It appears there is no information about this service provided online though it is readily accessible in the “My Profile” section of the management console.

How to set up 2FA for Internet.bs:

1. Login to your account.
2. Under “My Account”, click My Profile.
3. At the top of the page, click “Enable” next to “Two-step login verification”.
4. Follow the set up wizard to configure your 2FA provider.
5. Next time you log in to Internet.bs it will prompt you for your 2FA token.