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

SearchCompliance

  • Whistleblower Protection Act

    The Whistleblower Protection Act of 1989 is a law that protects federal government employees in the United States from ...

  • smart contract

    A smart contract, also known as a cryptocontract, is a computer program that directly controls the transfer of digital currencies...

  • risk map (risk heat map)

    A risk map, also known as a risk heat map, is a data visualization tool for communicating specific risks an organization faces. A...

SearchSecurity

  • buffer underflow

    Buffer underflow, also known as buffer underrun or buffer underwrite, is a threat to data that typically occurs when the ...

  • digital signature

    A digital signature is a mathematical technique used to validate the authenticity and integrity of a message, software or digital...

  • denial-of-service attack

    A denial-of-service attack is a security event that occurs when an attacker prevents legitimate users from accessing specific ...

SearchHealthIT

SearchDisasterRecovery

  • virtual disaster recovery

    Virtual disaster recovery is a type of DR that typically involves replication and allows a user to fail over to virtualized ...

  • tabletop exercise (TTX)

    A tabletop exercise (TTX) is a disaster preparedness activity that takes participants through the process of dealing with a ...

  • risk mitigation

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

SearchStorage

  • secondary storage

    Secondary storage is storage for noncritical data that does not need to be frequently accessed.

  • Pure Storage

    Pure Storage is a provider of enterprise data flash storage solutions designed to substitute for electromechanical disk arrays.

  • yobibyte (YiB)

    A yobibyte (YiB) is a unit of measure used to describe data capacity as part of the binary system of measuring computing and ...

Close