Firewall rule public ip

hy
i have a ccr1036 router, conection with my isp with public ip 1.1.1.2/30 gateway 1.1.1.1 on ether1
i have a 2.2.2.0/24 public ip class from my provider
i put ip address 2.2.2.1 on ether2 on my router
i setup dhcp server to assign other computer ip from 2.2.2.2 to 2.2.2.253
i want to route class 2.2.2.0 to have internet (what firewall rule i have to put there ?)
Thank you.