Panasonic KX-TDA5450, Installation Manual

Page: 78 / 86

A.1 Important Notice for Subscription and
Installation
A.1.1 Firewall Requirements
If the VoIP network contains a firewall, you must configure the firewall to allow VoIP packets to pass through
certain ports of the ports listed below without being blocked by filtering. The ports for which you need to
configure the firewall may vary depending on the network conditions.
For more information, consult your network administrator.
[IP Packets to SIP-GW4 Card]
Port TCP/UDP Default Port No.
SIP Client Port UDP 5060
STUN Client Port UDP 3478
RTP/RTCP Port UDP 5004–5103
DNS Client Port UDP 53
[IP Packets from SIP-GW4 Card]
Port TCP/UDP Default Port No.
Proxy Server Port UDP 5060
Registrar Server Port UDP 5060
STUN Server Port UDP 3478
DNS Server Port UDP 53
Router Requirements
•
Port Forwarding:
It may be necessary to set the NAT router so that it forwards the incoming packets to the IP address of the
SIP-GW4 card if all of the following conditions are met:
–
the PBX uses a STUN server;
–
a SIP-GW4 card is located under a NAT router;
–
incoming packets are routed to a SIP Client port or RTP/RTCP port indicated in the [IP Packets to
SIP-GW4 Card] table above.
•
SIP-NAT Feature:
When a SIP-GW4 card is located under a NAT router that supports the SIP-NAT feature
*1
, it is
recommended to disable this feature.
*1
When NAT is enabled, the router translates the IP address stored in the IP header and the port number stored in the UDP header.
When SIP-NAT is enabled, the router also translates the IP address and port number stored in SIP messages.
78 Installation Manual Document Version 2008-10
A.1.1 Firewall Requirements