set localIPPrefix "::ffff:"
		}
		v6 {
			set urls {
				http://ipv6.rkeene.org/whatismyip
				http://ifconfig.co/
			}
			set urls {
				http://api.ipify.org/
			}

			set localIPPrefix ""
		}
		default {
			return -code error "version must be \"v4\" or \"v6\""
		}
	}