On Sep 29, 2022, at 7:17 AM, Imdad Hasan <imdadalikadiwala0@gmail.com> wrote:

i am receiving an error about conflict packet like

*Error: Received conflicting packet from client NAS1 port 53433 - ID: 194 due to unfinished request in module <queue>. Giving up on old request.*

1.) At this time my radius server hangs and takes 100% CPU. 2.) From some time the linux kernel is taking 30% CPU constantly.

I am using ubuntu-server 20.04 with freeradius 3.0.20.

You should use 3.2.0, but that won't help. The problem is almost definitely your database. Read the *rest* of the messages in the log files. You will likely see messages about "module sql became unblocked" or "module sql is unresponsive"/ Something else is blocking the server, and is preventing it from doing work. It is almost always something like a database. Or maybe a slow Perl module, or even you're exec'ing complicated scripts. If you put a name and password into the "users" file, FreeRADIUS can handle 40K packets/s. So if your local site can't handle 100 packets/s, then it's something broken in your local system. Alan DeKok.