@Domingo Gallardp
I can see you're new here.
The fact you asked that questions tells me you've not been through our rules. I would strongly advise you take the time to read through all our rules before you log on to the server again. Click the rules button at the top of the page.
We are a rule heavy server and falling foul of one may see you getting banned. Being new is no excuse in these situations.
To answer your question more specifically:
(2.1) Vehicle Deathmatch (also known as VDM) - Using any vehicle as a weapon (e.g running people over, causing explosions including while sling loading, ramming, etc), will result in you receiving a ban. Three vehicles are excluded from this, MRAPS (Ifrits, Hunters and Striders) can ram other MRAPS in order to disable them, yet not to kill the passengers. This is allowed as these vehicles are the only vehicles ingame that can withstand being rammed. Please note that you need to initiate roleplay before attempting to ram an MRAP. (Please note - MRAPS don't need to be initiated on in the redzone) This is to prevent random ramming on site. (Three minutes of chasing also constitutes initiation of MRAP and MRAP ramming)
Good Luck, have fun, play safe.