Cisco SB-101. Bad DNS query from [address]

Dec 29 23:51:59.957: %DNSSERVER-3-BADQUERY: Bad DNS query from 151.217.31.218
Dec 29 17:51:59.957: Length=29
Dec 29 17:51:59.957: 0x81B94DE8 47 45 54 20 2F 20 48 54 54 50 2F 31 2E 31 0D 0A
Dec 29 17:51:59.957: 0x81B94E08 48 6F 73 74 3A 20 77 77 77 0D 0A 0D 0A
Dec 30 18:28:46.459: %DNSSERVER-3-BADQUERY: Bad DNS query from 31.22.7.61
Dec 30 12:28:46.459: Length=29
Dec 30 12:28:46.459: 0x81B965E8 47 45 54 20 2F 20 48 54 54 50 2F 31 2E 31 0D 0A
Dec 30 12:28:46.463: 0x81B96608 48 6F 73 74 3A 20 77 77 77 0D 0A 0D 0A

~$ nslookup google.com
;; connection timed out; no servers could be reached

~$ nslookup google.com
Server: 127.0.0.1
Address: 127.0.0.1#53

Non-authoritative answer:
Name: google.com
Address: 173.194.32.136
Name: google.com
Address: 173.194.32.137
Name: google.com
Address: 173.194.32.142
Name: google.com
Address: 173.194.32.128
Name: google.com
Address: 173.194.32.129
Name: google.com
Address: 173.194.32.130
Name: google.com
Address: 173.194.32.131
Name: google.com
Address: 173.194.32.132
Name: google.com
Address: 173.194.32.133
Name: google.com
Address: 173.194.32.134
Name: google.com
Address: 173.194.32.135

cisco#sh run
Building configuration...

Current configuration : 2862 bytes
!
! Last configuration change at 18:50:21 Almaty Thu Jan 2 2014 by *******
! NVRAM config last updated at 21:56:23 Almaty Mon Dec 30 2013 by *******
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec localtime
service password-encryption
!
hostname cisco
!
boot-start-marker
boot-end-marker
!
no logging console
no logging monitor
!
no aaa new-model
clock timezone Almaty 6
no ip dhcp use vrf connected
no ip dhcp conflict logging
ip dhcp excluded-address 192.168.1.1
ip dhcp excluded-address 192.168.1.1 192.168.1.5
!
ip dhcp pool LAN
import all
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 192.168.1.1
!
!
ip cef
ip domain name ********
ip host asus 192.168.1.5
ip host dlink 192.168.1.2
ip host tplink 192.168.1.3
ip name-server 91.185.6.10
ip name-server 91.185.2.10
ip ddns update method dyndns
HTTP
add http://**************@members.dyndns.org/nic/update?system=dyndns&hostname=<h>&myip=< a>
interval maximum 1 0 0 0
!
login on-failure log
!
!
username ******* privilege 15 secret 5 $1$L5U2$xFuyIYP0r5yYptBoweZ7J/
!
!
ip ssh authentication-retries 2
ip ssh version 2
!
!
buffers big permanent 150
buffers big initial 150
!
!
interface Ethernet0
description === LAN ===
ip address 192.168.1.1 255.255.255.0
ip nat inside
no cdp enable
!
interface Ethernet1
description === ISP ===
no ip address
duplex auto
pppoe enable group global
pppoe-client dial-pool-number 1
no keepalive
no cdp enable
!
interface Dialer0
description === PPPoE ===
ip ddns update hostname *******.dyndns.org
ip ddns update dyndns
ip address negotiated
ip mtu 1492
ip nat outside
encapsulation ppp
dialer pool 1
dialer idle-timeout 0
dialer persistent
dialer-group 1
no cdp enable
ppp authentication pap callin
ppp pap sent-username ******** password 7 045908081B294E545B49554E
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 Dialer0
no ip http server
ip http access-class 23
ip http authentication local
no ip http secure-server
!
ip dns server
ip nat inside source list 1 interface Dialer0 overload
ip nat inside source static tcp 192.168.1.2 80 interface Dialer0 1001
ip nat inside source static tcp 192.168.1.3 80 interface Dialer0 1000
ip nat inside source static tcp 192.168.1.5 6881 interface Dialer0 6881
ip nat inside source static tcp 192.168.1.4 6882 interface Dialer0 6882
ip nat inside source static tcp 192.168.1.5 3389 interface Dialer0 3389
!
access-list 1 permit 192.168.1.0 0.0.0.255
dialer-list 1 protocol ip permit
no cdp run
!
control-plane
!
!
line con 0
login local
no modem enable
line aux 0
line vty 0 4
access-class 23 in
exec-timeout 2 0
privilege level 15
logging synchronous
login local
transport input ssh
transport output all
!
scheduler max-task-time 5000
sntp server 194.33.191.69
sntp source-interface Dialer0
end