I SERIES V oIP USER GUIDE
www.teledexeurope.com
17
Network (LAN). An external attacker only has
access to equipment in the DMZ, rather than any
other part of the network. The name is derived
from the term “demilitarized zone,” an area
between nation states in which military action is
not permitted.
3.5.3 STUN CONFIGURATION
This page is used to set the private SIP server,
STUN server, and back up SIP server information.
STUN SERVER SETTINGS
STUN means Simple Traversal of UDP through
NATs (Network Address Translation). It is a
protocol used for assisting devices behind a NAT
firewall or router with their packet routing. Used
to penetrate through NAT, start by configuring
IP and port of STUN server (default is 3478) and
Enabling SIP Stun. This should enable routing
of SIP UDP packets from the phone through a
NAT firewall. STUN only supports three NAT
methodologies: FULL CONE, restricted, and port
restricted.
STUN Server Addr:
Configures the STUN server
address.
STUN Server Port:
Configures the STUN server
port. The default is 3478.
STUN Effect Time:
STUN detects the NAT type
circle; unit: minute.
Local SIP Port:
The SIP port of this phone.
Load:
Load the choices of the SIP line.
Use STUN:
The STUN setting that allows (enables)
or forbids use.
3.5.4 NET SERVICE
HTTP Port:
Configures the Hyper Text Transfer
Port; the default HTTP port is 80. User may
change this port to enhance the system’s security
(the number must be between 1024 and 65000).
For example, if you were to change to port 34687,
then when this port is changed, you would use
a generic IP address of format http://xxx.xxx.xxx.
xxx:34687/ to reconnect.
Telnet Port:
Configures the Telnet transfer port;
the default is 23.
RTP Initial Port:
Real-time Transport Protocol
initial port. RTP is the standard packet format for
delivering audio and video over IP networks.
RTP Port Quantity:
Maximum number of
unpriveliged UDP ports to be used for delivering
the RTP packets; the default is 200.
Note:
Settings on this page won’t take effect
unless you save and reboot the device.
If you need to change the Telnet port or HTTP
port, use a port greater than 1024, because ports
under 1024 are reserved ports.
3.5.5 FIREWALL CONFIGURATION
Firewall Settings Page:
User may set up a firewall to
prevent unauthorized Internet users from accessing
private networks connected to the Internet (input
rule), or prevent unauthorized private network
devices from accessing the Internet.
Access List Supports Two Type Limits:
The
input_access limit or output_access limit. Each
type supports 10 items maximum.
