#REDIRECT [[Botnet#Command_and_control]] {{R from Merge}}
In the field of [[computer security]], '''command and control''' (C&C) infrastructure consists of servers and other technical infrastructure used to control [[malware]]. Command and control servers may be either directly controlled by the malware operators, or themselves run on hardware compromised by malware. [[Fast-flux DNS]] can be used as a way to make it difficult to track down the control servers, which may change from day to day. In some cases, C&C networks can be overlaid on other existing benign infrastructure such as [[IRC]] or [[Tor]], or [[peer-to-peer networking]] systems may be used to create C&C systems that are not dependent on any fixed servers at all.
