Chapter 9 Network Address Translation (NAT)
P-660HWP-D1 User’s Guide
140
9.5 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.
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.
9.5.1 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.
"
If you do not assign a Default Server IP address, the P-660HWP-D1 discards all
packets received for ports that are not specified here or in the remote
management setup.
9.5.2 Port Forwarding: Services and Port Numbers
Use the
Port Forwarding
screen to forward incoming service requests to the server(s) on your
local network.
The most often used port numbers are shown in the following table. Please refer to RFC 1700
for further information about port numbers.
Table 50
Services and Port Numbers
SERVICES
PORT NUMBER
ECHO
7
FTP (File Transfer Protocol)
21
SMTP (Simple Mail Transfer Protocol)
25
DNS (Domain Name System)
53
Finger
79
HTTP (Hyper Text Transfer protocol or WWW, Web)
80
POP3 (Post Office Protocol)
110
NNTP (Network News Transport Protocol)
119
SNMP (Simple Network Management Protocol)
161
Содержание P-660HWP-D1
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Страница 8: ...Safety Warnings P 660HWP D1 User s Guide 8...
Страница 10: ...Contents Overview P 660HWP D1 User s Guide 10...
Страница 20: ...Table of Contents P 660HWP D1 User s Guide 20...
Страница 26: ...List of Figures P 660HWP D1 User s Guide 26...
Страница 31: ...31 PART I Introduction Introducing the P 660HWP D1 33 Introducing the Web Configurator 41...
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Страница 39: ...Chapter 1 Introducing the P 660HWP D1 P 660HWP D1 User s Guide 39 Figure 7 P 660HWP D1 with ISDN...
Страница 40: ...Chapter 1 Introducing the P 660HWP D1 P 660HWP D1 User s Guide 40...
Страница 54: ...Chapter 2 Introducing the Web Configurator P 660HWP D1 User s Guide 54 Figure 19 System General...
Страница 55: ...55 PART II Wizards Wizard Setup for Internet Wireless Access 57 Bandwidth Management Wizard 69...
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Страница 90: ...Chapter 5 WAN Setup P 660HWP D1 User s Guide 90...
Страница 147: ...147 PART IV Security Firewalls 149 Firewall Configuration 161 Content Filtering 183 Certificates 187...
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Страница 168: ...Chapter 11 Firewall Configuration P 660HWP D1 User s Guide 168 Figure 93 Firewall Edit Rule...
Страница 182: ...Chapter 11 Firewall Configuration P 660HWP D1 User s Guide 182...
Страница 186: ...Chapter 12 Content Filtering P 660HWP D1 User s Guide 186...
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Страница 214: ...Chapter 14 Static Route P 660HWP D1 User s Guide 214...
Страница 230: ...Chapter 16 Dynamic DNS Setup P 660HWP D1 User s Guide 230...
Страница 242: ...Chapter 17 Remote Management Configuration P 660HWP D1 User s Guide 242...
Страница 254: ...Chapter 18 Universal Plug and Play UPnP P 660HWP D1 User s Guide 254...
Страница 255: ...255 PART VI Maintenance and Troubleshooting System 257 Logs 263 Tools 281 Diagnostic 287 Troubleshooting 289...
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Страница 262: ...Chapter 19 System P 660HWP D1 User s Guide 262...
Страница 280: ...Chapter 20 Logs P 660HWP D1 User s Guide 280...
Страница 286: ...Chapter 21 Tools P 660HWP D1 User s Guide 286...
Страница 296: ...296...
Страница 340: ...Appendix D IP Subnetting P 660HWP D1 User s Guide 340...
Страница 344: ...Appendix E Command Interpreter P 660HWP D1 User s Guide 344...
Страница 360: ...Appendix H Legal Information P 660HWP D1 User s Guide 360...
Страница 366: ...Appendix I Customer Support P 660HWP D1 User s Guide 366...
Страница 374: ...Index P 660HWP D1 User s Guide 374...