File: chain.ferm

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ferm 2.7-2
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table filter {
    chain FOO {
        ACCEPT;
    }
    chain INPUT {
        # jump to previously declared chain
        proto tcp jump FOO;
        # jump to chain which is not yet declared
        proto udp jump BAR;
    }
    chain BAR {
        DROP;
    }

    chain (FORWARD OUTPUT) {
        LOG;
        @if @eq($CHAIN, FORWARD) ACCEPT;
        @if @eq($CHAIN, OUTPUT) DROP;
        @if @eq($CHAIN, INPUT) REJECT;
    }
}