3300IP VoIP Phone | User Manual
www.CetisGroup.com
8
DMZ Config
：
3.5.3 STUN
This page is used to set the private sip server, stun
server, and back up sip server information.
STUN Server setting: SIP STUN is used to realize SIP
penetrates through NAT, when the phone configures IP
and port of STUN server (default is 3478) and select
Enable SIP Stun, common SIP server can be used to
realize the phone to penetrate through NAT. In this
way, If you have common SIP proxy and STUN server
parked public network, it is all right, but STUN only
support three NAT ways: FULL CONE, restricted, port
restricted;
STUN Server Addr:
configure stun server address;
STUN Server Port:
configure stun server port default
3478
STUN Effect Time:
stun detect NAT type circle, unit:
minute.
Local SIP Port:
The SIP port of this phone
Load
：
Load the choices of SIP line.
Use Stun:
Stun. Set the Stun that allows/forbids use
user setting.
3.5.4 Net Service
HTTP Port:
configure HTTP transfer port; default is 80.
User may change this port to enhance system’s
security. When this port is changed, please use
http://xxx.xxx.xxx.xxx:xxxx/ to reconnect.
Telnet Port:
configure telnet transfer port, default is 23.
RTP Initial Port
: RTP initial port.
RTP Port Quantity:
Maximum RTP port quantity, default
is 200
Notice:
Settings in this page won’t take effect unless save and
reboot the device.
If you need to change telnet port or HTTP port, please
use the port greater than 1024, because ports under
1024 is system remain ports.
HTTP service if HTTP is set to 0.
3.5.5 Firewall settings
Firewall setting page
：
User may set up firewall to
prevent unauthorized Internet users from accessing
private networks connected to the Internet (input rule),
or prevent unauthorized private network devices to
access the internet.
Access list support two type limits: input_access limit or
output_access limit. Each type supports 10 items
maximum.
3300IP firewall filter is base WAN port. So the source
address or input destination address should be WAN
port IP address.
