A DDoS or Distributed Denial of Service attack takes place when several systems flood the resources or bandwidth of any targeted system. Mostly web servers that host high profile sites, DNS servers and mail servers are the most common targets of such attacks. DDoS attacks unable the servers to their intended users and also badly affect those customers also who might be also using the service of shared network. This result in the loss of revenue and several dissatisfied customers. Due to the increasing DDoS attacks, the IT administrators all over the world have come up with anti DDoS solution for the protection of IT environments. The DDoS solution enables clients in each industry to safeguard their businesses from the DDoS attacks.