Minecraft: Troll mob traps? Troll proofing your house?

My cousin got me this mod that spawns new types of animals, which makes night alot more dangerous, my main problem is the trolls, their huge and they smash down houses, how can i troll proof my houses? are their traps i could set up that would fit them? are there any videos on youtube that could show me how to set something up?? send me a link if their is or name a specific video coz i cant find anything =/ THANKSSS!!!