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
  • ISO 31000 Risk Management

    The ISO 31000 Risk Management framework is an international standard that provides businesses with guidelines and principles for ...

  • pure risk

    Pure risk refers to risks that are beyond human control and result in a loss or no loss with no possibility of financial gain.

  • risk reporting

    Risk reporting is a method of identifying risks tied to or potentially impacting an organization's business processes.

SearchSecurity
  • Pretty Good Privacy (PGP)

    Pretty Good Privacy or PGP was a popular program used to encrypt and decrypt email over the internet, as well as authenticate ...

  • cyberterrorism

    Cyberterrorism is often defined as any premeditated, politically motivated attack against information systems, programs and data ...

  • click fraud (pay-per-click fraud)

    Click fraud -- sometimes called 'pay-per-click fraud' -- is a type of fraud that artificially inflates traffic statistics for ...

SearchHealthIT
SearchDisasterRecovery
  • What is risk mitigation?

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

  • fault-tolerant

    Fault-tolerant technology is a capability of a computer system, electronic system or network to deliver uninterrupted service, ...

  • synchronous replication

    Synchronous replication is the process of copying data over a storage area network, local area network or wide area network so ...

SearchStorage
Close