اشکال در DNS

سلام
من یک روتر 2800 دارم که یک ماژول AM-8 (انالوگ مودم 8 پورت) روی اون نصب کردم کانفیگ هم شده یوزر ها هم میتونن کانکت بشن. ولی به یوزر ها آدرس DNS رو نمیده و یوزر ها فقط با IP میتونن کار کنن. لطفا راهنمایی کنید.
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version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname RTR
!
boot-start-marker
boot-end-marker
!
logging buffered 51200 warnings
enable secret 5 $1$a0hf$.HycNiTKzDNLL2YH7Gape0
!
aaa new-model
!
!
aaa authentication login no-tac line
aaa authentication ppp default if-needed group radius
aaa authorization network default group radius
aaa accounting nested
aaa accounting update newinfo
aaa accounting exec default start-stop group radius
aaa accounting network default start-stop group radius
!
aaa session-id common
!
resource policy
!
clock timezone PCTime 3 30
ip subnet-zero
!
!
ip cef
!
!
ip domain lookup source-interface FastEthernet0/0.1
ip domain name nosazi.com
ip name-server 192.168.1.8
no vlan accounting
async-bootp dns-server 192.168.1.8
!
username admin privilege 15 secret 5 $1$AFzG$G3uNCZgMdi8xsNgfupiQ//
username remas password 7 095E4B041816
!
!
!
interface Loopback0
no ip address
!
interface FastEthernet0/0
description Link_hafez_TRUNK
no ip address
duplex full
speed auto
no mop enabled
!
interface FastEthernet0/0.1
encapsulation dot1Q 1 native
ip address 192.168.1.110 255.255.255.0
ip nat inside
no snmp trap link-status
!
interface FastEthernet0/0.2
encapsulation dot1Q 2
ip address 192.168.4.10 255.255.255.0
ip nat inside
no snmp trap link-status
!
interface FastEthernet0/0.3
encapsulation dot1Q 3
ip address 192.168.6.10 255.255.255.0
ip nat inside
no snmp trap link-status
!
interface FastEthernet0/1
ip address 10.64.130.82 255.255.255.0
ip nat outside
duplex auto
speed auto
!
interface Group-Async0
ip unnumbered Loopback0
ip nat inside
encapsulation ppp
dialer in-band
dialer idle-timeout 600
dialer-group 1
async mode interactive
peer default ip address pool dialin
ppp authentication pap chap
group-range 1/0 1/7
!
router rip
version 2
network 192.168.1.0
network 192.168.4.0
network 192.168.6.0
network 192.168.10.0
!
ip local pool dialin 192.168.10.1 192.168.10.10
ip classless
ip route 0.0.0.0 0.0.0.0 FastEthernet0/1
!
ip http server
ip http access-class 23
ip http authentication local
ip http timeout-policy idle 60 life 86400 requests 10000
ip nat inside source list 1 interface FastEthernet0/1 overload
!
access-list 1 remark SDM_ACL Category=2
access-list 1 permit 192.168.1.0 0.0.0.255
access-list 1 permit 192.168.4.0 0.0.0.255
access-list 1 permit 192.168.6.0 0.0.0.255
access-list 1 remark Permit M15 to use nat
access-list 1 permit 192.168.2.0 0.0.0.255
access-list 1 remark permit sw to use nat
access-list 1 permit 192.168.3.0 0.0.0.255
dialer-list 1 protocol ip permit
radius-server host 192.168.1.2 auth-port 1645 acct-port 1646 timeout 30 key 7 110716161608020F0D39282B
!
control-plane
!
!
line con 0
line aux 0
line 1/0 1/7
modem InOut
transport input all
autoselect ppp
flowcontrol hardware
line vty 0 4
access-class 23 in
privilege level 15
transport input telnet
!
scheduler allocate 20000 1000
!
end
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