Cisco ASA 5510: Blocking access by domain name

Was requested to block domains to a certain group of users. This is the code I use on my Cisco 5510 IOS 7.2(2)  to block facebook.com

! define the domains that you want to block

regex domain1 "\.facebook\.com"
regex domain2 "facebook\.com"


! identify the users' IP addresses. ie, the users you want to block
! if you want to block all, replace 'host 192.168.0.x' with 'any'

access-list inside_mpc extended permit tcp host 192.168.0.100 any eq www 
access-list inside_mpc extended permit tcp host 192.168.0.101 any eq www 


  
class-map type regex match-any DomainBlockList
 match regex domain1
 match regex domain2

class-map type inspect http match-all BlockDomainsClass
 match request header host regex class DomainBlockList
class-map inspection_default
 match default-inspection-traffic
class-map httptraffic
 match access-list inside_mpc

policy-map type inspect http http_inspection_policy
 parameters
  protocol-violation action drop-connection
  match request method connect
  drop-connection log
 class BlockDomainsClass
 reset log

policy-map inside-policy
class httptraffic
inspect http http_inspection_policy

service-policy inside-policy interface inside