{
    # Activate the chain and destroy the old.
    $OUT .=<<'EOF';
    /sbin/iptables --replace ForwardedTCP 1 \
        --jump $NEW_ForwardedTCP
    /sbin/iptables --flush $OLD_ForwardedTCP
    /sbin/iptables --delete-chain $OLD_ForwardedTCP
EOF
}
