How can I make my router more secure?

Episode 1192 (1:43:12)

Marco from Portugal
Asus Router

Marco just heard of yet another router hack called NET USB that is breaking into routers. Leo says that's because most router companies use the same code and it has bad security. The irony is that these hacks don't effect Apple routers like the Airport. So that makes the Airport a better way to go. But they are more expensive. If he can't afford to buy them, then he should get a router that is DDWRT compatible (like Asus), then he can use open source firmware to keep it locked down.