Chapter 7 NAT
PMG5318-B20A User’s Guide
73
NAT Application
The following figure illustrates a possible NAT application, where three inside LANs (logical LANs
using IP alias) behind the GPON Device can communicate with three distinct WAN networks.
Figure 39
NAT Application With IP Alias
7.2 Port Forwarding
A port forwarding set is a list of inside (behind NAT on the LAN) servers, for example, web or FTP,
that you can make visible to the outside world even though NAT makes your whole inside network
appear as a single computer to the outside world.
You may enter a single port number or a range of port numbers to be forwarded, and the local IP
address of the desired server. The port number identifies a service; for example, web service is on
port 80 and FTP on port 21. In some cases, such as for unknown services or where one server can
support more than one service (for example both FTP and web service), it might be better to
specify a range of port numbers. You can allocate a server IP address that corresponds to a port or
a range of ports.
Internet
Corporation B
NAT Server
192.168.3.1
LAN3: 192.168.3.X
Network Server
“R&D”=192.168.3.1
WAN Addresses: LAN Addresses: (Default IPs)
IGA 1
--------------->
192.168.1.1
IGA 2
--------------->
192.168.2.1
IGA 3
--------------->
192.168.3.1
NAT Server
192.168.2.1
LAN2: 192.168.2.X
Network Server
“Sales”=192.168.2.1
Server in
R&D Network
=IP3 (IGA 3)
NAT Server
192.168.1.1
LAN2: 192.168.1.X
Network Server
“Admin=192.168.1.1
Corporation A
Server in
Sales Network
=IP2 (IGA 2)
Server in
Admin Network
=IP1 (IGA 1)
Содержание PMG5318-B20A
Страница 8: ...Table of Contents PMG5318 B20A User s Guide 8 ...
Страница 14: ...Chapter 1 Introduction PMG5318 B20A User s Guide 14 ...
Страница 20: ...Chapter 2 The Web Configurator PMG5318 B20A User s Guide 20 ...
Страница 44: ...Chapter 5 LAN PMG5318 B20A User s Guide 44 ...
Страница 70: ...Chapter 6 Wireless LAN PMG5318 B20A User s Guide 70 ...
Страница 80: ...Chapter 8 Quality of Service QoS PMG5318 B20A User s Guide 80 ...
Страница 96: ...Chapter 10 Phone Usage PMG5318 B20A User s Guide 96 ...
Страница 102: ...Chapter 11 USB Services PMG5318 B20A User s Guide 102 ...
Страница 117: ...Chapter 12 Remote Management PMG5318 B20A User s Guide 117 ...
Страница 118: ...Chapter 12 Remote Management PMG5318 B20A User s Guide 118 ...
Страница 122: ...Chapter 13 Static Route PMG5318 B20A User s Guide 122 ...
Страница 126: ...Chapter 14 Dynamic DNS PMG5318 B20A User s Guide 126 ...
Страница 144: ...Chapter 17 Logs PMG5318 B20A User s Guide 144 ...
Страница 150: ...Chapter 19 Diagnostic PMG5318 B20A User s Guide 150 ...
Страница 164: ...Appendix B Legal Information PMG5318 B20A User s Guide 164 ...