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Lindy Port Blocker Range
Physical protection for your ports
Because every open port is a way in
An unattended USB or LAN port is all it takes for data leakage, unauthorised devices or malware via BadUSB — and even the best policy cannot protect a free port. The Lindy Port Blocker Range mechanically locks USB-A, USB-C, RJ45 and other interfaces; a blocker can only be removed with the matching key. Which blocker fits which interface — see the overview below.
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Why physical port security is essential today
- Unauthorised data leakage:
A free USB port is all it takes to copy sensitive data onto private storage media unnoticed – with no network access and without any firewall stepping in. - BadUSB & tampered hardware:
Manipulated USB sticks or cables can pose as a keyboard and execute malicious code within seconds. Conventional antivirus software often fails to detect this attack vector. - Compliance requirements:
GDPR, NIS2 and ISO 27001 require demonstrable measures against unauthorised data access. Physical port security provides a documentable, audit-proof building block for this. - Software alone is not enough:
Endpoint security solutions can be bypassed, disabled or patched. A physically blocked port stays reliably protected – regardless of operating system and software version.
When a free USB port becomes a security risk
Data leakage, malicious code, missing evidence in the audit — three problems that unsecured USB ports cause in companies time and again.
Employees copy data – and no one notices
An unattended USB port is all it takes to copy confidential documents onto a private stick unnoticed. Without a physical lock, this goes undetected – until the damage has long been done.
One tampered stick,
and the network grinds to a halt
BadUSB devices pose as a keyboard and smuggle in malicious code within seconds. Conventional antivirus software often doesn't even raise an alarm.
The auditor asks
for evidence – now what?
GDPR, NIS2 and ISO 27001 require documented measures against unauthorised data access. Without physical port security, there is no solid evidence.
Which port blocker fits your scenario?
Each starter kit contains 4 blockers and 1 matching key. Add-on sets without a key and individual replacement keys are available separately for each port type. For types with several colour variants, locks and keys of the same colour are keyed alike – different colours cannot be opened with the same key. This lets you, for example, separate different teams or areas by colour.
| Port type | Colour variants | Typical use |
|---|---|---|
| USB A | 5 colours, keyed alike per colour | Protects PC and notebook ports against unauthorised data transfer |
| USB C | 5 colours, keyed alike per colour | Protects modern notebooks and docking stations |
| RJ45 | 4 colours, keyed alike per colour | Secures unused network sockets in offices and public areas |
| SFP | 1 colour | Secures unused fibre optic ports on switches and patch panels |
| HDMI | 1 colour | Protects display connections on conferencing equipment and digital signage |
| DisplayPort | 1 colour | Protects monitor outputs at workstations and in meeting rooms |
The right protection for every port type
Classic USB ports
USB A Port Blocker
- Blocks USB-A ports against unauthorised storage devices
- Can only be removed with the matching key
- Available in 5 colours, keyed alike per colour
- Starter kit (4 blockers + 1 key), add-on sets & individual keys available
Port Blocker USB A – 5 colours
Modern notebooks
USB C Port Blocker
- Blocks USB-C ports on notebooks and docking stations
- Can only be removed with the matching key
- Available in 5 colours, keyed alike per colour
- Starter kit (4 blockers + 1 key), add-on sets & individual keys available
Port Blocker USB C – 5 colours
Network sockets
RJ45 Port Blocker
- Blocks unused network sockets against unauthorised access
- Can only be removed with the matching key
- Available in 4 colours, keyed alike per colour
- Starter kit (4 blockers + 1 key), add-on sets & individual keys available
Port Blocker RJ45 – 4 colours
Fibre optic ports
SFP Port Blocker
- Blocks unused SFP ports on switches and patch panels
- Can only be removed with the matching key
- Available in 1 colour
- Starter kit (4 blockers + 1 key), add-on sets & individual keys available
Port Blocker SFP
Display technology
HDMI Port Blocker
- Permanently blocks the HDMI port against unauthorised use
- Can only be removed with the matching key
- Available in 1 colour
- Starter kit (4 blockers + 1 key), add-on sets & individual keys available
Port Blocker HDMI
Monitor connections
DisplayPort Port Blocker
- Permanently blocks the DisplayPort connector against unauthorised use
- Can only be removed with the matching key
- Available in 1 colour
- Starter kit (4 blockers + 1 key), add-on sets & individual keys available
Port Blocker DisplayPort
We are happy to work with you to determine which ports in your company should be secured – based on your actual IT and security requirements.
How many workstations, network sockets and ports are affected? Is a single colour scheme enough, or should different teams receive different keys? And how does port security fit into your existing compliance documentation? Only once these questions have been answered can the right combination of port types and colour systems be clearly defined. This way we ensure that the solution truly fits your security architecture – with a free test sample on request.
Let's secure
your ports together
A short conversation, a concrete recommendation – with a free test sample for your port type on request.
Get a free consultation Find productsTypical areas of use...
...And your application
Office & workstation
USB-A and USB-C blockers secure PCs, notebooks and docking stations against data leakage via USB stick. RJ45 blockers seal unused network sockets – separated by team or department using the colour system.
Meeting rooms
Visitors and devices change here every day. HDMI® and DisplayPort blockers protect displays and conferencing equipment, while RJ45 blockers prevent third-party hardware from reaching the corporate network.
Public sector & public spaces
In citizens' service centres, waiting areas and reception areas, ports are often freely accessible. Physical locks support requirements from GDPR, NIS2 and ISO 27001 – visibly and without software.
Education
Computer labs, library PCs and classrooms are shared by many users. Port blockers prevent malware from being introduced via USB and stop the school network from being tapped via free sockets.
Digital Signage
Displays and media players in lobbies, corridors and shop windows are often left unattended. HDMI®, DisplayPort and USB blockers prevent content from being tampered with or third-party playback devices from being connected.
Point of sale & reception
POS systems, kiosk terminals and reception computers are within customers' reach. Locked USB ports protect against BadUSB attacks and tampered devices right at the counter.
Your direct line to our team
Technical questions, partner inquiries, requests for quotes, and more - we're here for you on weekdays until 6 p.m.
T: +34 930 46 50 92 / E: eusales@lindy.com
Frequently asked questions (FAQ)
Does the port blocker fit all ports of the same type?
Yes – within a port type (e.g. USB-A), the blocker fits regardless of the device manufacturer, as it is based on standardised connector dimensions. For very tightly spaced ports or special designs, we recommend a free test sample in advance.
What happens if I lose a key?
Lost keys can be reordered individually, provided the colour of the set concerned is known. As locks and keys are keyed alike per colour, a replacement key of the same colour opens all associated blockers.
How does the colour system work with the keys?
Each colour forms its own keyed-alike system: a red key opens only red blockers, a blue key only blue ones. This makes it easy, for example, to assign separate access rights to different teams or areas of responsibility. Depending on the port type, 1 to 5 colours are available.
Can I also reorder blockers or keys individually?
Yes. In addition to the starter kit (4 blockers + 1 key), both add-on sets without a key and individual replacement keys are available separately for each port type.
Wouldn't a software lock via Group Policy be enough?
Software locks can be bypassed or accidentally disabled through permission changes, patches or reinstallations. A physical port blocker remains effective regardless of operating system and admin rights – as an additional security layer that is visible at all times.
Does a USB-C port blocker also block charging via the same port?
Yes, an inserted port blocker prevents any connection via the blocked port – including charging. For devices that are charged exclusively via this port, an alternative charging port should be planned in advance.
Are there volume discounts for larger rollouts?
Yes, for larger quantities – for example to secure entire departments or sites – please contact us directly. We will be happy to put together a suitable offer for you.