What is the main function of a sinkhole in network security?

The primary function of a sinkhole in network security is to prevent users from accessing unauthorized locations on the internet. A sinkhole effectively redirects and traps malicious traffic by resolving the DNS queries for known harmful domains to a designated IP address, which is under the control of the security team. This method helps in mitigating threats by ensuring that any attempts to reach these malicious sites lead users to a safe, monitored location, rather than allowing them to interact with the malicious content. In this way, sinkholes serve as a proactive defense mechanism that can help in identifying and analyzing malicious traffic patterns while protecting users from potential harm.