The mailing list for users of the eduroam Configuration Assistant Tool (CAT)

[Óscar Remírez De Ganuza Satrústegui <address@concealed>]

Hello,

Yes, we have detected similar authentication issues with "special characters" in passwords (not just with "€" character ) from Windows supplicants.

Characters with problems: ¿ & á é í ó ú ...

To be honest, we have no great feedback to share on how to solve this problem, but not to use those characters in passwords.

Regards,

On Wed, Sep 17, 2025 at 11:08 AM Philippe Taurines <address@concealed> wrote:

Hello,

 

We are experiencing an authentication issue with Windows 11 clients when the user's password contains the character "€".

 

We have observed the following behavior with a FreeRADIUS server and MSCHAPv2 authentication:

 

1. Windows 11 client: Connection fails if the password contains a "€".

2. Android client: Connection works, even if the password contains a "€".

3. Windows 11 client (without a "€"): Connection works.

4. Android client (without a "€"): Connection works.

 

What seems even more surprising to me is when configuring the Windows supplicant with cat-eduroam, analyzing the connection logs on the radius servers:

 

1. With an invalid password and without the "€" symbol, the client's connection attempt is clearly visible in the radius server logs.

2. With an invalid password and the "€" symbol, the client's connection attempt is not visible in the radius server logs.

3. With a valid password and the "€" symbol, the client's connection attempt is not visible in the radius server logs.

4. With a valid password and without the "€" symbol, the client's connection attempt is visible in the radius server logs.

 

This behavior suggests that the problem lies with the Windows supplicant.

 

Have you ever encountered a similar problem or do you have any feedback to share on this issue?

 

Are there any other characters you know of that might not be well supported?

 

Sincerely,

--

---

Oscar Remírez de Ganuza Satrústegui
Technology and IT Operations
IT Services

T: +34 948425600 x803130
address@concealed

---

Este mensaje puede contener información confidencial. Si usted no es el destinatario o lo ha recibido por error, por favor, bórrelo de sus sistemas y comuníquelo a la mayor brevedad al remitente. Los datos personales incluidos en los correos electrónicos que intercambie con el personal de la Universidad de Navarra podrán ser almacenados en la libreta de direcciones de su interlocutor y/o en los servidores de la Universidad durante el tiempo fijado en su política interna de conservación de información. La Universidad de Navarra gestiona dichos datos con fines meramente operativos, para permitir el contacto por email entre sus trabajadores/colaboradores y terceros. Puede consultar la Política de Privacidad de la Universidad de Navarra en la dirección: https://www.unav.edu/aviso-legal

 

This email message may contain confidential information. If you are not the intended recipient of this message or their agent, or if this message has been addressed to you in error, please immediately alert the sender by reply email and then delete this message and any attachments.  The personal information included in email messages exchanged with employees of the University of Navarra may be stored in the database of your interlocutor and/or the servers of the University for the time-period stipulated by its internal information storage policy. The University stores such data for purely administrative purposes, to facilitate e-mail contact between its employees and third parties. The University of Navarra Privacy Policy may be accessed at https://www.unav.edu/aviso-legal      

 

Antes de imprimir este mensaje o sus documentos anexos, asegúrese de que es necesario. Proteger el medio ambiente está en nuestras manos.
Before printing this e-mail or attachments, be sure it is necessary. It is in our hands to protect the environment.