254116 CentOS / cPanel Guru Required

Our server is currently facing some serious DDos attacks which overloaded our server, we already tried to block IPs with too much connections but it seems that the server has stopped responding again. We want you to resolve this issue for us effectively and keep down our server load. We are only hosting 1 single forum + a few albums on this server, it shouldn't overload a server under normal circumstances. NOTE : You MUST have highly experience in CentOS & cPanel, so as fighting against high server load issues. We want you to start ASAP once chosen.