For this parameter to take effect, a device reset is required.
Defines the domain name for the Simple Traversal of User
Datagram Protocol (STUN) server's address (used for retrieving all
STUN servers with an SRV query). The STUN client can perform
the required SRV query to resolve this domain name to an IP
address and port, sort the server list, and use the servers according
to the sorted list.
[STUNServerDomainName]
Notes:
For this parameter to take effect, a device reset is required.
Use either the STUNServerPrimaryIP or the
STUNServerDomainName parameter, with priority to the first
one.
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