Assigning DNS addresses from Radius on LNS

Hi we have a router which acts as an LNS and authenticates LT2P sessions via radius assigning each to a tunnel interface and giving it an IP address, we would also like to assign DNS settings via radius, we are using steel belted radius which is capable of doing this but we can't seem to get it to work.
What I believe are relevant sections of the config are below;
Any help greatly appreciated.
Thanks
Matt
version 12.2
aaa new-model
aaa authentication login default line
aaa authentication ppp default group radius
aaa authorization network default group radius
aaa session-id common
ip name-server 4.2.2.2
vpdn enable
vpdn-group conn
accept-dialin
protocol l2tp
virtual-template 1
terminate-from hostname G20
local name wllns
l2tp tunnel password 7 050703062F4D4A064B
vpdn-group test_G30
accept-dialin
protocol l2tp
virtual-template 1
terminate-from hostname G30
local name wllns
l2tp tunnel password 7 06115E3349420C0A161B420C5D076724762121302E120912
vpdn-group test_G40
accept-dialin
protocol l2tp
virtual-template 1
terminate-from hostname G10
local name wllns
l2tp tunnel password 7 131246000E0001393828783464215E08440A135355595D50
interface Virtual-Template1
ip unnumbered FastEthernet0/0
no ip route-cache
peer default ip address pool mypool
ppp authentication chap
ip local pool mypool 172.20.0.1 172.20.30.254
radius-server host 172.21.0.252 auth-port 1645 acct-port 1646
radius-server key test
radius-server authorization permit missing Service-Type
call rsvp-sync
end

Hi Matt,
Use the following Cisco AVP in Radreply.
Cisco-AVPair+=ip:dns-servers=x.x.x.x
HTH
Hitesh Vinzoda
Please rate useful posts.

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Hi,
I'm trying to assign different ip addresses to each vpn client depending the group the belong to. To do so, I create three different pools locally to the router and configure the radius server to send the Cisco-AVPair=”ip:addr-pool=poolname” attribute. The radius server is sending this attribute correctly but the router isn't using it. If I try with the Framed-IP-Address it works fine, but not for the pool.
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testuser Auth-Type := Local, User-Password == "testpass"
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Framed-Protocol = PPP,
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Without enabling authorization, testuser connects succesfully, but after I enable authorization to instruct the router to accept pool configuration, it automatically authenticate using the isakmp Users user, without asking for the real vpn testuser client and the connection fails.
Is authorization essential? Using authentication I can assign ip addresses from Radius.
I also used the Framed-IP-Pool value without success.
What I'm missing?
Thanks in advance.

Hi Jatin,
Thanks for your quick reply. Here is the new configuration and the debugs. I'm using IOS c890-universalk9-mz.152-1.T.bin and Cisco VPN client 5.0.07.0290 version.
IOS Configuration with authorization and accounting enabled:
aaa new-model
aaa authentication login RemoteUsers group radius
aaa authorization network UsersGroup group radius
aaa accounting network default
aaa session-id common
IOS Debugs:
Jun 4 21:20:46.133: AAA/BIND(00000010): Bind i/f
Jun 4 21:20:46.149: AAA/AUTHOR (0x10): Pick method list 'UsersGroup'
Jun 4 21:20:46.153: RADIUS/ENCODE(00000010):Orig. component type = VPN IPSEC
Jun 4 21:20:46.153: RADIUS: AAA Unsupported Attr: interface         [222] 11
Jun 4 21:20:46.153: RADIUS:   31 30 2E 31 34 2E 31 34 2E         [ 10.14.14.]
Jun 4 21:20:46.153: RADIUS(00000010): Config NAS IP: 0.0.0.0
Jun 4 21:20:46.153: RADIUS(00000010): Config NAS IPv6: ::
Jun 4 21:20:46.153: RADIUS/ENCODE(00000010): acct_session_id: 6
Jun 4 21:20:46.153: RADIUS(00000010): sending
Jun 4 21:20:46.153: RADIUS/ENCODE: Best Local IP-Address 10.14.14.30 for Radius-Server 10.14.14.17
Jun 4 21:20:46.153: RADIUS(00000010): Send Access-Request to 10.14.14.17:1812 id 1645/4, len 98
Jun 4 21:20:46.153: RADIUS: authenticator 01 A1 34 BE 06 3D C2 C5 - 4F EE 98 D7 47 4D BF AB
Jun 4 21:20:46.153: RADIUS: User-Name           [1]   10 "Users"
Jun 4 21:20:46.153: RADIUS: User-Password       [2]   18 *
Jun 4 21:20:46.153: RADIUS: Calling-Station-Id [31] 13 "10.14.14.17"
Jun 4 21:20:46.153: RADIUS: NAS-Port-Type       [61] 6   Virtual                   [5]
Jun 4 21:20:46.153: RADIUS: NAS-Port            [5]   6   0
ruc#
Jun 4 21:20:46.153: RADIUS: NAS-Port-Id         [87] 13 "10.14.14.30"
Jun 4 21:20:46.153: RADIUS: Service-Type        [6]   6   Outbound                  [5]
Jun 4 21:20:46.153: RADIUS: NAS-IP-Address      [4]   6   10.14.14.30
Jun 4 21:20:46.153: RADIUS(00000010): Sending a IPv4 Radius Packet
Jun 4 21:20:46.153: RADIUS(00000010): Started 5 sec timeout
ruc#
Jun 4 21:20:48.205: RADIUS: Received from id 1645/4 10.14.14.17:1812, Access-Reject, len 20
Jun 4 21:20:48.205: RADIUS: authenticator 2A B6 91 42 DF 70 2B 89 - AF D5 59 82 31 3B EA 53
Jun 4 21:20:48.205: RADIUS(00000010): Received from id 1645/4
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FreeRadius debug:
Ready to process requests.
rad_recv: Access-Request packet from host 10.14.14.30:1645, id=4, length=98
        User-Name = "Users"
        User-Password = "cisco" <--Where does this password comes from?!
        Calling-Station-Id = "10.14.14.17"
        NAS-Port-Type = Virtual
        NAS-Port = 0
        NAS-Port-Id = "10.14.14.30"
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Processing the authorize section of radiusd.conf
modcall: entering group authorize for request 0
modcall[authorize]: module "preprocess" returns ok for request 0
radius_xlat: '../var/log/radius/radacct/10.14.14.30/auth-detail-20130604.log'
rlm_detail: ../var/log/radius/radacct/%{Client-IP-Address}/auth-detail-%Y%m%d.lo
g expands to ../var/log/radius/radacct/10.14.14.30/auth-detail-20130604.log
modcall[authorize]: module "auth_log" returns ok for request 0
modcall[authorize]: module "chap" returns noop for request 0
modcall[authorize]: module "mschap" returns noop for request 0
    rlm_realm: No '@' in User-Name = "Users", looking up realm NULL
    rlm_realm: No such realm "NULL"
modcall[authorize]: module "suffix" returns noop for request 0
rlm_eap: No EAP-Message, not doing EAP
modcall[authorize]: module "eap" returns noop for request 0
    users: Matched entry DEFAULT at line 188
modcall[authorize]: module "files" returns ok for request 0
rlm_pap: WARNING! No "known good" password found for the user. Authentication m
ay fail because of this.
modcall[authorize]: module "pap" returns noop for request 0
modcall: leaving group authorize (returns ok) for request 0
rad_check_password: Found Auth-Type System
auth: type "System"
ERROR: Unknown value specified for Auth-Type. Cannot perform requested action
auth: Failed to validate the user.
Login incorrect: [Users/cisco] (from client vpnServer port 0 cli 10.14.14.17)
Delaying request 0 for 1 seconds
Finished request 0
Going to the next request
--- Walking the entire request list ---
Waking up in 1 seconds...
--- Walking the entire request list ---
Waking up in 1 seconds...
--- Walking the entire request list ---
Sending Access-Reject of id 4 to 10.14.14.30 port 1645
Waking up in 4 seconds...
--- Walking the entire request list ---
Cleaning up request 0 ID 4 with timestamp 51ae5a41
Nothing to do. Sleeping until we see a request.
Any idea Jatin?

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Hello:
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Thank you for the suggestion. I added debug radius and this is what was returned. instead of the user getting the IP y.y.y.20 the next available IP in the DHCP local pool y.y.y.13 is assigned to the user instead.
Any other suggestions now that you are looking at ths output?
Tor1-LNS1#test aaa group radius [email protected] password2 new-code
User successfully authenticated
Sep 3 01:57:59.682: AAA/AUTHEN/LOGIN (00000000): Pick method list 'default'
Sep 3 01:57:59.682: RADIUS/ENCODE(00000000):Orig. component type = INVALID
Sep 3 01:57:59.682: RADIUS/ENCODE(00000000): dropping service type, "radius-server attribute 6 on-for-login-auth" is off
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Sep 3 01:57:59.682: RADIUS: User-Name           [1]   21 "[email protected]"
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Tor1-LNS1#Framed                    [2]
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We need to authenticate before assign IP address

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Lora

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