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| -rw-r--r-- | docs/configuration/nat/index.rst | 1 | ||||
| -rw-r--r-- | docs/configuration/nat/nat64.rst | 81 |
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diff --git a/docs/configuration/nat/index.rst b/docs/configuration/nat/index.rst index 90275226..6556b7f9 100644 --- a/docs/configuration/nat/index.rst +++ b/docs/configuration/nat/index.rst @@ -9,4 +9,5 @@ NAT :includehidden: nat44 + nat64 nat66 diff --git a/docs/configuration/nat/nat64.rst b/docs/configuration/nat/nat64.rst new file mode 100644 index 00000000..e8a3a0e6 --- /dev/null +++ b/docs/configuration/nat/nat64.rst @@ -0,0 +1,81 @@ +.. _nat64: + +##### +NAT64 +##### + +:abbr:`NAT64 (IPv6-to-IPv4 Prefix Translation)` is a critical component in +modern networking, facilitating communication between IPv6 and IPv4 networks. +This documentation outlines the setup, configuration, and usage of the NAT64 +feature in your project. Whether you are transitioning to IPv6 or need to +seamlessly connect IPv4 and IPv6 devices. +NAT64 is a stateful translation mechanism that translates IPv6 addresses to +IPv4 addresses and IPv4 addresses to IPv6 addresses. NAT64 is used to enable +IPv6-only clients to contact IPv4 servers using unicast UDP, TCP, or ICMP. + + +Overview +======== + +Different NAT Types +------------------- + +.. _source-nat64: + +SNAT64 +^^^^^^ + +:abbr:`SNAT64 (IPv6-to-IPv4 Source Address Translation)` is a stateful +translation mechanism that translates IPv6 addresses to IPv4 addresses. + +``64:ff9b::/96`` is the well-known prefix for IPv4-embedded IPv6 addresses. +The prefix is used to represent IPv4 addresses in an IPv6 address format. +The IPv4 address is encoded in the low-order 32 bits of the IPv6 address. +The high-order 32 bits are set to the well-known prefix 64:ff9b::/96. + + +Configuration Examples +====================== + +The following examples show how to configure NAT64 on a VyOS router. +The 192.0.2.10 address is used as the IPv4 address for the translation pool. + + +NAT64 server configuration: + +.. code-block:: none + + set interfaces ethernet eth0 address '192.0.2.1/24' + set interfaces ethernet eth0 address '192.0.2.10/24' + set interfaces ethernet eth0 description 'WAN' + set interfaces ethernet eth1 address '2001:db8::1/64' + set interfaces ethernet eth1 description 'LAN' + + set service dns forwarding allow-from '2001:db8::/64' + set service dns forwarding dns64-prefix '64:ff9b::/96' + set service dns forwarding listen-address '2001:db8::1' + + set nat64 source rule 100 source prefix '64:ff9b::/96' + set nat64 source rule 100 translation pool 10 address '192.0.2.10' + set nat64 source rule 100 translation pool 10 port '1-65535' + +NAT64 client configuration: + +.. code-block:: none + + set interfaces ethernet eth1 address '2001:db8::2/64' + set protocols static route6 64:ff9b::/96 next-hop 2001:db8::1 + set system name-server '2001:db8::1' + +Test from the IPv6 only client: + +.. code-block:: none + + vyos@r1:~$ ping 64:ff9b::192.0.2.1 count 2 + PING 64:ff9b::192.0.2.1(64:ff9b::c000:201) 56 data bytes + 64 bytes from 64:ff9b::c000:201: icmp_seq=1 ttl=63 time=0.351 ms + 64 bytes from 64:ff9b::c000:201: icmp_seq=2 ttl=63 time=0.373 ms + + --- 64:ff9b::192.0.2.1 ping statistics --- + 2 packets transmitted, 2 received, 0% packet loss, time 1023ms + rtt min/avg/max/mdev = 0.351/0.362/0.373/0.011 ms |