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RFC 1918 – Address Allocation for Private Internets; RFC 2036 – Observations on the use of Components of the Class A Address Space within the Internet; RFC 7020 – The Internet Number Registry System; RFC 2101 – IPv4 Address Behaviour Today; RFC 2663 – IP Network Address Translator (NAT) Terminology and Considerations
Private network Shared address space [4] for communications between a service provider and its subscribers when using a carrier-grade NAT: 127.0.0.0/8
Most network address translators map multiple private hosts to one publicly exposed IP address. Here is a typical configuration: A local network uses one of the designated private IP address subnets (RFC 1918 [4]). The network has a router having both a private and a public address.
RFC 1918 : Address Allocation for Private Internets: February 1996: Private network: RFC 1928 : SOCKS Protocol Version 5: March 1996: SOCKS5: RFC 1939 : Post Office Protocol - Version 3: May 1996: POP v 3: RFC 1945 : Hypertext Transfer Protocol—HTTP/1.0: May 1996: HTTP v 1.0: RFC 1948 : Defending Against Sequence Number Attacks: May 1996: IP ...
Starting 1991-06-01, was used to map Public Data Network addresses to IP addresses. Returned to IANA 2008-01-22. This network was reclaimed by IANA in 2007 and was subsequently re-allocated in 2010. See RFC 877 and RFC 1356 for historical information. [10] 15.0.0.0/8 ARIN: 1991-09 Various registries (maintained by ARIN).
With IPv4, commonly home networks use private addresses (defined in RFC 1918) that are non-routable on the public Internet and use address translation to convert to routable addresses when connecting to hosts outside the local network. Business networks typically had manually provisioned subnetwork prefixes.
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 ...
If an ISP deploys a CGN and uses private Internet address space [2] (networks 10.0.0.0 / 8, 172.16.0.0 / 12, 192.168.0.0 / 16) to connect their customers, there is a risk that customer equipment using an internal network in the same range will stop working.