Time-based ACLs

Config:

R1(config)# time-range bill-access-time
R1(config-time-range)# periodic weekdays 11:00 to 12:00
R1(config-time-range)# periodic weekdays 15:00 to 16:00
R1(config-time-range)# exit

R1(config)# access-list 107 permit ip 192.168.1.0 0.0.0.255 any time-range
bill-access-time

R1(config)# access-list 107 deny ip any any
R1(config)# interface fa 0/1
R1(config-if)# ip access-group 107 in
R1(config-if)# exit