how to set time for internet use

this will allow internet access for a particular time interval.

R4(config)#int f0/0

R4(config-if)#ip nat inside

R4(config-if)#int f0/1

R4(config-if)#ip nat outside

R4(config)#time-range testing

R4(config-time-range)#periodic daily  12:00 to 15:00

R4(config-time-range)#exit

R4(config)#access-list 110 permit ip any any time-range testing

R4(config)#access-list 110 deny ip  any any

R4(config)#ip nat pool test 179.100.0.2 179.100.0.2 netmask 255.255.255.252

R4(config)#ip nat inside source list 110 pool test overload