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

[Alessandro Carettoni <address@concealed>]

Hi Stefan,

Thanks, we managed to resolve the issue by uploading the correct certificate this morning. Thanks again for your help.

Have a good evening.

 

Alessandro Carettoni

 

Da: 'Stefan Paetow' via Sistemi <address@concealed>
Inviato: mercoledì 23 settembre 2026 15:57
A: Alessandro Carettoni <address@concealed>; address@concealed
Cc: Leopoldo Piedimonte <address@concealed>; Sistemi <address@concealed>; address@concealed
Oggetto: Re: [[cat-users]] Eduroam network configuration problems

 

Alessandro,

 

GARR has a copy of the 2021 HARICA certificate, and you can download it from them (and then modify your CAT profiles by uploading it into each of the two profiles). If you need access to eduroam CAT, you should contact GARR who can provide access. GARR has been copied in for your convenience. 

 

Kind regards

 

Stefan Paetow

Federated Roaming Technical Specialist

eduroam(UK), Jisc – 20 years of free Wi-Fi for the UK R&E sector

 

email/teams: address@concealed

gpg: 0x3FCE5142

 

For eduroam support, please contact the eduroam team via address@concealed and mark it for eduroam’s attention.

I am not available on Mondays and Fridays between 12:00 and 15:00 London time (UTC in winter, UTC+0100 in summer).

 

Note: I don’t expect a reply outside of your working hours, since I work internationally with colleagues in different nationalities with different religions, customs, and holidays. Reply when it is convenient for you.

 

Jisc is a registered charity (in England and Wales under charity number 1149740; in Scotland under charity number SC053607) and a company limited by guarantee registered in England under company number 05747339, VAT number GB 197 0632 86. Jisc's registered office is: 4 Portwall Lane, Bristol, BS1 6NB. T 0203 697 5800.

 

Jisc Services Limited is a wholly owned Jisc subsidiary and a company limited by guarantee which is registered in England under company number 02881024, VAT number GB 197 0632 86. The registered office is: 4 Portwall Lane, Bristol, BS1 6NB. T 0203 697 5800.

 

For more details on how Jisc handles your data see our privacy notice here: https://www.jisc.ac.uk/website/privacy-notice

 

From: Alessandro Carettoni <address@concealed>
Date: Wednesday, 23 September 2026 at 08:35
To: Stefan Paetow <address@concealed>; address@concealed <address@concealed>
Cc: Leopoldo Piedimonte <address@concealed>; Sistemi <address@concealed>
Subject: R: [[cat-users]] Eduroam network configuration problems

Good morning Stefan, thank you for your reply.

How can I retrieve the correct certificate for the IULM Student Eduroam profile?

 

Thank you

 

Alessandro

 

 

 

Da: Stefan Paetow <address@concealed>
Inviato: martedì 22 settembre 2026 19:36
A: Alessandro Carettoni <address@concealed>; address@concealed
Oggetto: Re: [[cat-users]] Eduroam network configuration problems

 

Ciao Alessandro, 

 

It looks like your certificate chain is incorrect:

 

TLS: Certificate verification failed, error 19 (self signed certificate in certificate chain) depth 2 for '/C=GR/O=Hellenic Academic and Research Institutions CA/CN=HARICA TLS RSA Root CA 2021'

CTRL-EVENT-EAP-TLS-CERT-ERROR reason=1 depth=2 subject='/C=GR/O=Hellenic Academic and Research Institutions CA/CN=HARICA TLS RSA Root CA 2021' err='self signed certificate in certificate chain'

EAP: Status notification: remote certificate verification (param=self signed certificate in certificate chain)

OpenSSL: TX ver=0x0 content_type=256 (TLS header info/)

OpenSSL: Message - hexdump(len=5): 15 03 03 00 02

OpenSSL: TX ver=0x303 content_type=21 (alert/)

OpenSSL: Message - hexdump(len=2): 02 30

SSL: (where=0x4008 ret=0x230)

SSL: SSL3 alert: write (local SSL3 detected an error):fatal:unknown CA

EAP: Status notification: local TLS alert (param=unknown CA)

SSL: (where=0x1002 ret=0xffffffff)

SSL: SSL_connect:error in error

OpenSSL: openssl_handshake - SSL_connect error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed

 

One of your profiles contains the 2015 root of HARICA, the other a USERTrust CA certificate, so yes, once you renewed your certificates, things stopped working.  Your server serves the correct certificate, but your CAT profiles (which is what geteduroam uses) are outdated.

 

So, update both your eduroam CAT profiles on eduroam CAT with the 2021 version of the HARICA certificate, and tell your students to reconfigure their devices and everything will work again.

 

Kind regards

 

Stefan Paetow

Federated Roaming Technical Specialist

eduroam(UK), Jisc – 20 years of free Wi-Fi for the UK R&E sector

 

email/teams: address@concealed

gpg: 0x3FCE5142

 

For eduroam support, please contact the eduroam team via address@concealed and mark it for eduroam’s attention.

I am not available on Mondays and Fridays between 12:00 and 15:00 London time (UTC in winter, UTC+0100 in summer).

 

Note: I don’t expect a reply outside of your working hours, since I work internationally with colleagues in different nationalities with different religions, customs, and holidays. Reply when it is convenient for you.

 

Jisc is a registered charity (in England and Wales under charity number 1149740; in Scotland under charity number SC053607) and a company limited by guarantee registered in England under company number 05747339, VAT number GB 197 0632 86. Jisc's registered office is: 4 Portwall Lane, Bristol, BS1 6NB. T 0203 697 5800.

 

Jisc Services Limited is a wholly owned Jisc subsidiary and a company limited by guarantee which is registered in England under company number 02881024, VAT number GB 197 0632 86. The registered office is: 4 Portwall Lane, Bristol, BS1 6NB. T 0203 697 5800.

 

For more details on how Jisc handles your data see our privacy notice here: https://www.jisc.ac.uk/website/privacy-notice

 

 

From: address@concealed <address@concealed> on behalf of Alessandro Carettoni <address@concealed>
Date: Tuesday, 22 September 2026 at 16:43
To: address@concealed <address@concealed>
Subject: [[cat-users]] Eduroam network configuration problems

 

Good evening, I am writing to report that since yesterday, students have been unable to configure the Eduroam network using the geteduroam application.

There have been no changes to the portal configuration on the IULM side, and we are unable to identify the source of the problem.

Could you please advise us on how to resolve this? Thank you, and have a good evening.

 

 

Alessandro Carettoni

 

 

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