Port Blocker
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A Port Blocker is a vital computer security component[1] that blocks and prevents open computer ports being used to compromise laptop, desktop, servers and other computer equipment.
Problem
[edit]BadUSB enabled memory sticks can be plugged into a computer's USB port for a few seconds to either capture your confidential data; insert malware or to prevent your computer working, even when it is not connected to a network[2]. Port Blockers can prevent these consequences and Juice jacking attacks. They can also provide Tamper-evidence of this been attempted.
Types
[edit]Permanent
[edit]These are intended to block ports, for good and offer tamper-evidence should their removal have been attempted.
Removable by Extraction Key
[edit]- USB
- Network port RJ45[3]
- Media output, including: HDMi, serial and parallel ports.
Cable Locked
[edit]These prevent denial-of-service either intentionally or accidentally (e.g. when moving servers).
All these types of port blockers are computer hardware protection mechanisms.
References
[edit]- ^ "What Is Port Security and Why Is It Important?". crowdsec.net. CrowdSec. 24 Oct 2024. Retrieved 5 March 2026.
- ^ "BadUSB Attack Prevention". kaspersky.com. Kaspersky Lab. 26 February 2026. Retrieved 5 March 2026.
- ^ Hartemink, Raymond (2025). "The best method for physically blocking your network port in your laptop". hart4technology.nl. Hart 4 Technology. Retrieved 5 March 2026.
