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DNS 
Solutions Challenges Features & Benefits

DNS High Availability and Flood Mitigation

DNS service challenges include

  • DNS availability – To ensure DNS service continuity carriers need the ability to process a very large number of queries across abrupt load situations and effectively scale DNS services to meet service growth

  • DNS service integrity – DNS is highly susceptible to direct and indirect service floods and security exploits like the following
  • DNS service floods, caused by direct Denial of Service (DoS) and Distributed Denial of Service (DDoS) attacks targeted at a DNS server address and reverse DNS request overloads effecting DNS servers optimized for standard DNS request processing volumes

  • Exploits targeting known DNS vulnerabilities exploit common buffer overflows and take advantage of DNS program vulnerabilities which result in the termination of the DNS service

  • DNS servers running on standard operating systems are vulnerable to OS exploits that threaten DNS server and service integrity
boxr2c1 The Domain Name System (DNS) is an Internet directory service. DNS translates domain names into IP addresses. DNS name resolution is an essential component for customer Internet connectivity. It is also critical for the operation of operational support system (OSS) applications including web-based billing, customer relationship management (CRM), contact centers and internal carrier applications such as email, VoIP and intranet. DNS server farms are installed in both carrier data centers and in point of presence (POPs). When DNS processing fails, carrier mission-critical applications that rely on the translation of domain names into IP addresses become unavailable.