Timed firewall rules - is it possible?

Hi All,

Is it possible to use a script to set a temporary firewall rule that lasts for say 5 minutes?

I am using the Mikrotik RouterOS as a hotspot with the payment system hosted centrally. When a user connects to the hotspot I need to allow port 443 for 5 minutes to allow them to pass through the payment system without error - this is because the Verified By Visa/Mastercard and 3D Secure measures redirect them to a site to authenticate. It is not possible to list all these sites in the walled garden.

Kind regards,

Tim