Protect standard RJ-45 ports that are not currently in use. An installed RJ45 port blocker serves as an effective visual and physical deterrent to unauthorized users. In addition, the locking RJ45 port protectors safeguards against particulate matter, preventing the accumulation of dust on the contacts within jacks. This ensures the reliable operation of critical infrastructure equipment such as servers, switches, and routers, preventing errors and potential downtime attributed to foreign particles in exposed slots.