Fixed IP Address:
usr/config$ ifaddr
Note: With Dynamic WAN IP Address, when the WAN IP is changed, we need to change the external IP of SP5001/S using above command.
5.IP Sharing device must have a function to do IP/Port mapping. Some is named as DMZ; some is named as virtual server. The VoIP messages from WAN have to completely pass forward to the LAN. It is said if SP5001/S is assigned a virtual fixed IP Address such as 192.168.1.5, IP Sharing device must forward the VoIP messages to 192.168.1.5.
Please see the following for example:
>Advanced setting > NAT setting > DMZ Host setting
DMZ Host setting
Activate
DMZ
DMZ Host IP :
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