How to block IPv6 (Teredo tunnel) on router for client host?

[Levko]

Folks, would you please assist how to BLOCK IPv6 (Teredo tunnel) on router for client host? 

I have Meraki MX series and I want to block teredo tunnel for prohibit use it for client By MX router. 
And additional question can I use group policy for allow it in some schedule? 

[alemabrahao]

You can leverage L3 Firewall rules to allow or block IPv6 traffic. You can create a rule to block the protocol 41 encapsulation and the 3544/UDP Teredo server port. 

IPv6 Support on MX Security & SD-WAN Platforms - Security - Cisco Meraki Documentation