Ports scanning protection

Updated 8 months ago by Alesja Tsernoseva

Port scanning protection is available in the browser profile "Other" section.

A user can enable Port scanning protection solution in browser profile settings, which will disable websites from understanding if some ports are open or not. This will disable all ports from being scanned. The user is able to add an expectation to this by providing a list of ports that websites can scan.

This solution won’t save from external scanning with Nmap, which is used on Albeit it is not utilized by websites as far as we know due to legal reasons.

In computer science, a port is a communication endpoint. When an application is running on the computer it opens a port. This port now acts as an address with which other applications can interact with others.


  • TeamViewer opens the following ports: 80, 443 and 5938 (TCP)
  • RDP (Remote Desktop Protocol) opens these port: 3389 (TCP and UDP)

A port can be any number from 0 to 65535.

Websites, utilizing local open port scanning through web sockets, can see what ports are open a particular computer and as a result, understand what program our users are running. We have confirmation from our technical team that Facebook, eBay, and Amazon has been doing it.

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