Router(config)# ip access-list dynamic d-list1 http src any dest any
Router(config)# ip access-list dynamic d-list1 dns src any dest any
Router(config)# ip access-list pop3 permit tcp src any dest any dport eq 110
Router(config)# ip access-list dynamic d-list1 access pop3
Router(config)# ip access-list all-block deny ip src any dest any
Router(config)# ip ufs-cache enable

Router(config)# interface FastEthernet0/0.0
Router(config-FastEthernet0/0.0)# ip filter d-list1 1 out
Router(config-FastEthernet0/0.0)# ip filter all-block 1 in

これでいいよ