# turn on the kernel's notion of dynamic addressing
if [ -e /proc/sys/net/ipv4/ip_dynaddr ]; then
    if [ "$NOACT" != "yes" ]; then
        echo "1" > /proc/sys/net/ipv4/ip_dynaddr
    fi

    if [ "$SHOWRULES" = "yes" ]; then
        echo "echo \"1\" > /proc/sys/net/ipv4/ip_dynaddr"
    fi
fi