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Hi, I am wondering if iptables can filter TCP traffic that's inside a GRE tunnel. Does iptables look for protocol field of the innermost IP or the outermost IP? Thanks....
  1. 06-11-2009 #1
    echo_2008
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    iptables filtering GRE traffic



    Hi,

    I am wondering if iptables can filter TCP traffic that's inside a GRE tunnel. Does iptables look for protocol field of the innermost IP or the outermost IP?

    Thanks.
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  2. 06-29-2009 #2
    vickey_20
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    What is a GRE tunnel??
    heres a good iptables tutorial
    Iptables Tutorial 1.2.2
    Only if I could understand the man pages
    Registered Linux user #492640
    OS: RHEL4,5 ,RH 9,Ubuntu
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