RFCs Discussing Special Use IP Addresses for Routing Prefixes

AB.

RFCs (Request for Comments) are documents published by the Internet Engineering Task Force (IETF) that describe protocols, procedures, and technologies used on the internet. Two current RFCs discuss special use IP addresses that may be used as a checklist of invalid routing prefixes for IPv4 and IPv6 addresses. These are:

B. RFC 5735: Special Use IPv4 Addresses

This RFC describes IPv4 addresses that have been reserved for special purposes and should not be used on the public internet. These addresses include:

• 10.0.0.0/8: Used for private networks
• 172.16.0.0/12: Used for private networks
• 192.168.0.0/16: Used for private networks
• 127.0.0.0/8: Used for loopback addresses
• 169.254.0.0/16: Used for link-local addresses
• 192.0.0.0/24: Used for the IANA IPv4 Special Purpose Address Registry
• 192.0.2.0/24: Used for documentation and examples
• 198.51.100.0/24: Used for documentation and examples
• 203.0.113.0/24: Used for documentation and examples

These addresses are reserved for specific purposes and should not be used as public addresses. They are commonly used in private networks, such as those found in homes or businesses.

A. RFC 5156: Special-Use IPv6 Addresses

This RFC describes IPv6 addresses that have been reserved for special purposes and should not be used on the public internet. These addresses include:

• ::1/128: Used for loopback addresses
• ::/128: Used for unspecified addresses
• ::ffff:0:0/96: Used for IPv4-mapped IPv6 addresses
• 64:ff9b::/96: Used for IPv6/IPv4 translation
• 100::/64: Used for discard-only addresses
• 2001:2::/48: Used for benchmarking
• 2001:db8::/32: Used for documentation and examples
• fc00::/7: Used for unique local addresses
• fe80::/10: Used for link-local addresses

These addresses are reserved for specific purposes and should not be used as public addresses. They are commonly used in private networks or for specific purposes, such as documentation and examples.

C. RFC 3330: Special-Use IPv4 Addresses (Obsoleted)

This RFC described IPv4 addresses that have been reserved for special purposes and should not be used on the public internet. It has been obsoleted by RFC 5735, but it is still sometimes referenced.

D. RFC 1918: Address Allocation for Private Internets

This RFC described the allocation of IPv4 addresses for use in private networks. It predates RFC 5735 and is not specifically focused on invalid routing prefixes.

E. RFC 2827: Network Ingress Filtering: Defeating Denial of Service Attacks which employ IP Source Address Spoofing

This RFC describes techniques for preventing denial-of-service (DoS) attacks that use IP address spoofing. It does not discuss special use IP addresses.

In conclusion, the two current RFCs that discuss special use IP addresses that may be used as a checklist of invalid routing prefixes for IPv4 and IPv6 addresses are B. RFC 5735 and A. RFC 5156.