My ISP was "nice" enough to supply a router that could be flashed with DD-WRT (it's fiber (to the home) so it's just a box on the wall straight into the router,

My ISP was "nice" enough to supply a router that could be flashed with DD-WRT (it's fiber (to the home) so it's just a box on the wall straight into the router, so whats actually running on the router is under my control).