Configure NAT Prefixes
Table of Contents
Configure NAT Prefixes
Learn how to configure local and global NAT prefixes.
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A prefix is a group of one or more individual
IP addresses or IP address subnets. Prefixes are a construct of
NAT which help to identify traffic. They can be either global or
local in scope. Global prefixes are used when traffic of interest across
all sites in a network can be identified with the same set of prefixes.
For example, facilities infrastructure or print services for an
enterprise. Local prefixes are used when specific prefix values
change by branch location. Use local prefixes to simplify creation
and administration of rules. For example, a subset of IP addresses
within a subnet.
- Configure global NAT prefixes.
- Select .Click Add Prefix, and then select Global from the drop-down list.On the Create Global Prefix screen, enter a name and description for the prefix.Enter an IP and subnet address.IP addresses within a prefix are defined by the subnet. For example, 10.1.1.0/24 defines the entire limit of 255 IPs in that subnet.Select NAT in the Create for policy Type(s) section to replicate the prefix for NAT policies.(Optional) You can create a copy of this prefix filter to be used in Path and QoS policies respectively by selecting the Path and QoS check boxes.Configure local NAT prefixes.
- Select .Click Add Prefix, and then select Local from the drop-down list.On the Create Local Prefix screen, enter a name and description for the prefix.Attach a site to the local prefix filter from the Choose a site drop-down.You must attach a local prefix filter to a site for the filter to work.Select NAT in the Create for policy Type(s) section to replicate the prefix for NAT policies.
