Browse Definitions :
Definition

fast flux DNS

What is fast flux DNS?

Fast flux DNS is a technique that a cybercriminal can use to prevent identification of his key host server's IP address. By abusing the way the domain name system works, the criminal can create a botnet with nodes that join and drop off the network faster than law enforcement officials can trace them.

Fast flux DNS takes advantage of the way load balancing is built into the domain name system. DNS allows an administrator to register a number of IP addresses with a single host name. The alternate addresses are legitimately used to distribute Internet traffic among multiple servers. Typically, the IP addresses associated with a host domain do not change very often, if at all. 

However, criminals have discovered that they can hide key servers by using a sixty-second time-to-live (TTL) setting for their DNS resource records and swapping the records' associated IP addresses in and out with extreme frequency. Because abuse of the system requires the cooperation of a domain name registrar, most fast flux DNS botnets are believed to originate in emerging countries or other countries without laws for cybercrime. 

According to a white paper from the Honeypot Project, fast-flux botnets are responsible for many illegal practices, including  money mule recruitment sites, phishing websites, illicit online pharmacies,extreme or illegal adult content sites, malicious browser exploit sites and Web traps for distributing malware.

Learn More:

Security expert Ed Skoudis explains how fast flux DNS can be used to create a phishing botnet.

This paper from the Honeypot Project explains how criminals have abused the domain name system to create fast flux botnet systems.

This was last updated in November 2008
SearchCompliance
  • OPSEC (operations security)

    OPSEC (operations security) is a security and risk management process and strategy that classifies information, then determines ...

  • smart contract

    A smart contract is a decentralized application that executes business logic in response to events.

  • compliance risk

    Compliance risk is an organization's potential exposure to legal penalties, financial forfeiture and material loss, resulting ...

SearchSecurity
SearchHealthIT
SearchDisasterRecovery
  • What is risk mitigation?

    Risk mitigation is a strategy to prepare for and lessen the effects of threats faced by a business.

  • change control

    Change control is a systematic approach to managing all changes made to a product or system.

  • disaster recovery (DR)

    Disaster recovery (DR) is an organization's ability to respond to and recover from an event that affects business operations.

SearchStorage
  • PCIe SSD (PCIe solid-state drive)

    A PCIe SSD (PCIe solid-state drive) is a high-speed expansion card that attaches a computer to its peripherals.

  • VRAM (video RAM)

    VRAM (video RAM) refers to any type of random access memory (RAM) specifically used to store image data for a computer display.

  • virtual memory

    Virtual memory is a memory management technique where secondary memory can be used as if it were a part of the main memory.

Close