We're Sorry, Full Content Access is for Members Only...

If you like to keep on reading, Become a Member Now! Here is why:

  • Learn any CCNA, CCNP and CCIE R&S Topic. Explained As Simple As Possible.
  • Try for Just $1. The Best Dollar You've Ever Spent on Your Cisco Career!
  • Full Access to our 651 Lessons. More Lessons Added Every Week!
  • Content created by Rene Molenaar (CCIE #41726)

451 Sign Ups in the last 30 days

100% Satisfaction Guaranteed!
You may cancel your monthly membership at any time.
No Questions Asked!

Tags: ,

Forum Replies

  1. Hi Ruby,

    The time based access-list is basically the “poor man’s” solution to block access on routers. You can use access-lists only to filter on L3/L4 information (IP addresses, protocols and port numbers) so you can’t filter based on hostnames.

    One way to get around this is to block all prefixes that belong to a certain AS. For example, facebook uses AS 32934. We can find their prefixes with whois:

    $ whois -h whois.radb.net -- '-i origin AS32934' | grep 'route:'
    route: 66.
    ... Continue reading in our forum

  2. Dear Rene,

    Thanks for your article…

    What will be the command periodic if we want to block traffic from Sunday to Thrusday ?


  3. Hi Rene,
    In our client network,
    The Cisco Layer 2 Switch 2960G port 15 which is connected to the L2VPN MPLS-TP network and each month or time not remembering , the port is getting down and they are changing the port to other 16 Which was also configured for the same service. Once contractor was done this but client want to know if there is any time based port security is enable or no, Kindly share your advise.

4 more replies! Ask a question or join the discussion by visiting our Community Forum