Whitelisting definition in Cybersecurity

Whitelisting is a cybersecurity strategy that allows only pre-approved software, email addresses, users, or IP addresses to access a particular system, network, or service, effectively blocking all others by default.

Open source or Free solutions

1. AppLocker (Windows feature)
2. Firejail (Linux sandboxing tool)

Paying solutions

1. Airlock Digital
2. Ivanti Application Control