Time-based ACLs were alien in Cisco IOS Software Release 12.0.1.T.
While agnate to continued ACLs in function, they acquiesce for
admission ascendancy based on time. A time ambit is created that
defines specific times of the day and anniversary in adjustment to
apparatus time-based ACLs. The time ambit is articular by a name and
again referenced by a function. Therefore, the time restrictions are
imposed on the action itself. The time ambit relies on the router
arrangement clock. The router alarm can be used, but the affection
works best with Arrangement Time Protocol (NTP) synchronization.
These are time-based ACL commands.
!--- Defines a called time range.
!--- Defines the alternate times.
alternate days-of-the-week hh:mm to [days-of-the-week] hh:mm
!--- Or, defines the complete times.
complete [start time date] [end time date]
!--- The time ambit acclimated in the absolute ACL.
ip access-list name|number time-rangename_of_time-range
In this example, a Telnet affiliation is
acceptable from the central to alfresco arrangement on Monday,
Wednesday, and Friday during business hours:
ip abode 10.1.1.1 255.255.255.0
ip access-group 101 in
access-list 101 admittance tcp 10.1.1.0 0.0.0.255 172.16.1.0 0.0.0.255
eq telnet time-range EVERYOTHERDAY
alternate Monday Wednesday Friday 8:00 to 17:00