Specifications

Configuring NAT
September 08, 2010 Page 11 of 18
Configuring Traditional NAT Static Inside Address Translation
Procedure 1describeshowtoconfiguretraditionalNATforastaticconfiguration.
Configuring Traditional NAT Dynamic Inside Address Translation
Procedure 2describeshowtoconfiguretraditionalNATforadynamicconfiguration.
Managing a Traditional NAT Configuration
Table 3describeshowtomanagetraditionalNATconfigurations.
Procedure 1 Traditional NAT Static Configuration
Step Task Command(s)
1. Enable NAT on all interfaces on which
translation takes place for both the internal and
external networks.
ip nat {inside | outside}
2. Enable any static NAT translations of inside
source addresses.
ip nat inside source static local-ip global-ip
3. Enable any static NAPT translations of inside
source addresses, specifying whether the L4
port is a TCP or UDP port.
ip nat inside source static {tcp | udp}
local-ip local-port global-ip global-port
Procedure 2 Traditional NAT Dynamic Configuration
Step Task Command(s)
1. Enable NAT on all interfaces on which
translation takes place for both the internal and
external networks.
ip nat {inside | outside}
2. Define an access-list of permits for all inside
addresses to be used by this dynamic
translation.
access-list list-number {deny | permit}
source
3. Define a NAT address pool for all outside
addresses to be used by this dynamic
translation.
ip nat pool name start-ip-address
end-ip-address {netmask netmask |
prefix-length prefix-length}
4. Enable dynamic translation of inside source
addresses. Specify the overload option for
NAPT translations. Optionally specify an outside
interface VLAN.
ip nat inside source [list access-list] pool
pool-name [overload | interface vlan vlan-id
[overload]]
Table 3 Managing a Traditional NAT Configuration
Task Command(s)
Optionally specify a non-default NAT FTP control port. ip nat ftp-control-port port-number
Configure the maximum number of translation entries. ip nat translation max-entries number