Implementing NAT

To implement NAT in your network:

• Enable NAT on both the inside (local) and outside (public) interfaces to be used for translation
• If you intend to use inside source address dynamic translation (see Dynamic Address Translations for details):
  • Define an access-list of inside addresses
  • Define a NAT address pool of outside addresses
  • Enable dynamic translation of inside addresses specifying an access-list of inside addresses and a NAT address pool of outside addresses
    • - Optionally specify a NAT cone method along with an access list specifying the protocols and ports to cone
  • Optionally configure IPv4 overload for NAPT (defaults to NAT)
  • Optionally specify the interface to which translations are applied
• If you intend to use inside source address static translation (see Static Address Translation for details), enable inside source address static translation in the appropriate NAT or NAPT context
  • Optionally specify a NAT cone method along with an access list specifying the protocols and ports to cone
• Optionally change the NAT FTP control port from its default of 21
• Optionally modify maximum allowed entries and NAT translation timeout values