IP Addresses

The IP can be IPv4 address like, IPv6 address without brackets like ::1, or with brackets like [::1]. The DNS name is looked up once during config parsing, e.g. host.example.com. If a /block is specified, then it’s a CIDR address like If a /block isn’t specified, then it defaults to all bits, i.e. /32 for IPv4 addresses and /128 for IPv6 addresses.