Yesterday afternoon, I finally managed to install Tomato firmware on my router.
Though I went back to DD WRT two hours later after Tomato was installed.
Despite Tomato has a better Qos than DD WRT does, I can't figure out how to set myself as an exception in the Qos, so I was restricted by it as well. And I think DD WRT has a better user interface and it is easier to configure. So long Tomato.
Please feel free to point out any mistakes in my messages. That will be helpful for me to make less mistakes in the future.
Any help will be appreciated.