System information

WellGate 3804 User Manual
3.3 Behind IP-Sharing
IP Sharing function
The function is for user whose network environment is behind IP Sharing device. It is said
WellGate 3804 is connected to the IP Sharing device.
An example such as ADSL network is in the following.
ATU-R ADSL Modem
WAN ①
IP Sharing device
LAN③ LAN ②
WellGate 3804 ④ PC
① The WAN IP Address obtained from ADSL has two kinds of methods.
One is fixed IP Address, while user applies for one or more fixed IP Addresses.
Another is dynamic IP Address while user applies for dial-up connection way.
② The LAN IP Address of User’s PC can be set as DHCP client in order to gain an valid
one.
③ Anther IP Address for WellGate 3804 must be set as an fixed one in order for that IP
Sharing device pass forwarding the relevant information from WAN to LAN. Besides, a
valid IP Address which meets the IP Sharing device (LAN site) is the element.
④ WellGate 3804 must enable the IP Sharing function for the fixed / dynamic WAN IP
Address.
Fixed IP Address – usr/config$ ifaddr –ipsharing 1 210.11.22.33
Dynamic IP Address –usr/config$ ifaddr –ipsharing 1
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Please be noted
With Dynamic WAN IP Address, an valid Gatekeeper for WellGate 3804 to get register on
it is a must. In other word, it is not workable in Peer-to-Peer mode while dynamic WAN IP
Address.
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 the WellGate 3804 is assigned a virtual fixed IP
Address such as 192.168.1.5, IP Sharing device must forward the VoIP messages to
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