All IP Ranges in IPv4 and IPv6
0.0.0.0/0 is the IPv4 everything – all possible IPv4 addresses.
::/0 is the IPv6 equivalent of that.
It should be noted that depending on implementation ::/0 can mean either all IPv6 addresses or all IPv4 and IPv6 addresses. That’s because IPv4 addresses can be mapped into IPv6 addresses ::ffff:0:0/96