-A INPUT -s 2c0f:2240::/32 -j ACCEPT
-A INPUT -s 2c0f:2540::/32 -j ACCEPT
-A INPUT -s 2c0f:2640::/32 -j ACCEPT
-A INPUT -s 2c0f:4e80::/32 -j ACCEPT
-A INPUT -s 2c0f:f998::/32 -j ACCEPT