Try this. I run it on a FTB Direwolf20 server with no problem. It's not a complete Essential, but it's simple to use. To block creeper damage there's a new Minecraft Vanilla rule, simply type the command: gamerule mobGriefing false
fihgu's does work. but sadly , only update made from FTB pack beta on mc 1.4.2 till present was only to update to curent MC version, no bugfixes,no new features... nothing