ACL: Does "permit IP" allow ICMP traffic like pings?

Discussion in 'Cisco' started by chartscharts, Jan 4, 2007.

  1. chartscharts

    chartscharts Guest

    I've found conflicting articles on the subject with some saying that if
    you "permit IP" it will allow ICMP through and others saying that you
    would also need a "permit ICMP"

    1. Does anyone know the definitive answer?
    2. Does anyone have a link to a cisco page that answers it?

    Thanks for your help!

    -chartscharts
     
    chartscharts, Jan 4, 2007
    #1
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  2. chartscharts

    John Agosta Guest

    ICMP is an IP protocol, so yes, permiting IP will also allow ICMP and
    anything else that sits on top of IP to pass.
     
    John Agosta, Jan 4, 2007
    #2
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  3. chartscharts

    Drx Guest

    on router yes but on pix ... I am not so sure
     
    Drx, Jan 5, 2007
    #3
  4. Yes, on the PIX as well, "permit ip" permits icmp along with all
    other ip protocols.
     
    Walter Roberson, Jan 5, 2007
    #4
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