ICMP type 3 Code 4

Discussion in 'LnS English Forum' started by jon_fl, Dec 12, 2004.

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  1. jon_fl

    jon_fl Registered Member

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    Should I allow ICMP: type 3 code 4? If so, outbound, inbound or both? Are there any security concerns? Thanks. :doubt:
     
    Last edited: Dec 12, 2004
  2. ArtLonger

    ArtLonger Registered Member

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    Dec 9, 2004
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    Inbound.

    ICMP Type 3 - Destination Unreachable Message

    IP Fields: Destination Address
    The source network and address from the original datagram's data.

    ICMP Fields: Type 3
    Code:
    0 = net unreachable;
    1 = host unreachable;
    2 = protocol unreachable;
    3 = port unreachable;
    4 = fragmentation needed and DF set;
    5 = source route failed.
     
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