Securing RADIUS Communication
RADIUS authentication requires HTTP basic authentication (according to RFC 2617). However, this is insecure as the usernames and passwords are transmitted in clear text over plain HTTP. Thus, as digest authentication is not supported with RADIUS, it is recommended that you use HTTPS with RADIUS so that the usernames and passwords are encrypted. To enable the device to use HTTPS, configure the 'Secured Web Connection (HTTPS)' parameter to HTTPS Only (see Configuring Secured (HTTPS) Web).