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    SubjectRe: iptables and tcpdump
       From: Rusty Russell <>
    Date: Tue, 30 Oct 2001 15:28:12 +1100

    should the NAT layer be doing skb_unshare() before altering the packet?

    I think it should.

    Look, if you are messing with packets before they go back out, and
    tcpdump could have sniffed it on the way in, you can't change it's
    contents blindly.

    Franks a lot,
    David S. Miller
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