STERLING, Va.--(BUSINESS WIRE)--#DDOS--Neustar®, Inc., a trusted, neutral provider of real-time information services, today announced that it has entered into a definitive agreement with VeriSign, Inc. to acquire Verisign’s Security Services customer contracts. The acquisition consists of Distributed Denial of Service (DDoS) Protection, Managed DNS, DNS Firewall and fee-based Recursive DNS services customer contracts. Trusted by the world’s largest brands, Neustar will provide Verisign’s former Securi.