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Carrier-grade NAT. Carrier-grade NAT (CGN or CGNAT), also known as large-scale NAT (LSN), is a type of network address translation (NAT) used by ISPs in IPv4 network design. With CGNAT, end sites, in particular residential networks, are configured with private network addresses that are translated to public IPv4 addresses by middlebox network address translator devices embedded in the network ...
In order to ensure proper working of carrier-grade NAT (CGN), and, by doing so, alleviating the demand for the last remaining IPv4 addresses, a / 10 size IPv4 address block was assigned by Internet Assigned Numbers Authority (IANA) to be used as shared address space. [1]
In effect, it is an (almost) stateless alternative to carrier-grade NAT and DS-Lite that pushes the IPv4 address/port translation function (and the maintenance of NAT state) entirely into the existing customer premises equipment NAT implementation.
Dedicated space for carrier-grade NAT deployment. In April 2012, IANA allocated the 100.64.0.0 ... (Traditional NAT) RFC 3330 – Special-Use IPv4 Addresses ...
In effect, MAP is an (almost) stateless alternative to Carrier-grade NAT and DS-Lite that pushes the IPv4 IP address/port translation function (and therefore the maintenance of NAT state) entirely into the existing customer premises equipment IPv4 NAT implementation, thus avoiding the NAT444 and statefulness problems of carrier-grade NAT.
Shared address space [4] for communications between a service provider and its subscribers when using a carrier-grade NAT 127.0.0.0/8 127.0.0.0–127.255.255.255
Various NAT traversal techniques have been developed: NAT Port Mapping Protocol (NAT-PMP) is a protocol introduced by Apple as an alternative to IGDP. Port Control Protocol (PCP) is a successor of NAT-PMP. UPnP Internet Gateway Device Protocol (UPnP IGD) is supported by many small NAT gateways in home or small office settings. It allows a ...
Carrier-grade NAT; I. Internet Gateway Device Protocol; IPv6-to-IPv6 Network Prefix Translation; N. NAT Port Mapping Protocol; NAT traversal; P. Port Control Protocol;