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Configure OPT Port

 

 

 

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  SONICWALL
Configure OPT (Optional Port) on Sonicwall Router

 

SonicWALL's DMZ Port (also known as an Optional Port) is a separate network interface on a SonicWALL TZ-170, TZ-180 and TZ-190 firewall that can be setup as a separate network port for security purposes.  A common use for this port is to use it as a simple DMZ port to protect servers from general network users.

 

Configuring the OPT Interface

 

You can configure the DMZ interface in either Transparent Mode or NAT Mode:

 

Transparent Mode enables the SonicWALL security appliance to bridge the OPT subnet onto the WAN interface. It requires valid IP addresses for all computers connected to the OPT interface on your network, but allows remote access to authenticated users. You can use the OPT interface in Transparent mode for public servers and devices with static IP addresses you want visible outside your SonicWALL security appliance-protected network.

 

NAT Mode translates the private IP addresses of devices connected to the OPT interface to a single, static IP address.

 

Configuring Transparent Mode

 

Transparent Mode requires valid IP addresses for all computers on your network, and allows remote access to authenticated users.

To enable Transparent Mode:

 

  1. Click the Edit Icon in the line for the OPT interface in the Interfaces table. The OPT Properties window displays.

 

  2. Select OPT in Transparent Mode. The OPT and WAN IP addresses are now identical.

 

  3. To add an address or range of addresses, click Add below the address range list. The Add Opt Entry dialog box displays.

 

  4. Enter a single IP address or the beginning of a range of IP addresses in the IP Address From field.

 

  Note: The address or range of addresses must be within the available range of IP addresses for your WAN interface.

 

  5. For a range of IP addresses, enter the ending address in the IP Address To field.

 

  6. Click OK and then click Apply.

 

Configuring NAT Mode

 

NAT Enabled mode gives the OPT interface a single IP address and a subnet of available IP addresses. The IP addresses of devices connecting to the OPT interface are

translated to the single OPT interface IP address.

 

1. Click the Edit Icon in the line for the OPT interface in the Interfaces table. The OPT Properties window displays.

 

2. Select OPT in NAT Mode.

 

3. Enter an IP address in the OPT Private Address field.

 

4. Enter the subnet mask in the OPT Subnet Mask field.

 

5. If you want to use the OPT interface as a DMZ, enter a publicly visible IP address in the DMZ NAT Many-to-One Public Address field. This address will be visible to the internet for public servers in your network.

 

Click OK.