ArtDio IPC 1000 Series - Manual (Page 55)

ARTDio IPP 1000 Series
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7. Special Applications
7-1 Using NAT Via Private IP
IPP can be configured as a private IP address and inter-connected with other IPH/IPE units.
Carrier
IP Sharing
LAN side
IP
IP Sharing
Ethernet
IPP
(Private IP)
LAN side
(Public IP)
WAN side
IPH
(Private IP)
Carrier
WAN side
(Public IP)
Phone Line
Phone Line
PC PC
(Private IP) (Private IP)
Architecture with IP sharing device
7-1.1 Virtual Servers on the IP sharing device
For the most part, IP sharing devices act as clients, not as servers. However, if you want to
install servers such as web, mail or devices like the IPP unit on the LAN side, you must configure
such devices as virtual servers with the IP sharing device. The IPP unit behaves as a server, so you
must configure the IP sharing device to treat it as a virtual server.
Every server uses a particular port (e.g. TCP port 80 for Web servers and TCP port 21 for FTP
servers). The IPP unit uses UDP port 2000. The method used to configure a virtual server is to map
the server port to the private IP that the virtual server is assigned. Thus is so that incoming packets
that are meant to reach a particular server port are correctly forwarded to the server’s assigned
private IP address on the LAN side of your network. For example, if you want to install a web
server on the LAN side of your network using a private IP address (e.g.192.168.1.1), you must
configure the correct port mapping on the IP sharing device so that it is able to forward all packets
that are intended for destination port TCP 80 on the server’s assigned private IP address
(e.g.192.168.1.1:80). The mapping should be as follows: TCP port 80 <-> 192.168.1.1.