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  1. #1
    Join Date
    Oct 2004
    Posts
    76

    Blocking ALL ICMP IN and OUT

    Is this a bad idea in general? I see its an option in CSF configuration and currently wondering your thoughts.
    Last edited by Twista; 10-17-2009 at 05:17 PM.
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  2. #2
    The ICMP protocol facilitates the use of important administrator utilities such as ping and traceroute, but it can also be manipulated by hackers to get a snapshot of your network

    So it's not at all a bad idea to block ICMP IN and OUT in the server.

  3. #3
    Join Date
    Jul 2009
    Posts
    240
    Quote Originally Posted by Alistair Smith View Post
    So it's not at all a bad idea to block ICMP IN and OUT in the server.
    i can also cause a lot of headaches when troubleshooting the network

    ICMP 0 and 8 are considered safe and shouldnt be blocked

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