mirror of
https://github.com/vyos/vyos-documentation.git
synced 2025-11-04 00:02:05 +01:00
82 lines
2.6 KiB
ReStructuredText
82 lines
2.6 KiB
ReStructuredText
.. _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
|