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

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • risk management

    Risk management is the process of identifying, assessing and controlling threats to an organization's capital and earnings.

  • compliance as a service (CaaS)

    Compliance as a Service (CaaS) is a cloud service service level agreement (SLA) that specified how a managed service provider (...

  • data protection impact assessment (DPIA)

    A data protection impact assessment (DPIA) is a process designed to help organizations determine how data processing systems, ...

SearchSecurity

  • Web application firewall (WAF)

    A web application firewall (WAF) is a firewall that monitors, filters and blocks data packets as they travel to and from a ...

  • spyware

    Spyware is a type of malicious software -- or malware -- that is installed on a computing device without the end user's knowledge.

  • application whitelisting

    Application whitelisting is the practice of specifying an index of approved software applications or executable files that are ...

SearchHealthIT

SearchDisasterRecovery

  • business continuity plan (BCP)

    A business continuity plan (BCP) is a document that consists of the critical information an organization needs to continue ...

  • disaster recovery team

    A disaster recovery team is a group of individuals focused on planning, implementing, maintaining, auditing and testing an ...

  • cloud insurance

    Cloud insurance is any type of financial or data protection obtained by a cloud service provider. 

SearchStorage

  • DRAM (dynamic random access memory)

    Dynamic random access memory (DRAM) is a type of semiconductor memory that is typically used for the data or program code needed ...

  • RAID 10 (RAID 1+0)

    RAID 10, also known as RAID 1+0, is a RAID configuration that combines disk mirroring and disk striping to protect data.

  • 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.

Close