A company has noticed recently that its corporate information has ended up on an online forum. An investigation has identified that internal employees are sharing confidential corporate information…

A URL filter blocking the specific forum can be trivially bypassed using personal devices, mobile hotspots, or VPNs, and does not prevent data from being shared on any other forum or channel.

NIDS (Network Intrusion Detection System) is designed to detect external attacks and anomalous network traffic, not to inspect or block authorized internal users from sending data to permitted external sites.

Security awareness training directly addresses the human behavior driving the leakage by educating employees on acceptable use policies, the consequences of sharing confidential information, and their legal and contractual obligations.

DLP (Data Loss Prevention) deployed at the desktop, email gateway, and web proxies creates a multi-layered technical barrier that detects and blocks confidential data from being transmitted regardless of the channel employees attempt to use.

Reviewing security policies and procedures is an administrative activity that does not directly prevent the behavior - employees are already violating existing policies, so a review alone does not stop ongoing leakage.