Creating a guest wifi in Tomato is easy. Just follow these screen shots: To begin:

  1. Login to the Tomato Control Panel

  2. Click Network under basic settings and add a new lan connection as the screen shot shows:
    tomato lan

  3. Go to VLAN under advanced and create a new one linking it to the new LAN. You will have to restart the router after this operation.

Tomato vlan

  1. Add a new virtual wifi interface

tomato wifi

Job done!