how to prevent from the packages of ping?

Discussion in 'LnS English Forum' started by awisc, Jun 7, 2007.

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  1. awisc

    awisc Registered Member

    Joined:
    May 29, 2007
    Posts:
    10
    i have set the rule of ping(ICMP) to prevent anyothers from pinging my computer.
    but i found that this rule is fail.they still can ping me .
    how to set the internet filtering rules?
     
  2. Climenole

    Climenole Look 'n' Stop Expert

    Joined:
    Jun 3, 2005
    Posts:
    1,640
    Hi awisc :)

    There is no rule to prevent other computer to ping yours...
    You have no control on their computers, right?

    The only needed rules for ICMP on Internet are:

    a rule to allow your PC to ping:
    ICMP type 8 code 0 : echo request
    outgoing only

    a rule to received the answer of the previous "ping"
    ICMP type 0 code 0 : echo reply
    incoming only

    a rule for the "timeout" used by trace route
    ICMP type 11 code 0: time to live expired
    incoming only

    all the other ICMP type/code must be blocked in and out.

    The other PCs may "ping" your PC a million time, the pings are blocked with no answer from you...

    This keep your PC "stealth" at the level of the ICMP.

    :)
     
  3. Frederic

    Frederic LnS Developer

    Joined:
    Jan 9, 2003
    Posts:
    4,354
    Location:
    France
    Maybe you have a router, and your router is answering pings directly without having the PC (and Look 'n' Stop) involved at all.

    Frederic
     
  4. awisc

    awisc Registered Member

    Joined:
    May 29, 2007
    Posts:
    10
    thanks to Climenole and Frederic.
     
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