Bedienungsanleitung Netgear wnr2000 (Seite 81 von 140) (Englisch)

430975

Zoom out

Zoom in

Vorherige Seite

1/140

Nächste Seite

NETGEAR Wireless-N Router WNR2000 User Manual

Fine-Tuning Your Network 5-5

v1.3, February 2009

How Port Forwarding Changes the Communication Process

In both of the preceding examples, your computer initiates an application session with a server

computer on the Internet. However, you might need to allow a client computer on the Internet to

initiate a connection to a server computer on your network. Normally, your router ignores any

inbound traffic that is not a response to your own outbound traffic. You can configure exceptions

to this default rule by using the port forwarding feature.

A typical application of port forwarding can be shown by reversing the client-server relationship

from our previous Web server example. In this case, a remote computer’s browser needs to access

a Web server running on a computer in your local network. Using port forwarding, you can tell the

router, “When you receive incoming traffic on port 80 (the standard port number for a Web server

process), forward it to the local computer at 192.168.1.123.” The following sequence shows the

effects of the port forwarding rule you have defined:

1. The user of a remote computer opens Internet Explorer and requests a Web page from

www.example.com, which resolves to the public IP address of your router. The remote

computer composes a Web page request message with the following destination information:

• The destination address is the IP address of www.example.com, which is the address of

your router.

• The destination port number is 80, the standard port number for a Web server process.

The remote computer then sends this request message through the Internet to your router.

2. Your router receives the request message and looks in its rules table for any rules covering the

disposition of incoming port 80 traffic. Your port forwarding rule specifies that incoming port

80 traffic should be forwarded to local IP address 192.168.1.123. Therefore, your router

modifies the destination information in the request message:

The destination address is replaced with 192.168.1.123.

Your router then sends this request message to your local network.

3. Your Web server at 192.168.1.123 receives the request and composes a return message with

the requested Web page data. Your Web server then sends this reply message to your router.

4. Your router performs Network Address Translation (NAT) on the source IP address, and sends

this request message through the Internet to the remote computer, which displays the Web

page from www.example.com.

To configure port forwarding, you need to know which inbound ports the application needs. You

usually can determine this information by contacting the publisher of the application or user

groups or newsgroups.

Missbrauch melden von Frage und/oder Antwort

Libble nimmt den Missbrauch seiner Dienste sehr ernst. Wir setzen uns dafür ein, derartige Missbrauchsfälle gemäß den Gesetzen Ihres Heimatlandes zu behandeln. Wenn Sie eine Meldung übermitteln, überprüfen wir Ihre Informationen und ergreifen entsprechende Maßnahmen. Wir melden uns nur dann wieder bei Ihnen, wenn wir weitere Einzelheiten wissen müssen oder weitere Informationen für Sie haben.

Netgear wnr2000 Seite 81

Brauchen Sie Hilfe? Stellen Sie Ihre Frage.

Missbrauch melden von Frage und/oder Antwort

Art des Missbrauchs:

Forenregeln

Neu registrieren

Andere Handbücher von Netgear wnr2000

Das Handbuch wird per E-Mail gesendet. Überprüfen Sie ihre E-Mail.

Ihre Frage wurde zu diesem Forum hinzugefügt

Info