150
V7122 GatewayUser Guide
ini
File Field Name
Web Parameter Name
Valid Range and Description
DNS2IP
[Internal DNS Table]
Internal DNS table, used to resolve host names to IP
addresses. Two different IP addresses (in dotted format
notation) can be assigned to a hostname.
DNS2IP = <Hostname>, <first IP address>, <second IP
address>
If the internal DNS table is configured, the gateway
first tries to resolve a domain name using this table.
If the domain name isn’t found, the gateway
performs a DNS resolution using an external DNS
server.
This parameter can appear up to 10 times.
EnableSTUN
[Enable STUN]
0 = STUN protocol is disabled (default).
1 = STUN protocol is enabled.
When enabled, the gateway functions as a STUN client and
communicates with a STUN server located in the public
internet. STUN is used to discover whether the gateway is
located behind a NAT and the type of that 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.
This parameter cannot be changed on-the-fly and requires a
gateway reset.
STUNServerPrimaryIP
[STUN Server Primary IP]
The IP address of the primary STUN server.
STUNServerSecondaryIP
[STUN Server Secondary IP]
The IP address of the secondary STUN server.
STUNServerDomainName
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.
Use either the STUNServerPrimaryIP or the
STUNServerDomainName parameter, with priority to
the first one.
NATBindingDefaultTimeout
Defines the default NAT binding lifetime in seconds. STUN is
used to refresh the binding information after this time expires.
The valid range is 0 to 2592000. The default value is 30.
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