Troubleshooting "TLS failed during operation" with EAP-TLS

Michael Parks mparks at
Fri Jun 5 17:54:15 CEST 2020

I think I might need to try with different certs. I've read rumblings that MikroTik's built-in PKI can cause strange problems in other instances, and it may be the same thing here. (Supposedly it's perfectly standard X509, but..)

Anything a mere mortal with little C experience can do to get better info as to the failure cause?

On Fri, Jun 5, 2020, at 6:21 AM, Alan DeKok wrote:
> On Jun 4, 2020, at 11:17 PM, Michael Parks <mparks at> wrote:
> > 
> > No change it seems.
>   Hmm... that's harder to tell them.
>   The issue is that the function tls_handshake_recv() is returning 0, 
> but isn't printing a message saying why.  You'll have to instrument the 
> code to see.
>   I've seen other issues with iPhones getting connected.  But never this.
>   Alan DeKok.
> -
> List info/subscribe/unsubscribe? See

More information about the Freeradius-Users mailing list