Locking SFP Port Blocker, a premier Layer 1 Security Solution tackles the security risks of open ports with the Port Blocker, a solution that secures from unauthorized port access and security breaches The innovative design of the Port Blocker surpasses the conventional 'one size (or key) fits all' design of its competitors and offers four unique, flush mounted and proprietary locks and keys for unparalleled security. Locks unused SFP ports Secures against unauthorized access