My workstation is under Linux. I have an Active Directory domain controller + Radius server on Windows 2008. I can verify user account 'radius-01' using 'radtest' tool:

    $ radtest -t pap radius-01 password123 195.234.133.32 1812 password123
    Sending Access-Request of id 98 to 195.234.73.2 port 1812
            User-Name = "radius-01"
            User-Password = "password123"
            NAS-IP-Address = 127.0.1.1
            NAS-Port = 1812
    rad_recv: Access-Accept packet from host 195.234.133.32 port 1812, id=98, length=84
            Framed-MTU = 1344
            Framed-Protocol = PPP
            Service-Type = Framed-User
            Class = 0x537004f00000013700010200ac1c0...

I have joined my Linux PC to Active Directory domain ARB-HRK using Samba:

    [root@shev-arb]# net ads testjoin
    Join is OK

I can dump machine password:

    [root@shev-arb]# tdbdump /var/lib/samba/private/secrets.tdb
    {
    key(34) = "SECRETS/MACHINE_PASSWORD/ARB-HRK"
    data(15) = "yGgXJsquRnpT0g\00"
    }

How can i authenticate my machine account on Radius server?

Do anybody know any tools for this, like:

    radtest   shev-arb$ yGgXJsquRnpT0g 195.234.133.32 1812 password123

(this command fails)