<ipv4> | <ipv6> | <name>

Where:
  <name> = Any valid domain/host name
  <ipv4> = Any valid IPv4 address
  <ipv6> = Any valid IPv6 address

Examples:
  127.0.0.1
  [::1]
  [2600:1417:6000:198::255e]
  localhost
  www.example.com
