.::. N3T .::.

Calculate your IPv4 into a NAT64 synthesized IPv6 address:

IPv4 address:

NAT64 prefix:

IPv6 address (synth.):

Calculate IPv4 from synthesized NAT64 address:

NAT64 address:

IPv4 address:

Sample configurations for NAT64 & DNS64:

Cisco IOS config example:

interface GigabitEthernet8
 description To internet access
 ip address 192.0.2.2 255.255.255.252
 no ip redirects
 no ip proxy-arp
 duplex auto
 speed auto
 nat64 enable
 ipv6 address FE80::2 link-local
 ipv6 address 2001:db8:20ff::2/64
 ipv6 enable
 ipv6 nd ra suppress all
!
interface Vlan666
 description IPv6 only clients
 no ip address
 nat64 enable
 ipv6 address FE80::1 link-local
 ipv6 address 2001:db8:666::1/64
 ipv6 enable
 ipv6 nd autoconfig default-route
!
ipv6 access-list NAT64
 permit ipv6 2001:db8:666::/64 64:FF9B::/96
!
nat64 v4 pool NAT64-IPv4 192.0.2.249 192.0.2.254
nat64 v6v4 list NAT64 pool NAT64-IPv4 overload
!

Bind9 config example:

options {
	// other config snipped
	dns64 64:ff9b::/96 {
		clients {
			2001:db8:666::/64;
		};
	};
};

Note: I've used the documentation IP ranges (192.0.2.0/24 and 2001:db8::/32).