I have followed the instructions listed here (thread1598-1597009) but it still isn't blocking DNS traffic when I manually set a workstation behind the ASA5505 to 4.2.2.2.
Here is what I have in my access list and access-group:
ASA5505(config)# show run access-list
access-list outside_access_in extended permit icmp any any
access-list outside_access_in extended permit tcp any interface outside eq www
access-list outside_access_in extended permit tcp any interface outside eq https
access-list outside_access_in extended permit tcp any interface outside eq 3389
access-list outside_access_in extended permit tcp {iphere} 255.255.240.0 interface outside eq smtp
access-list {iphere}_splitTunnelAcl remark Local_LAN_Access
access-list {iphere}_splitTunnelAcl standard permit 172.25.10.0 255.255.255.0
access-list [iphere}_splitTunnelAcl remark Local_LAN_Access
access-list inside_nat0_outbound extended permit ip 172.25.10.0 255.255.255.0 192.168.15.0 255.255.255.224
access-list inside-out extended permit ip any any
access-list inside-out extended permit udp any host 208.67.222.222 eq domain
access-list inside-out extended permit udp any host 208.67.220.220 eq domain
access-list inside-out extended deny udp any any eq domain
ASA5505(config)#
ASA5505(config)#
ASA5505(config)# show run access-group
access-group outside_access_in in interface outside
access-group inside-out in interface inside
ASA5505(config)#
Any help would be appreciated!!