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wl500gp -pre12

nvram show|grep routes
wan_route=
lan_route=
wan_route_x=IP_Routed
default_router_disable=0
wan0_route=
router_disable=0
size: 14034 bytes (18734 left

I know that this hardware is not recommended at this forum.
But does it possible and how it hard to modify asus firmware (1.9.4.6) to enable IGMP & Multicast?