Well......nothing...is not working...
Here is a pic of my network

and here is the guide on page 173 of the DFL-210 manual
Example 4.14. Setting up Transparent Mode for Scenario 1
Web Interface
Configure the interfaces:
1.    Go to Interfaces > Ethernet > Edit (wan)
2.    Now enter:
•    IP Address: 10.0.0.1
•    Network: 10.0.0.0/24
•    Default Gateway: 10.0.0.1
•    Transparent Mode: Enable
3.    Click OK
4.    Go to Interfaces > Ethernet > Edit (lan)
5.    Now enter:
•    IP Address: 10.0.0.2
•    Network: 10.0.0.0/24
•    Transparent Mode: Enable
6.    Click OK
Configure the rules:
1.    Go to Rules > IP Rules > Add > IPRule
2.    Now enter:
•    Name: HTTPAllow
•    Action: Allow
•    Service: http
•    Source Interface: lan
•    Destination Interface: any
•    Source Network: 10.0.0.0/24
•    Destination Network: all-nets (0.0.0.0/0)
3.    Click OK