Chapter 11 Network Address Translation (NAT)
AMG1302/AMG1202-TSeries User’s Guide
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11.3 The Port Forwarding Screen
Use this screen to forward incoming service requests to the server(s) on your local network.
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.
The most often used port numbers and services are shown in
. Please refer
to RFC 1700 for further information about port numbers.
Note: Many residential broadband ISP accounts do not allow you to run any server
processes (such as a Web or FTP server) from your location. Your ISP may
periodically check for servers and may suspend your account if it discovers any
active services at your location. If you are unsure, refer to your ISP.
Default Server IP Address
In addition to the servers for specified services, NAT supports a default server IP address. A default
server receives packets from ports that are not specified in this screen.
Note: If you do not assign a
Default Server
IP address, the AMG1302/AMG1202-TSeries
discards all packets received for ports that are not specified here or in the remote
management setup.
Configuring Servers Behind Port Forwarding (Example)
Let's say you want to assign ports 21-25 to one FTP, Telnet and SMTP server (
A
in the example),
port 80 to another (
B
in the example) and assign a default server IP address of 192.168.1.35 to a
third (
C
in the example). You assign the LAN IP addresses and the ISP assigns the WAN IP address.
The NAT network appears as a single host on the Internet.
Figure 67
Multiple Servers Behind NAT Example
11.3.1 Configuring the Port Forwarding Screen
Click
Network Setting > NAT > Port Forwarding
to open the following screen.
A=192.168.1.33
D=192.168.1.36
C=192.168.1.35
B=192.168.1.34
WAN
LAN
192.168.1.1
IP Address assigned by ISP
Summary of Contents for AMG1202-T series
Page 4: ...Contents Overview AMG1302 AMG1202 TSeries User s Guide 4 ...
Page 13: ...13 PART I User s Guide ...
Page 14: ...14 ...
Page 20: ...Chapter 1 Introduction AMG1302 AMG1202 TSeries User s Guide 20 ...
Page 28: ...Chapter 2 Introducing the Web Configurator AMG1302 AMG1202 TSeries User s Guide 28 ...
Page 61: ...Chapter 4 Tutorials AMG1302 AMG1202 TSeries User s Guide 61 Tutorial Advanced QoS Class Setup ...
Page 64: ...Chapter 4 Tutorials AMG1302 AMG1202 TSeries User s Guide 64 ...
Page 65: ...65 PART II Technical Reference ...
Page 66: ...66 ...
Page 72: ...Chapter 5 Connection Status and System Info Screens AMG1302 AMG1202 TSeries User s Guide 72 ...
Page 120: ...Chapter 7 Wireless LAN AMG1302 AMG1202 TSeries User s Guide 120 ...
Page 150: ...Chapter 10 Quality of Service QoS AMG1302 AMG1202 TSeries User s Guide 150 ...
Page 160: ...Chapter 11 Network Address Translation NAT AMG1302 AMG1202 TSeries User s Guide 160 ...
Page 172: ...Chapter 14 Filters AMG1302 AMG1202 TSeries User s Guide 172 ...
Page 194: ...Chapter 16 Parental Control AMG1302 AMG1202 TSeries User s Guide 194 ...
Page 200: ...Chapter 17 Certificate AMG1302 AMG1202 TSeries User s Guide 200 ...
Page 206: ...Chapter 19 Traffic Status AMG1302 AMG1202 TSeries User s Guide 206 ...
Page 208: ...Chapter 20 User Account AMG1302 AMG1202 TSeries User s Guide 208 ...
Page 212: ...Chapter 21 TR 069 Client AMG1302 AMG1202 TSeries User s Guide 212 ...
Page 216: ...Chapter 22 System Settings AMG1302 AMG1202 TSeries User s Guide 216 ...
Page 222: ...Chapter 24 Backup Restore AMG1302 AMG1202 TSeries User s Guide 222 ...
Page 234: ...Chapter 25 Remote Management AMG1302 AMG1202 TSeries User s Guide 234 ...
Page 238: ...Chapter 26 Diagnostic AMG1302 AMG1202 TSeries User s Guide 238 ...
Page 244: ...Chapter 27 Troubleshooting AMG1302 AMG1202 TSeries User s Guide 244 ...
Page 294: ...Appendix D Wireless LANs AMG1302 AMG1202 TSeries User s Guide 294 ...
Page 304: ...Appendix E IPv6 AMG1302 AMG1202 TSeries User s Guide 304 ...
Page 320: ...Index AMG1302 AMG1202 TSeries User s Guide 320 ...