Netgear WNDR4000 User Manual download pdf (Page 43)

Chapter 4. Content Filtering Settings | 43

N750 Wireless Dual Band Gigabit Router WNDR4000 User Manual

- Days specifies which day of the week to send the log. This is relevant when the log is

sent weekly.

- Time specifies the time of day to send the log. This is relevant when the log is sent

daily or weekly.

Note: If the Weekly, Daily, or Hourly option is selected and the log fills up

before the specified period, the log is automatically emailed to the

specified email address. After the log is sent, it is cleared from the

wireless router’s memory. If the wireless router cannot email the log

file, the log buffer might fill up. In this case, the wireless router

overwrites the log and discards its contents.

Port Forwarding

Because the wireless router uses Network Address Translation (NAT), your network presents

only one IP address to the Internet, and outside users cannot directly address any of your

local computers. However, with port forwarding you can make a local server (for example, a

Web server or game server) visible and available to the Internet.

Note: Some residential broadband ISP accounts do not let you run server

processes (such as a Web or FTP server) from your location. Your

ISP might periodically check for servers and suspend your account if

it discovers any active services at your location. If you are unsure,

refer to the acceptable use policy of your ISP.

Port forwarding tells the wireless router to direct inbound traffic for a particular service to one

local server based on the destination port number. Port forwarding opens holes in your

firewall. Enable only those ports that are necessary for your network.

Before starting, you need to determine which type of service, application, or game you will

provide, and the local IP address of the computer that will provide the service. Be sure the

computer’s IP address never changes.

The following are some considerations for port forwarding:

• If your external IP address is assigned dynamically by your ISP, the IP address might

change periodically as the DHCP lease expires. Consider using the Dynamic DNS screen

described in

Dynamic DNS on page 70 so that external users can always find your

network.

• If the IP address of the local server computer is assigned by DHCP, it might change when

the computer is rebooted. To avoid this, use the Reserved IP address feature in the LAN

Setup screen to keep the computer’s IP address constant.

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Netgear WNDR4000 User Manual Page 43