It is mandatory that all DDOS shared hosting clients use Rivalhost Global Protected Name-servers and highly recommend for all other DDOS clients to always rely on our DDOS name-servers to resolve your "A" record rather than setting it independantly at your registrar or authoritative host.
This means in basic terms...just point your domain to your name-servers or the name-servers we supplied and remove any custom "A" records you may have set.