Freeradius process crash receiving answers from Microsoft NPS Server

Jeff Doyle j at
Sat Nov 12 22:31:02 CET 2011

Stop the freeradius process and then run freeradius in debug mode


/etc/init,d/freeradius stop

and then

freeradius -Xx

Freeradius will now be in debug mode in the FOREGROUND (not daemon/background)

Attempt your authentication from MS Radius

Observe the log output from your foreground session.

Reply to this thread with output (copy/paste).  We can then analyze the freeradius-specific output and possibly discern your problem(s) .....


On Nov 12, 2011, at 1:35 PM, IT Support wrote:

> Good afternoon
> I'm a newbie with freeradius and I'm trying to configure a radius
> proxy server that makes to a server microsoft radius nps.
> I have a Enterasys C3 switch that sends auth requests to my
> Freeradius. If the request is for auth a MAC the FR auth locally, but
> if  the request is for auth a windows user (EAP) the FR resend the
> request to the Microsoft NPS radius server.
> I use Debian 6.0 and the debian package of FR (version is 2.1.10).
> The problem is that when the Microsoft RADIUS server returns an accept
> packet, the freeradius server process dies. But if the answer is
> reject, the process works properly.
> When the process dies, only appears in the syslog the following line:
> "November 11 16:20:35 debian-radius kernel: [2380.591594] freeradius
> [1749]: segfault at 3934c708 b76fd497 ip sp error 4 in libfreeradius
> [+1 b76ec000 E000]"
> Can anyone help me?
> Sorry for my poor English.
> Best greetings
> Toni
> -
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