Whatever you have, if your connection is inferior to the bandwidth of the attack, you'll always get flooded :)
You can't solve it "locally", you need to find a provider that really helps you.
Don't go to OVH, their support is shit. Their 150€ firewall is only till 100 Mbit, it won't help u at all.
Btw, it was Finito who ddosed my server. Better get a protection, or he might ddos your server too :)