DSL-504 ADSL Router User’s Guide

Please note that in the above diagram, the Gateway IP address settings for the local PC’s needs to be set to 192.168.0.1, the LAN IP address of the router.

NAT manipulates the IP addresses in packet headers on a one-to-one basis. An outgoing data packet (a packet originating from a computer on the local LAN and destined for a computer outside the private network) will have its IP address translated as shown below.

In the Outgoing Data Packet above, the Source IP address is the IP address that is translated by NAT. The Destination IP Address is the IP address of a computer outside the private network, on the Internet for example. And the Data portion of the packet is the information payload carried by the packet, for instance a request to view a web page.

The router logs the changes made to the IP header in its NAT table. The NAT table enables the router to send replies back to the local computer as shown below.

In the Inbound Data Packet above, the Destination IP Address is the IP address that is translated by NAT. The Source IP Address is the IP address of a computer outside the private network. And the Data portion of the packet is the information payload carried by the packet, in this case, web page contents.

Setting Local IP Addresses

When implementing NAT and thus creating a private network that is isolated from the Internet, you can assign any IP addresses to host computers without problems. However, the Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of IP Addresses specifically for private networks:

Class

Beginning Address

Ending Address

A

10.0.0.0

10.255.255.255

B

172.16.0.0

172.31.255.255

C

192.168.0.0

192.168.255.255

It is recommended that you choose local IP addresses for use with NAT from the private network IP addresses in the above list. For more information on address assignment, refer to RFC 1597, Address Allocation for Private Internets and RFC 1466, Guidelines for Management of IP Address Space.

Port Redirection

17

Page 22 Page 24
Page 23
Image 23
D-Link DSL-504 manual Setting Local IP Addresses, Port Redirection
Page 22 Page 24

DSL-504 specifications

The D-Link DSL-504 is a versatile and reliable ADSL modem/router that has been designed to meet the needs of both home and small office users. With its compact size and user-friendly interface, this device has garnered popularity among those who require stable internet connectivity without the complexity of managing multiple devices.

One of the main features of the D-Link DSL-504 is its ADSL compatibility, which enables users to take full advantage of high-speed internet connections offered by ADSL service providers. This modem/router supports a wide range of ADSL standards, including ADSL2 and ADSL2+, providing users with robust performance and efficient bandwidth utilization. This means users can enjoy faster download speeds and improved upload rates, making it ideal for activities like streaming, online gaming, and video conferencing.

The D-Link DSL-504 is equipped with several Ethernet ports that allow for wired connections to multiple devices, ensuring that users have the ability to connect their PCs, laptops, and gaming consoles directly to the network for optimal performance. Additionally, the built-in wireless capability offers Wi-Fi connectivity, allowing users to connect their smartphones, tablets, and other devices without the need for cumbersome cables. The wireless transmission uses the 802.11g standard, providing speeds of up to 54 Mbps.

Security is a significant concern for home and business users, and the D-Link DSL-504 addresses this with a variety of security features. It supports encryption standards like WEP and WPA/WPA2, ensuring that wireless connections are secure from unauthorized access. The device also incorporates a built-in firewall, providing an additional layer of protection against external threats.

The DSL-504 offers easy setup and management through a web-based interface, allowing users to customize their network settings effortlessly. The intuitive configuration wizard guides users through the process, making it accessible even for those with minimal technical expertise.

In summary, the D-Link DSL-504 is a reliable ADSL modem/router that combines speed, security, and ease of use. Its compatibility with various ADSL standards, multiple Ethernet ports, built-in wireless functionality, and strong security features make it a compelling choice for anyone looking to establish a stable internet connection. Whether for home use or small office operations, the DSL-504 provides the necessary tools to enhance connectivity and productivity.
Top Page Image Contents