One-to-One NAT Configuration Example

This example assumes that you have a SonicWALL running in the NAT-enabled mode, with IP addresses on the LAN in the range 192.168.1.1 - 192.168.1.254, and a WAN IP address of 208.1.2.2. Also, you own the IP addresses in the range 208.1.2.1 - 208.1.2.6.

Alert If you have only one IP address from your ISP, you cannot use One-to-One NAT.

You have three web servers on the LAN with the IP addresses of 192.168.1.10, 192.168.1.11, and 192.168.1.12. Each of the servers must have a default gateway pointing to 192.168.1.1, the SonicWALL LAN IP address.

You also have three additional IP addresses from your ISP, 208.1.2.4, 208.1.2.5, and 208.1.2.6, that you want to use for three additional web servers. Use the following steps to configure One-to- One NAT:

1.Log into the Management Interface, and click Advanced. Then click the One-to-One NAT tab.

2.Select Enable One-to-One NAT and click Update.

3.Type in the IP address, 192.168.1.10, in the Private Range Begin field.

4.Type in the IP address, 208.1.2.4, in the Public Range Begin field.

5.Type in 3 in the Range length field.

Tip You can configure the IP addresses individually, but it is easier to configure them in a range. However, the IP addresses on both the private and public sides must be consecutive to configure a range of addresses.

6.Click Update.

7.Click Access, then the Rules tab.

8.Click Add New Rule and configure the following settings:

•Allow

•Service - HTTP

•Source - WAN

•Destination - LAN 192.168.1.10 - 192.168.1.12

•Apply this rule - always

9. Click Update and restart the SonicWALL.

The server configurations take effect after the SonicWALL restarts and the configuration is updated. Requests for http://208.1.2.4 are answered by the server at 192.168.1.10. Requests for http://208.1.2.5 are answered by the server at 192.168.1.11, and requests for http://208.1.2.6 are answered by the server at 192.168.1.12. From the LAN, the servers can only be accessed using the private IP addresses (192.168.1.x), not the public IP addresses or domain names. For example, from the LAN, you must use URLs like http://192.168.1.10 to reach the web servers. An IP address, such as 192.168.1.10, on the LAN cannot be used in both public LAN server configurations and in public LAN server One-to-One NAT configurations.

Advanced Features Page 161

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SonicWALL Internet Security Appliances One-to-One NAT Configuration Example, Select Enable One-to-One NAT and click Update
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Internet Security Appliances specifications

SonicWALL Internet Security Appliances are pivotal solutions aimed at safeguarding networks from an ever-evolving array of cyber threats. Designed for small to medium-sized businesses, as well as enterprises, these appliances deliver robust security and high-performance capabilities.

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In summary, SonicWALL Internet Security Appliances combine essential features like Unified Threat Management, Application Control, and advanced threat protection technologies into a cohesive security solution. Their scalability, centralized management capabilities, and user-friendly interfaces make them an excellent choice for businesses aiming to strengthen their cyber defenses in a complex digital landscape.
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