Cisco ASA Series Cli Configuration Manual page 793

Chapter 1 Configuring Network Object NAT
Command
Step 4
nat [(real_ifc,mapped_ifc)] static
{mapped_inline_ip | mapped_obj | interface
[ipv6]} [net-to-net] [dns | service {tcp |
udp} real_port mapped_port] [no-proxy-arp]
Example:
hostname(config-network-object)# nat
(inside,outside) static MAPPED_IPS service
tcp 80 8080
Purpose
Configures static NAT for the object IP addresses. You can only
define a single NAT rule for a given object.
•
Interfaces—(Required for transparent mode) Specify the real
and mapped interfaces. Be sure to include the parentheses in
your command. In routed mode, if you do not specify the real
and mapped interfaces, all interfaces are used; you can also
specify the keyword any for one or both of the interfaces.
•
Mapped IP Addresses—You can specify the mapped IP
address as:
–
An inline IP address. The netmask or range for the
mapped network is the same as that of the real network.
For example, if the real network is a host, then this
address will be a host address. In the case of a range, then
the mapped addresses include the same number of
addresses as the real range. For example, if the real
address is defined as a range from 10.1.1.1 through
10.1.1.6, and you specify 172.20.1.1 as the mapped
address, then the mapped range will include 172.20.1.1
through 172.20.1.6.
–
An existing network object or group (see
–
interface—(Static NAT-with-port-translation only;
routed mode) For this option, you must configure a
specific interface for the mapped_ifc. If you specify ipv6,
then the IPv6 address of the interface is used. Be sure to
also configure the service keyword.
Typically, you configure the same number of mapped
addresses as real addresses for a one-to-one mapping. You
can, however, have a mismatched number of addresses. See
the "Static NAT" section on page
•
Net-to-net—(Optional) For NAT 46, specify net-to-net to
translate the first IPv4 address to the first IPv6 address, the
second to the second, and so on. Without this option, the
IPv4-embedded method is used. For a one-to-one translation,
you must use this keyword.
•
DNS—(Optional) The dns keyword translates DNS replies.
Be sure DNS inspection is enabled (it is enabled by default).
See the "DNS and NAT" section on page
not available if you specify the service keyword.
•
Port translation—(Static NAT-with-port-translation only)
Specify tcp or udp and the real and mapped ports. You can
enter either a port number or a well-known port name (such
as ftp).
•
No Proxy ARP—(Optional) Specify no-proxy-arp to disable
proxy ARP for incoming packets to the mapped IP addresses.
See the "Mapped Addresses and Routing" section on
page 1-19 for more information.
Cisco ASA Series CLI Configuration Guide
Configuring Network Object NAT
Step 1).
1-3.
1-28. This option is
1-13