0.0.0.0/0 0::0/0

You didn’t specify it couldn’t be in CIDR block notation…

Ok. This covers every ipv6 and ipv4 address.

“^\s*((([0-9A-Fa-f]1,4}:){7}([0-9A-Fa-f]{1,4}:))|(([0-9A-Fa-f]{1,4:)6}(:[0-9A-Fa-f]{1,4}((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3)|:))|(([0-9A-Fa-f]1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2}):((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3)|:))|(([0-9A-Fa-f]1,4}:){4}(((:[0-9A-Fa-f]{1,4}){1,3})((:[0-9A-Fa-f]{1,4)?:((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9]))3})):))|(([0-9A-Fa-f]{1,4:)3}(((:[0-9A-Fa-f]{1,4}){1,4})((:[0-9A-Fa-f]{1,4)0,2}:((25[0-5]2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3))|:))|(([0-9A-Fa-f]1,4}:){2}(((:[0-9A-Fa-f]{1,4}){1,5})((:[0-9A-Fa-f]{1,4)0,3}:((25[0-5]2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3))|:))|(([0-9A-Fa-f]1,4}:){1}(((:[0-9A-Fa-f]{1,4}){1,6})((:[0-9A-Fa-f]{1,4)0,4}:((25[0-5]2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3))|:))|(:(((:[0-9A-Fa-f]1,4}){1,7})((:[0-9A-Fa-f]{1,4)0,5}:((25[0-5]2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3))|:)))(%.+)?\s*$”

:00 - :ff

Edit: Just learnt this can be also noted as:

:: - ::f