Configuring Next Gen Services Stateful NAT64
Perform the following steps to configure Next Gen Services Stateful NAT64
Configuring the Source Pool for Stateful NAT64
To configure the source pool for Stateful NAT64:
- Create a source pool.
user@host# edit services nat source pool nat-pool-name
- Define the addresses or subnets to which source addresses
are translated.
[edit services nat source pool nat-pool-name] user@host# set address address-prefix
or
[edit services nat source pool nat-pool-name] user@host# set address address-prefix to address address-prefix
To disable round-robin port allocation for all NAT pools that do not specify an
automatic (random-allocation | round-robin)setting, configure the global setting.[edit services nat source] user@host# set port-round-robin disable
- To configure a range of ports to assign to a pool, perform
the following:Note:
If you specify a range of ports to assign, the
automaticstatement is ignored.- Specify the low and high values for the port. If you do
not configure automatic port assignment, you must configure a range
of ports.
[edit services nat source pool nat-pool-name port] user@host# set range port-low to port-high
- Specify either random allocation or round-robin allocation.
Round-robin allocation is the default.
[edit services nat source pool nat-pool-name port range] user@host# set (random-allocation | round-robin)
- Specify the low and high values for the port. If you do
not configure automatic port assignment, you must configure a range
of ports.
- Assign a port within the same range as the incoming port—either
0 through 1023 or 1024 through 65,535. This feature is not available
if you configure port-block allocation.
[edit services nat source pool nat-pool-name port] user@host# set preserve-range
- Assign a port with the same parity (even or odd) as the
incoming port. This feature is not available if you configure port-block
allocation.
[edit services nat source pool nat-pool-name port] user@host# set preserve-parity
- Configure a global default port range for NAT pools that
use port translation. This port range is used when a NAT pool does
not specify a port range and does not specify automatic port assignment.
The global port range can be from 1024 through 65,535.
[edit services nat source] user@host# set pool-default-port-range port-low to port-high
- Configure the source pool without port translation.
[edit services nat source pool nat-pool-name] user@host# set address-pooling no-paired
- Configure the maximum number of ports that can be allocated
for each host. The range is 2 through 65,535.
[edit services nat source pool nat-pool-name] user@host# set limit-ports-per-host number
- If you want to allocate a block of ports for each subscriber
to use, configure port-block allocation:
- Configure the number of ports in a block. The range is
1 through 64,512 and the default is 128.
[edit services nat source pool nat-pool-name port] user@host# set block-allocation block-size block-size
- Configure the interval, in seconds, for which the block
is active. After the timeout, a new block is allocated, even if ports
are available in the active block. If you set the timeout to 0, port
blocks are filled completely before a new port block is allocated,
and the last port block remains active indefinitely. The range is
0 through 86,400, and the default is 0.
[edit services nat source pool nat-pool-name port block-allocation] user@host# set active-block-timeout timeout-interval
- Specify the timeout period for address-pooling paired
mappings that use the NAT pool. The range is 120 through 86,400 seconds,
and the default is 300. Mappings that are inactive for this amount
of time are dropped.
[edit services nat source pool nat-pool-name] user@host# set mapping-timeout mapping-timeout
If you do not configure
ei-mapping-timeoutfor endpoint independent translations, then themapping-timeoutvalue is used for endpoint independent translations. - Configure the maximum number of blocks that can be allocated
to a user address. The range is 1 through 512, and the default is
8.
[edit services nat source pool nat-pool-name port block-allocation] user@host# set maximum-blocks-per-host maximum-block-number
- Specify how often to send interim system logs for active
port blocks and for inactive port blocks with live sessions. This
increases the reliability of system logs, which are UDP-based and
can get lost in the network. The range is 1800 through 86,400 seconds,
and the default is 0 (interim logs are disabled).
[edit services nat source pool nat-pool-name port block-allocation] user@host# set interim-logging-interval timeout-interval
- Configure the number of ports in a block. The range is
1 through 64,512 and the default is 128.
- Specify the timeout period for endpoint independent translations
that use the specified NAT pool. Mappings that are inactive for this
amount of time are dropped. The range is 120 through 86,400 seconds.
If you do not configure
ei-mapping-timeout, then themapping-timeoutvalue is used for endpoint independent translations.[edit services nat source pool nat-pool-name] user@host# set ei-mapping-timeout ei-mapping-timeout
- Specify the timeout period for address-pooling paired
mappings that use the NAT pool. The range is 120 through 86,400 seconds,
and the default is 300. Mappings that are inactive for this amount
of time are dropped.
[edit services nat source pool nat-pool-name] user@host# set mapping-timeout mapping-timeout
If you do not configure
ei-mapping-timeoutfor endpoint independent translations, then themapping-timeoutvalue is used for endpoint independent translations. - To allow the IP addresses of a NAT source pool to overlap
with IP addresses in pools used in other service sets, configure
allow-overlapping-pools.[edit services nat] user@host# set allow-overlapping-pools
Configuring the NAT Rules for Stateful NAT64
For Stateful NAT64, you must configure a source rule and a destination rule. To configure the NAT rules for Stateful NAT64:
- Configure the source NAT rule name.
[edit services nat source] user@host# set rule-set rule-set-name rule rule-name
- Specify the traffic direction to which the NAT rule set
applies.
[edit services nat source rule-set rule-set-name] user@host# set match-direction (in | out | in-out)
- Specify the IPv6 source addresses that are translated
by the NAT rule.
[edit services nat source rule-set rule-set-name rule rule-name] user@host# set match source-address address
- Configure the matching destination address as 0.0.0.0/0.
[edit services nat source rule-set rule-set-name rule rule-name] user@host# set match destination-address 0.0.0.0/0
- Specify one or more application protocols to which the
NAT rule applies. The number of applications listed in the rule must
not exceed 3072.
[edit services nat source rule-set rule-set-name rule rule-name] user@host# set match application [application-name]
- Specify the NAT source pool that contains the addresses
for translated source addresses.
[edit services nat source rule-set rule-set-name rule rule-name] user@host# set then source-nat pool nat-pool-name
- Configure endpoint-independent mapping, which ensures
that the same external address and port are assigned to all connections
from a given host.
- Configure the mapping type as endpoint independent.
[edit services nat source rule-set rule-set-name rule rule-name then source-nat] user@host# set mapping-type endpoint-independent
- Specify prefix lists that contain the hosts that are allowed
to establish inbound connections using the endpoint-independent mapping.
(Prefix lists are configured at the
[edit policy-options]hierarchy level.)[edit services nat source rule-set rule-set-name rule rule-name then source-nat] user@host# set filtering-type endpoint-independent prefix-list [allowed-host] except [denied-host]
- Specify the maximum number of inbound flows allowed simultaneously
on an endpoint-independent mapping.
[edit services nat source rule-set rule-set-name rule rule-name then source-nat] user@host# set secure-nat-mapping eif-flow-limit number-of-flows
- Specify the direction in which active endpoint-independent
mapping is refreshed. By default, mapping is refreshed for both inbound
and outbound active flows.
[edit services nat source rule-set rule-set-name rule rule-name then source-nat] user@host# set secure-nat-mapping mapping-refresh (inbound | inbound-outbound | outbound)
- Configure the mapping type as endpoint independent.
- Configure the destination NAT rule name.
[edit services nat destination] user@host# set rule-set rule-set-name rule rule-name
- Specify the traffic direction to which the destination
NAT rule set applies.
[edit services nat destination rule-set rule-set-name] user@host# set match-direction (in | out | in-out)
- Specify the IPv6 prefix source addresses that are translated
by the destination NAT rule. Use the same value that you used for
the NAT source rule.
[edit services nat destination rule-set rule-set-name rule rule-name] user@host# set match source-address address
- Specify the prefix that is used to embed the IPv4 destination
address in the IPv6 destination address.
[edit services nat destination rule-set rule-set-name rule rule-name] user@host# set then destination-nat destination-prefix destination-prefix
- Configure the IPv6 destination address to match. This
is the IPv4 destination address embedded in IPv6 by using the
destination-prefix.[edit services nat destination rule-set rule-set-name rule rule-name] user@host# set match destination-address address
- Configure the generation of a syslog when traffic matches
the NAT rule conditions.
[edit services nat (source | destination) rule-set rule-set-name rule rule-name then] user@host# set syslog
Configuring the Service Set for Stateful NAT64
To configure the service set for stateful NAT64:
- Define the service set.
[edit services] user@host# edit service-set service-set-name
- Configure either an interface service, which requires
a single service interface, or a next-hop service, which requires
an inside and outside service interface.
[edit services service-set service-set-name] user@host# set interface-service service-interface interface-name
or
[edit services service-set service-set-name] user@host# set next-hop-service inside-service-interface interface-name outside-service-interface interface-name
- Specify the NAT rule sets to be used with the service
set.
[edit services service-set service-set-name] user@host# set nat-rule-sets rule-set-name
Clearing the Don’t Fragment Bit
To prevent unnecessary creation of IPv6 fragmentation headers when translating IPv4 packets that are less than 1280 bytes, you can specify that the don’t fragment (DF) bit for IPv4 packet headers is cleared when the packet length is less than 1280 bytes.
[edit services nat natv6v4] user@host# set clear-dont-fragment-bit