Port Forwarding; Example: How To Configure Port Forwarding On The Eircom Netopia Modem Router Cayman 3346 - Eircom Advantage Installation Manual

Advantage IP Executive Installation Guide
4.4

Port Forwarding

In the Office location, incoming VoIP calls to the Advantage system are routed from the Internet through
a gateway modem/router on the LAN to the Advantage System. This modem/router must be configured
to direct this traffic to the local IP address of the Advantage system on the LAN.
Traffic on the following three ports must be sent to the local IP address of the Advantage system:
Port 5075 for TCP packets (allows registration and signaling)
Port 50000 for UDP packets (for speech)
Port 50001 for UDP packets (for speech)
4.4.1 Example: How to Configure Port Forwarding on the eircom Netopia Modem Router
Cayman 3346
This section describes how to configure port forwarding for Voice over IP traffic on the eircom Netopia
Modem Router Cayman 3346.
Voice traffic coming from the Internet to the eircom Advantage system in the Office location is routed
through the Netopia ADSL Modem router as shown in the diagram below. This device implements a
firewall to protect the internal LAN from intrusion from the Internet. The firewall must be opened up to
allow voice traffic from the Internet to pass through and it must be configured to forward this voice traffic
to the internal IP address of the Advantage system.
Office
LAN
PC
Netopia ADSL
eircom Modem/ Router
Advantage
18
Internet
Home
PC
ADSL Modem
eircom
Advantage IP
Executive