C2 Server
Noun · Security & Infosec
Definitions
A server that receives check-ins from compromised hosts and sends them instructions, payloads, or updates as part of command-and-control infrastructure. Identifying and disrupting C2 servers is a core objective in incident response.
In plain English: A server used by attackers to control infected machines.
Example: "The malware beaconed every five minutes to a C2 server hosted behind fast-flux infrastructure."