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Chapter 11 Network Address Translation (NAT)
P-661HNU-Fx User’s Guide
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before forwarding the packet to the WAN side. When the response comes back,
NAT translates the destination address (the inside global address) back to the
inside local address before forwarding it to the original inside host.
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.
Finding Out More
for advanced technical information on NAT.
11.2 The Port Forwarding Screen
Use the Port Forwarding 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.
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
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Страница 8: ...Safety Warnings P 661HNU Fx User s Guide 8...
Страница 10: ...Contents Overview P 661HNU Fx User s Guide 10...
Страница 18: ...Table of Contents P 661HNU Fx User s Guide 18 Appendix G Legal Information 393 Index 1...
Страница 19: ...19 PART I User s Guide...
Страница 20: ...20...
Страница 28: ...Chapter 1 Introduction P 661HNU Fx User s Guide 28...
Страница 36: ...Chapter 2 Introducing the Web Configurator P 661HNU Fx User s Guide 36...
Страница 79: ...79 PART II Technical Reference...
Страница 80: ...80...
Страница 86: ...Chapter 4 Connection Status and System Info Screens P 661HNU Fx User s Guide 86...
Страница 140: ...Chapter 6 Wireless P 661HNU Fx User s Guide 140...
Страница 172: ...Chapter 8 Routing P 661HNU Fx User s Guide 172...
Страница 176: ...Chapter 9 DNS Route P 661HNU Fx User s Guide 176...
Страница 260: ...Chapter 24 Backup Restore P 661HNU Fx User s Guide 260...
Страница 281: ...Chapter 27 Product Specifications P 661HNU Fx User s Guide 281...
Страница 282: ...Chapter 27 Product Specifications P 661HNU Fx User s Guide 282...
Страница 334: ...Appendix C Pop up Windows Java Script and Java Permissions P 661HNU Fx User s Guide 334...
Страница 358: ...Appendix D Wireless LANs P 661HNU Fx User s Guide 358...
Страница 392: ...Appendix F Open Software Announcements P 661HNU Fx User s Guide 392...
Страница 403: ...Index P 661HNU Fx User s Guide 403...
Страница 404: ...Index P 661HNU Fx User s Guide 404...