How To Crack CCNA Exam: Time Based Access List

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Thursday, 13 October 2011

Time Based Access List

Time Based Access List: It is similar like Extended Access List but it allows the access control based on time. A time range is defined in terms of weeks and

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days. It is identified by name and then it is referenced by a function. Lets understand one example.

1) I am defining name of the time-range

R(config)# time-range raviworkingday

2) Days and Time can be defined as below

R(config-time-range)# periodic Monday Tuesday Wednesday Thursday Friday 9:00 to 16:00

3) Now creating Extended Access List to allow telnet Including time range

R(config)#access-list 150 permit tcp 192.168.1.0 0.0.0.255 10.1.1.0 0.0.0.255 eq telnet time-range raviworkingday

4) Applying inbound Access List on interface fa0/1

R(config)#int fa0/1

R(config-if)#ip address 192.168.1.1 255.255.255.0

R(config-if)#ip access-group 150 in

In this example telnet from 192.168.1.0 network to 10.1.1.0 network is permitted on working days during business hours.