Wifi Network Authentication

Wifi Access Point should be guarded and it is not recommended to disable network authentication. There are  options without server authentication like WPA-PSK (Pre-Sharred Key, or also WPA-home), or with Radius server like WPA or IEEE802.1x. Default radius port is 1812. Such server would need dedicated IP address, because most network devices would refer to it by IP address and not by domain name. Many APs now come with integrated Authentication Servers (AS) which act as RADIUS servers, so it is not necessary to  install and operate RADIUS server. Price range is about $200, see for example USR5453 Professional Access Point, ZyXEL G-2000 Plus, etc.