Radiusdesk & Coova-chilli & & Freeradius - Authentication failure

[Forrest-It]

Following the instructions on https://radiusdesk.com/wiki24/install_22_4 and https://radiusdesk.com/wiki24/install_22_4_coova I want to create a captive portal for a school wifi network.

The captive portal also intercepts the request by redirecting to the RadiusDesk login page, but authentication fails. Analyzing the freeradius log with the
freeradius -x command, even if the clear text password is correctly received by the same,

(40) pl_logintime: $RAD_CONFIG{'Cleartext-Password'} = &control:Cleartext-Password -> 'my-clear-text-password'

in

****0) pl_logintime: $RAD_REQUEST{'User-Password'} = &request:User-Password -> '???fd?U G???%5?1'

the password appears to be heavily altered, resulting in freeradius rejecting it and i get the follow error:

(0) pap: ERROR: Cleartext password does not match "known good" password
(0) pap: Passwords don't match

I tried to use a captive portal created with OpenWrt and Coova-chilli with the same radiusdesk&freeradius: authentication occurs correctly.

Has anyone of you had a similar problem?

[Forrest-It]

Solved !