DDWRT Wan Port is not working

If you, like me have TP-Link WR1043ND with DDWRT on it and after assigning a wan port to switch realized that it’s not working just go to:

Administration, Commands and paste the code below in the text field:

swconfig dev rtl8366rb vlan 1 set ports ‘0 1 2 3 4 5t’
stopservice lan
startservice lan

Hit the “Save startup” button

And now restart your router for the changes to take effect and your’re done!

Solution found searching DDWRT forum.