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Diffstat (limited to 'docs/configuration/nat/nat66.rst')
| -rw-r--r-- | docs/configuration/nat/nat66.rst | 90 |
1 files changed, 51 insertions, 39 deletions
diff --git a/docs/configuration/nat/nat66.rst b/docs/configuration/nat/nat66.rst index bcf5570f..c5a8dec0 100644 --- a/docs/configuration/nat/nat66.rst +++ b/docs/configuration/nat/nat66.rst @@ -4,11 +4,12 @@ NAT66(NPTv6) ############ -:abbr:`NPTv6 (IPv6-to-IPv6 Network Prefix Translation)` is an address translation technology based -on IPv6 networks, used to convert an IPv6 address prefix in an IPv6 message into another IPv6 -address prefix. We call this address translation method NAT66. Devices that support the NAT66 -function are called NAT66 devices, which can provide NAT66 source and destination address -translation functions. +:abbr:`NPTv6 (IPv6-to-IPv6 Network Prefix Translation)` is an address +translation technology basedon IPv6 networks, used to convert an IPv6 +address prefix in an IPv6 message into another IPv6address prefix. +We call this address translation method NAT66. Devices that support the NAT66 +function are called NAT66 devices, which can provide NAT66 source +and destination address translation functions. Overview ======== @@ -21,36 +22,45 @@ Different NAT Types SNAT66 ^^^^^^ -:abbr:`SNPTv6 (Source IPv6-to-IPv6 Network Prefix Translation)` The conversion function is mainly used in -the following scenarios: - -* A single internal network and external network. Use the NAT66 device to connect a single internal - network and public network, and the hosts in the internal network use IPv6 address prefixes that - only support routing within the local range. When a host in the internal network accesses the - external network, the source IPv6 address prefix in the message will be converted into a - global unicast IPv6 address prefix by the NAT66 device. -* Redundancy and load sharing. There are multiple NAT66 devices at the edge of an IPv6 network - to another IPv6 network. The path through the NAT66 device to another IPv6 network forms an - equivalent route, and traffic can be load-shared on these NAT66 devices. In this case, you - can configure the same source address translation rules on these NAT66 devices, so that any - NAT66 device can handle IPv6 traffic between different sites. -* Multi-homed. In a multi-homed network environment, the NAT66 device connects to an - internal network and simultaneously connects to different external networks. Address - translation can be configured on each external network side interface of the NAT66 - device to convert the same internal network address into different external network - addresses, and realize the mapping of the same internal address to multiple external addresses. +:abbr:`SNPTv6 (Source IPv6-to-IPv6 Network Prefix Translation)` The conversion +function is mainly used in the following scenarios: + +* A single internal network and external network. Use the NAT66 device to + connect a single internal network and public network, and the hosts in + the internal network use IPv6 address prefixes that only support + routing within the local range. When a host in the internal network + accesses the external network, the source IPv6 address prefix in + the message will be converted into a global unicast IPv6 address + prefix by the NAT66 device. +* Redundancy and load sharing. There are multiple NAT66 devices at the edge + of an IPv6 network to another IPv6 network. The path through the NAT66 + device to another IPv6 network forms an equivalent route, and traffic + can be load-shared on these NAT66 devices. In this case, you + can configure the same source address translation rules on these + NAT66 devices, so that any NAT66 device can handle IPv6 traffic between + different sites. +* Multi-homed. In a multi-homed network environment, the NAT66 device + connects to an internal network and simultaneously connects to + different external networks. Address translation can be configured + on each external network side interface of the NAT66 device to + convert the same internal network address into different external + network addresses, and realize the mapping of the same internal + address to multiple external addresses. .. _destination-nat66: DNAT66 ^^^^^^ -The :abbr:`DNPTv6 (Destination IPv6-to-IPv6 Network Prefix Translation)` destination address translation -function is used in scenarios where the server in the internal network provides services to the external -network, such as providing Web services or FTP services to the external network. By configuring the mapping -relationship between the internal server address and the external network address on the external network -side interface of the NAT66 device, external network users can access the internal network server through -the designated external network address. +The :abbr:`DNPTv6 (Destination IPv6-to-IPv6 Network Prefix Translation)` +destination address translation function is used in scenarios where the +server in the internal network provides services to the external network, +such as providing Web services or FTP services to the external network. +By configuring the mapping relationship between the internal server +address and the external network address on the external network +side interface of the NAT66 device, external network users can +access the internal network server through the designated +external network address. Prefix Conversion ------------------ @@ -62,8 +72,8 @@ Every SNAT66 rule has a translation command defined. The prefix defined for the translation is the prefix used when the address information in a packet is replaced.、 -The :ref:`source-nat66` rule replaces the source address of the packet and calculates the -converted address using the prefix specified in the rule. +The :ref:`source-nat66` rule replaces the source address of the packet +and calculates the converted address using the prefix specified in the rule. Example: @@ -74,18 +84,19 @@ Example: set nat66 source rule 1 outbound-interface 'eth0' set nat66 source rule 1 source prefix 'fc01::/64' - set nat66 source rule 1 translation prefix 'fc00::/64' + set nat66 source rule 1 translation address 'fc00::/64' Destination Prefix ^^^^^^^^^^^^^^^^^^ -For the :ref:`destination-nat66` rule, the destination address of the packet is -replaced by the address calculated from the specified address or prefix in the -`translation address` command +For the :ref:`destination-nat66` rule, the destination address of +the packet isreplaced by the address calculated from the specified +address or prefix in the `translation address` command Example: -* Convert the address prefix of a single `fc00::/64` network to `fc01::/64` +* Convert the address prefix of a single `fc00::/64` network + to `fc01::/64` * Input from `eth0` network interface .. code-block:: none @@ -97,8 +108,9 @@ Example: Configuration Examples ====================== -Use the following topology to build a nat66 based isolated network between internal -and external networks (dynamic prefix is not supported): +Use the following topology to build a nat66 based isolated +network between internal and external networks (dynamic prefix is +not supported): .. figure:: /_static/images/vyos_1_4_nat66_simple.png :alt: VyOS NAT66 Simple Configure @@ -114,7 +126,7 @@ R1: set nat66 destination rule 1 translation address 'fc01::/64' set nat66 source rule 1 outbound-interface 'eth0' set nat66 source rule 1 source prefix 'fc01::/64' - set nat66 source rule 1 translation prefix 'fc00:470:f1cd:101::/64' + set nat66 source rule 1 translation address 'fc00:470:f1cd:101::/64' R2: |