Beginner need help (unrecognized clients)

Frank Wei Frank.Wei at
Mon Sep 29 07:09:58 CEST 2014

Dear friends,

I have added clients

client private-network-1 {
                      ipaddr          =
                      netmask         = 24
                      secret          = testing123-1
                      shortname       = private-network-1

To the clients.conf.

And run command "radius -X". From the debug message I can see the added client loaded.

Then from my NAS (with IP I sent a "authentication only" request to the server. The server showed me a message:

Ignored,.....Unrecognized client "" port "1222".

What is wrong with my config?


-----Original Message-----
From: at [ at] On Behalf Of A.L.M.Buxey at
Sent: Thursday, 25 September 2014 6:49 p.m.
To: FreeRadius users mailing list
Subject: Re: Beginner need help


> My understanding is that source IP address of the Access-Request packets must be the NAS IP address which is "NAS-IP-Address". Apparently this is different to the Attribute description.
> Could anybody explain?


the NAS-IP-Address is set by the NAS - so it SHOULD be its IP address in a nice world. okay
thats clear....however, the packet might be reaching your RADIUS server via some other
route - lets say, eg a NAT gateway, a RADIUS server (it has been proxied) or from some
central controller (thinking of some of the WiFi solutions out there) - in which case
the NAS-IP-Address is NOT the source IP address of the packet.

the NAS-IP-Address is also part of the RADIUS datagram - so you've already started to
analyse the packet contents really before you can - eg how did you ensure the packet
contents were correct, verify the message authenticator or ensured the content values
by using the shared secret?  you didnt.

the RADIUS datagram comes in. you see the source address of the packet. look up the client,
get its shared secret, work on the packet.

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