Rather than accidentally encouraging people to connect to random, possibly live IP addresses, we should use the addresses specifically set aside for the purpose of documentation.
The blocks 192.0.2.0/24 (TEST-NET-1), 198.51.100.0/24 (TEST-NET-2), and 203.0.113.0/24 (TEST-NET-3) are provided for use in documentation.
Obviously, using internal addresses (192.168.0.0/16, 172.16.0.0/12, 10.0.0.0/8, fc00::/7) as examples for internal IPs are fine as they'll never reach outside the internal network...allegedly.
pirate
commented
5 years ago
Rather than accidentally encouraging people to connect to random, possibly live IP addresses, we should use the addresses specifically set aside for the purpose of documentation.
RFC3849 states the following for IPv6:
RFC5737 states the following for IPv4:
Obviously, using internal addresses (192.168.0.0/16, 172.16.0.0/12, 10.0.0.0/8, fc00::/7) as examples for internal IPs are fine as they'll never reach outside the internal network...allegedly.