Close every port you don't use.

Port Security blocks the network ports on your computers that nothing should be talking to, and shows you exactly what's closed.

Buy now See what it does

Try it on a computer 0 of 65,536 ports blocked

Showing 8 common ports out of 65,536 per protocol. Select one to block it, and again to allow it.

Control the ports, not the guesswork

Every computer has 65,536 ports each for TCP and UDP. Port Security lets you decide which ones stay open and shuts the rest.

Block by port number or range

Close a single port like 23, or a whole range, in one rule. Works for TCP and UDP.
Set the direction

Stop inbound connections, outbound connections, or both, so you can close a port to the outside without breaking what the machine needs to do.
Profiles for different machines

A laptop, a kiosk, and a server shouldn't share the same open ports. Build a profile for each and apply it where it belongs.
A clear record of what's blocked

See which ports are closed on each computer and review the attempts that were stopped.

Shut a port in three moves

Pick what to close, apply it, and confirm it worked.

Choose

Select the ports to block, or start from a ready-made list of commonly exposed ports.
Apply

Push the rule to the computer. Port Security enforces it right away.
Verify

Check that the port is closed and keep the record for your files.

Where it gets used

Anywhere a computer is listening and shouldn't be.

Employee laptops and desktops

Keep file sharing, remote access, and old services closed by default.

Servers

Leave open only the ports a service actually needs.

Shared and public computers

Lock down kiosks, lab machines, and front-desk PCs.

Remote and home setups

Apply the same rules to machines that leave the office network.

Questions

Straight answers about what the product does.

What is a network port?

A port is a numbered doorway a computer uses to send and receive network traffic. For example, web traffic commonly uses 80 and 443, and remote desktop commonly uses 3389. An open port with nothing needing it is an unnecessary way in.

How is this different from a firewall?

A firewall is the usual way a computer's ports get filtered, and Port Security works at that same level. Its job is to make closing and tracking ports simple to set up and easy to see across your machines.

Will blocking a port break something?

It can if a program on the machine needs that port. Block only ports you know are unused, and start with a small set. You can allow a port again at any time.

Does this replace other security measures?

No. Closing ports reduces what's exposed, which is one layer. Keep updating software, using strong credentials, and following your other security practices.

Do I need administrator access?

Changing port rules on a computer generally requires administrator rights, so the person setting it up will need them.

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$35 per computer

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Close every port you don't use.

Control the ports, not the guesswork

Block by port number or range

Set the direction

Profiles for different machines

A clear record of what's blocked

Shut a port in three moves

Choose

Apply

Verify