Query on UDP proxy socket using freeradius version 3.0.16

[Saurabh]

Hi,

Sorry i may missed to present the problem to you.

 I am a user of freeradius last 10 years since 2.0.12.

We deployed freeradius as client which receives radius message from UE/AP
and proxy that to external AAA for auth and acct. You think it's 100
messages per second.

Facing one customer issue where even though udp socket is open and serving
request to a AAA on a source port, observed a new port is open to same AAA.

My doubt is why a new socket with a new port to same AAA even if there is a
one already. This behavior seen sometime not always.



Thanks,
Saurabha

On Fri, 16 Jun 2023, 20:13 Alan DeKok, <aland at deployingradius.com> wrote:

> On Jun 16, 2023, at 10:34 AM, saurabha badhai <saurabha.badhai at gmail.com>
> wrote:
> >
> > Thanks for your answer. Few more doubts on your answer when freeradius
> run
> > as client and proxying packet. AAA I refer to the server here.
>
>   Most of your concerns are dealing with basic Unix operation, not with
> FreeRADIUS.
>
> > When port change happens at freeradius as client for the same AAA ? If
> > freeradius client say suppose bind to 26001 and authentication happens,
> > then why will it change to another port say suppose 26002 or any other
> port
> > even though first port (26001) is open and serving. Is this because of
> high
> > load or any thing as such ?
>
>   I don't understand the question.  I think you're confused about a bunch
> of things, and can't explain things clearly.
>
>   Both a RADIUS client and server can run on the same machine at the same
> time.  It's fine.  If you want to know why, you can read a book on "Unix
> networking 101".  All of this is explained extensively in various
> documentation about networking.
>
>   i.e. none of this has anything to do with RADIUS or FreeRADIUS.
>
> > Can all threads use the same AAA port when thousands of messages get
> served
> > or multiple ports opened at the same time ?
>
>   You can read the source code.
>
>   In general, you don't need to know this information.  If you're
> modifying the source code, then go read the source code.
>
>   If you're just administering a RADIUS server, then you don't need to
> know the details.  It works, it's fine.
>
>   If you still care about the details, even though you're just running the
> server, then you can go read the source code.  It's not productive for me
> to explain all of the internal implementation details and design.
>
>   This list isn't a place to learn about Unix networking.  That
> information is documented extensively elsewhere on the net.
>
>   Alan DeKok.
>
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