Board Thread:Tutorials/@comment-5885957-20121218102627/@comment-24019726-20131006164534

Crazyc92 wrote: Forcefields are impenetrable. Only 5 things can get through forcefields: catalytic lens (or lesser equivelant), wireless redstone, ender chest items, teleporters (item and player), and ComputerCraft rednet. Maybe I can find 2 other things that can get through, but not much can. If you set up your field right, not even these can get in. You can use enderpearls if  u want to know and with them its really easy to get in.