Four Channel’s GSM VoIP Gateway
27
SIP Signaling NAT Traversal
has 3 kinds:
A) None
Select
None
to disable this feature.
B) STUN
（
RFC 3489
）
STUN
(
Simple Traversal of UDP (User Datagram Protocol) through NATS
(Network Address Translators)
) is a network protocol allowing a client behind a
NAT (or multiple NATS) to find out its public address, the type of NAT it is behind
and the internet-side port associated by the NAT with a particular local port.
Select
STUN (RFC 3489)
to use a STUN server for Signaling NAT Traversal. Enter the
IP Address or the domain name of the STUN server to be used.
C) Relay Proxy
Relay proxy
is a proprietary NAT traversal technology. Please consult your service
provider for more information.
Currently, the following 3 kinds of packaging mechanism are supported:
3.4.5.3 Media NAT Traversal
Similar to Signaling NAT Traversal, this feature allows media packets (RTP) to be
routed properly in various network environments.
A
）
NONE
Select
None
to disable this feature.
B) Port Transparent/DMZ
Port Transparent
refers that put network port of the
LAN
into computer or inside of
the
LAN
. The actual servers allow external users enjoy the servers of internal
server(
FTP
、
HTTP
、
Telnet).
It contains Gateway address and the responding to the
server's address. Gateway is communications equipment that connect two different
networks, response to the server is standard service equipment that perform ECHO
protocol.
C
）
STUN(RFC3489)
STUN
(
Simple Traversal of UDP (User Datagram Protocol) through NATS (Network
Address Translators)
) is a network protocol allowing a client behind a NAT (or
multiple NATS) to find out its public address, the type of NAT it is behind and the
internet-side port associated by the NAT with a particular local port.
Select
STUN (RFC 3489)
to use a STUN server for Signaling NAT Traversal. Enter the
IP Address or the domain name of the STUN server to be used.
