NAT: Local and Global Definitions

Ξ May 23rd, 2006 | → 1 Comments | ∇ NAT, Technology |

Term Definitions

Cisco defines these terms as follows:

  • Inside local address – The IP address assigned to a host on the inside network. This is the address configured as a parameter of the computer’s OS or received via dynamic address allocation protocols such as DHCP. The address is likely not a legitimate IP address assigned by the Network Information Center (NIC) or service provider.
  • Inside global address – A legitimate IP address assigned by the NIC or service provider that represents one or more inside local IP addresses to the outside world.
  • Outside local address – The IP address of an outside host as it appears to the inside network. Not necessarily a legitimate address, it is allocated from an address space routable on the inside.
  • Outside global address – The IP address assigned to a host on the outside network by the host’s owner. The address is allocated from a globally routable address or network space. (more…)