[EXTERNAL] RE: Freeradius DHCP

Winfield, Alister Alister.Winfield at sky.uk
Mon Aug 12 08:42:33 CEST 2019


As with most AAA questions the answer is look to the session management device (BRAS, wifi controller etc etc). What is common is for the DHCP interop to actually create a RADIUS request to setup the sessions QoS etc and thus it's here you get to refuse to connect a device. That ASR 1000 certainly should do something like this. If you refuse the DHCP shouldn't happen anyway which is the best you can do really.

A.


´╗┐On 12/08/2019, 02:24, "Freeradius-Users on behalf of Maile Halatuituia" <freeradius-users-bounces+alister.winfield=sky.uk at lists.freeradius.org on behalf of maile.halatuituia at tcc.to> wrote:

    Hi Alan
    Sorry I should have read more before I send the question.

    Actually I was referring to the PPPoE like Authentication and you have confirmed DHCP does not do the same.

    Any idea how I would achieve at least similar to PPPoE. I mean is it possible to authenticate DHCP clients before assigning the Address. I mean similar to what PPP does with Freeradius on PPPoE.


    -----Original Message-----
    From: Freeradius-Users <freeradius-users-bounces+maile.halatuituia=tcc.to at lists.freeradius.org> On Behalf Of Alan DeKok
    Sent: Monday, 12 August 2019 1:34 PM
    To: FreeRadius users mailing list <freeradius-users at lists.freeradius.org>
    Subject: Re: Freeradius DHCP

    On Aug 11, 2019, at 4:34 PM, Maile Halatuituia <maile.halatuituia at tcc.to> wrote:
    > I am wondering if someone could provide links or detail for setting up Freeradius to do Authentication dor DHCP user.

      Do you mean MAC address authentication?

      The DHCPO protocol doesn't do authentication.

    >
    > My scenario is like this.
    >
    >
    > BRAS DHCP Server (Cisco ASR 1000) ---------- L2 Networks -------------- DHCP Relay Agent (Residential Gateway Router) ----------- WIFI or LAN Clients.
    >
    >            |
    >
    >            |
    >
    >   Freeradius Server

      Does the BRAS send RADIUS packets to the RADIUS server?

    >
    > With the Basic Setup i already have this Radius Packet sent from my BRAS to my Freeradius Server below
    >
    >        Acct-Session-Id = "00000014"
    >        Framed-IP-Address = x.x.x.x

      That's an accounting packet.  That isn't authentication.

      Alan DeKok.


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