To set up an authentication system on a MikroTik HotSpot, especially in places like airports where users access the Wi-Fi network for a limited period of time, the best option is usually to use authentication based voucher o tickets.

This modality allows generating unique access credentials for each user, which are valid for a specific defined time. Let's see why this method is suitable and how it can be implemented:

Advantages of Voucher/Ticket Based Authentication

1. Access control: Allows you to limit Internet access to unauthorized users and ensure that only passengers or airport clients can use the service.
2. Time Limitation: You can set vouchers to expire after a certain period, such as 30 minutes, 1 hour, or however long you deem appropriate. This is ideal for managing user flow and ensuring that the service is offered equitably.
3. Ease of Distribution: Vouchers can be distributed physically at the airport or through automatic systems, such as kiosks or through boarding pass validation.
4. Personalization and Branding: Vouchers can be personalized with airport information, access instructions, and any other relevant information, offering a consistent and professional user experience.

Implementation in MikroTik HotSpot

To implement voucher authentication on a MikroTik HotSpot, you will need to follow several steps in RouterOS:

1. Configure HotSpot Server: Launch the HotSpot wizard in MikroTik to configure the service on the interface where Wi-Fi access will be provided. This will include network configuration, DHCP, and firewall rules.
2. Enable User Authentication: In the HotSpot configuration, make sure to enable user authentication and select the authentication method you prefer, which in this case would be through users and passwords that will be generated as vouchers.
3. Generate Users and Passwords (Vouchers): You can generate vouchers manually through the RouterOS interface, or use third-party tools designed to work with MikroTik and automate the creation and management of vouchers. There are scripts and applications that can facilitate this process, allowing you to generate batches of vouchers with different time validities.
4. Customize the Login Page: Customize the HotSpot login page to reflect the airport's branding and provide clear instructions on how to enter the voucher code.
5. Monitoring and Management: Use MikroTik's monitoring and reporting tools to track HotSpot usage, the number of connected users, and other important parameters to adjust settings as necessary.

Implementing voucher-based authentication in an airport environment with MikroTik HotSpot offers a flexible and controlled solution to provide temporary Internet access to travelers, while ensuring security and good bandwidth management.