Thanks Tony Your link led to this page which I think makes it clear that all ::ffff:x.x.x.x IPv4-mapped Address should not be seen at all on the internet.
https://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-specia l-registry.xhtml BTW I did spot a typo after (sigh) I pushed the send button on the user list update 169.256... should of course be 169.254... And yes the private-address: 192.254.0.0/16 was another one - sorry I will update the list with the proper items. Looks like from line 7 on the above iana page shows that 2001::/23 should perhaps be the entry as it show False across the page unless you have some need for the addresses So the definitive list as it stands at the moment (with typo's corrected I hope) is: # IPv4 Addresses # private-address: 0.0.0.0/8 # Broadcast address private-address: 10.0.0.0/8 private-address: 100.64.0.0/10 private-address: 127.0.0.0/8 # Loopback Localhost private-address: 169.254.0.0/16 private-address: 172.16.0.0/12 private-address: 192.0.0.0/24 # IANA IPv4 special purpose net private-address: 192.0.2.0/24 # Documentation network TEST-NET private-address: 192.168.0.0/16 private-address: 198.18.0.0/15 # Used for testing inter-network communications private-address: 198.51.100.0/24 # Documentation network TEST-NET-2 private-address: 203.0.113.0/24 # Documentation network TEST-NET-3 private-address: 233.252.0.0/24 # Documentation network MCAST-TEST-NET # #private-address: 239.0.0.0/24 # GRC Version control do not enable apart from for testing. # # IPv6 Addresses # # https://tools.ietf.org/html/rfc5156 # private-address: ::/128 # Unspecified address IPV4 0.0.0.0 http://www.iana.org/go/rfc4291 private-address: ::1/128 # Loopback Localhost http://www.iana.org/go/rfc4291 private-address: 2001::/23 # IETF Protocol Assignments http://www.iana.org/go/rfc2928 private-address: 2001:db8::/32 # Documentation network IPv6 http://www.iana.org/go/rfc3849 private-address: 2001:2::/48 # is reserved for Benchmarking http://www.iana.org/go/rfc5180 http://www.rfc-editor.org/errata_search.php?eid=1752 private-address: fc00::/7 # Unique local address (ULA) part of "fc00::/7", not defined yet private-address: fd00::/8 # Unique local address (ULA) part of "fc00::/7", "/48" prefix group private-address: fe80::/10 # Link-local address (LLA) = 169.254.0.0/16 private-address: ::ffff:0:0/96 # IPv4-mapped Address http://www.iana.org/go/rfc4291 Any updates comments appreciated. Ray
