Draytek VIGOR2860 series User Manual page 216

Available settings are explained as follows:
Item
Enable
Authentication Port
RADIUS Client Access List
200
Description
Check to enable internal RADIUS client feature.
Set a port number for internal RADIUS server.
Allow to configure that clients under specified domain (IPv4
and IPv6) must be authenticated with the specified shared
secret.
Enable - Check to enable RADIUS client feature.
Shared Secret - The RADIUS server and client share a secret
that is used to authenticate the messages sent between
them. Both sides must be configured to use the same shared
secret. The maximum length of the shared secret you can set
is 36 characters.
IP Address – Type the IP addres of the wired/wireless
client.
IP Mask – Type the subnet mask required for the IP address.
IPv6 Address – Type the IPv6 address of the wired/wireless
client.
IPv6 Length - Type the prefix length required for the IPv6
Vigor2860 Series User's Guide