Linksys SPA2102-R3 User Manual page 14

Overcoming firewall for ADSL modem or ADSL router
If you have an ADSL router, there may be firewall options built in that may block certain network traffic and may
interfere with the Digital Voice Global service. If you experience problems with your Digital Voice Global service, and
are connecting through a firewall, please ensure that the following UDP ports are allowed to and from the IAD
Digital Voice Global IAD Internet ports:
• SIP ports 5060 through 5061 using UDP protocol
• TFTP port 69 using UDP protocol
• DNS port 53 using UDP protocol
• RTP ports 16384 through 32767 using UDP protocol
Since firewalls may be designed differently, please consult the ADSL modem or router user manual for further
information on firewall settings.
For ADSL modem or ADSL router with NAT
The NAT (Network Address Translation) function on your router may block needed communication ports, which
will interfere with the Digital Voice Global. You may need to direct certain ports to be accessible to our network
in order to use Digital Voice Global.
Each router manufacturer has a different process for Port Forwarding (also called Port Opening). In each case,
you must always specify two port ranges to be opened:
• 5060 - 5061 (UDP)
• 16384-32767 (UDP)
These ports should be forwarded to the IP address of your Digital Voice Global. Please refer to your router
manual for Port Forwarding configuration instructions.
Setting Up Your Digital Voice Global Connection
13