Please enable JavaScript.
Coggle requires JavaScript to display documents.
NAT for IPv4, image - Coggle Diagram
NAT for IPv4
Dynamic NAT Scenario
These inside global addresses are typically public IPv4 addresses. Dynamic NAT, like static NAT, requires the configuration of the inside and outside interfaces participating in NAT with the ip nat inside and ip nat outside interface configuration commands. However, where static NAT creates a permanent mapping to a single address, dynamic NAT uses a pool of addresses.
-
Verify Dynamic NAT
The output of the show ip nat translations command displays all static translations that have been configured and any dynamic translations that have been created by traffic.
-
What is NAT
NAT has many uses, but its primary use is to conserve public IPv4 addresses. It does this by allowing networks to use private IPv4 addresses internally and providing translation to a public address only when needed.
-
Verify Static NAT
To verify NAT operation, issue the show ip nat translations command. This command shows active NAT translations. Because the example is a static NAT configuration, the translation is always present in the NAT table regardless of any active communications.
Another useful command is show ip nat statistics, which displays information about the total number of active translations, NAT configuration parameters, the number of addresses in the pool, and the number of addresses that have been allocated.
Static NAT
Is particularly useful for web servers or devices that must have a consistent address that is accessible from the internet, such as a company web server.
Dynamic NAT
Uses a pool of public addresses and assigns them on a first-come, first-served basis. When an inside device requests access to an outside network, dynamic NAT assigns an available public IPv4 address from the pool.
Port Address Translation
maps multiple private IPv4 addresses to a single public IPv4 address or a few addresses. This is what most home routers do. The ISP assigns one address to the router, yet several members of the household can simultaneously access the internet.
-
NAT64
NAT for IPv6?
Las direcciones IPv6 locales únicas (ULA) se asemejan a las direcciones privadas en IPv4 definidas en RFC 1918, pero con un propósito distinto. Las direcciones ULA están destinadas únicamente a las comunicaciones locales dentro de un sitio. Las direcciones ULA no están destinadas a proporcionar espacio de direcciones IPv6 adicional ni a proporcionar un nivel de seguridad.
-
