I presume your needing the custom ports seen here:
Gaming and QoS for XBLIf so and this model router does not have them, you'll need to get into a DIR series router that does have them, starting with the DIR-636L and DIR-826L series models and up routers in your region will have the additional QoS port configuration needed.
I'd recommend reviewing those models and others for your region for those options you need. There were several models likes your and below that didn't have the additional options and have fairly basic features.