DHCP reply not leaving machine

[Rok Kosir]

On 10/25/2013 05:47 PM, freeradius-users-request at lists.freeradius.org wrote:
>
>    The server*thinks*  it's sending the packet.  Is there a FW rule
> preventing DHCP from leaving the box?

iptables are  empty, i have completely removed ufw and apparmor, no 
change detected

>
>    Can you use gdb to track down what's going on?  Maybe the send() call
> is silently failing?

when using gdb i once got this error:

Sending DHCP-Offer of id 406a7a14 from 255.255.255.255:67 to 
192.168.0.102:68
(5) Finished request 5.
Waking up in 0.3 seconds.
Waking up in 1.6 seconds.
(3) Cleaning up request packet ID 3771922810 with timestamp +17
Waking up in 0.2 seconds.
ASSERT FAILED src/main/process.c[498]: 0 == 1

Program received signal SIGABRT, Aborted.
0x00007ffff674b425 in raise () from /lib/x86_64-linux-gnu/libc.so.6


The error doesn't happen always, so i'm not sure if it's connected to 
dhcp problem.
i have tried different scenarios, direct cable connection, connection 
via switch, same result..
When I manually set IP on dhcp client machine it was able to ping/ssh 
the radius server.

I have no idea what i could try next
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