How to attack the mining platform
mining chip has gone from CPU mining to GPU mining to FPGA mining, and now it has entered the era of ASIC mining. However, the way of mining has also experienced from one or two mining machines to small mining machine workshops, and now it has entered the era of large-scale mining
(1) mining mode: from one miner to large-scale mine
if you start to try mining, you need to prepare a miner, a computer with internet connection, an AUC, a raspberry pie, power supply and various connecting cables. The connection order of various devices is network cable - & gt; Raspberry pie - & gt; Microusb cable - & gt; AUC-> 4Pin cable - & gt; Mining machine and power supply
a new customer recently consulted with sine security company, saying that his server often fails to open the website of the card, and the remote connection to the server is extremely slow. Sometimes the Ping value reaches 300-500, and he often switches. After listening to the customer's words,
will generally judge that he has been attacked by CC + DDoS mixed traffic, It's strange to say that there is no traffic attack on the computer room. It's not a traffic attack, but it also causes the server card and website to fail to open. What kind of attack is this? In order to solve the problem of
client server card, we immediately arranged a security engineer to carry out security detection and deployment on his Linux server
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Mining Trojan horse is also designed. If the mining process is forced to stop by customers, it will automatically start to continue mining to achieve uninterrupted mining.
careful inspection shows that it is through setting the hourly task plan, remotely downloading shell mining Trojan horse, and then executing, Check whether the current process exists or not. If not, start the Trojan horse to mine
a detailed security inspection was carried out on the client's Linux server. It was found that fortunately, there was no encrypted server data, and the worm was infected with the disease through the security detection and analysis of our security engineers, we found that the server uses Apache Tomcat environment, the open architecture of the platform is JSP + Oracle database, and Apache Tomcat uses the version of 2016, which leads to the serious remote command execution vulnerability of Apache, Through this vulnerability, the intruder can directly invade the server and get the administrator permission of the server,
virus. If the data was encrypted, the loss would be great. The client was a platform, and the client's data was very important. After finding out the mining Trojan horse,
do customers need to know how the server is attacked? Was the Trojan horse uploaded? It can prevent the attack
in the later stage
sine security engineer immediately repairs the Apache vulnerability and clears the Trojan horse. So far, the problem has been solved, the client server
runs stably, and the network station opens normally
dig out in one day
5gtc = 30RMB
20 day income is 300
(pay attention to two numbers + double income in 20 days at the same time) invest 600 mining tools,
dig out in one day 10gtc = 60RMB
20 day income is 600 investment 900 mining tools,
dig out in one day 15gtc = 90rmb
20 day income is 900
as one of the world's leading scholars in hedge fund research, Professor Liang Bing of the school of advanced finance of Shanghai Jiaotong University told Hexun that according to a survey concted by a Chicago hedge fund research institution, there are more than 9800 hedge funds in the world, with $2.25 trillion under management by the end of last year. The instry distribution is asymmetric. Funds with more than US $5 billion account for only 5% of the total, but account for about 70% of the market assets
the launch of stock index futures is known as the first year of Chinese hedge funds, but it is still a baby compared with overseas mature markets. Among them, the lack of breadth and depth of China's financial market has become a major challenge for the development of hedge funds in China. At present, only stock index futures have been officially launched for financial derivatives, and treasury bond futures have just been approved by China Securities Regulatory Commission recently, but they have not yet been officially launched. Liang Bing said that the main investment targets of foreign hedge funds are unlimited, including global stock markets, sovereign bonds, corporate bonds and other bonds, as well as various financial derivatives and structured procts
in addition to the limitation of investment targets and hedging instruments, there is also a gap between the sources of funds. Yan Hong, a professor at the Senior School of finance of Shanghai Jiaotong University, said that in addition to the high net worth group, most of the overseas hedge funds come from institutional investors, such as insurance (reassurance) funds, University foundations, pension funds, etc. in China, these institutional investors need to approve the docking of hedge funds, such as the raising, access, and management of hedge funds Regulation requires relevant laws and regulations, and investors are not mature in the idea that hedge funds can hedge risks and obtain stable returns
in addition, many domestic futures private placements mainly focus on the speculative trading of commodity futures and financial futures to gain the spread income. Even if they also participate in the stock index futures market, they can not be called hedge funds in a strict sense because they are not regarded as hedging price risk tools but as speculative targets. Liang Bing pointed out: "studies have shown that the main purpose of foreign hedge funds using derivatives is hedging and risk aversion. Few of them only trade derivatives to obtain speculative profits, and more of them use derivatives as a risk management tool, which is different from the domestic derivatives market which mainly focuses on speculation."
in recent years, the domestic quantitative investment transaction is very popular and highly respected, and some companies even regard it as a God in the publicity. However, Liang Bing believes that although quantification can be regarded as a strategy, it is also a tool“ At present, the main strategies of overseas hedge funds are long short, global macro, relative value arbitrage and event driven. Successful trading requires the organic combination of art and science. Years of accumulated experience is a subjective art, and quantification is a scientific means. Quantification alone is not enough. "< In fact, there are few real hedge funds in China Yan Hong said that many successful overseas hedge fund managers used to be traders in the self operation Department of securities companies, public offering fund managers and CTA (commodity futures investment consultant) managers. The talent reserves of securities companies and funds have advantages over the futures instry, but the futures instry has more experience in derivatives, and Futures private placement or futures companies are likely to develop into "small and beautiful" CTAs rather than hedge funds< However, in the early stage of development, the charm of hedge funds can not be underestimated. According to Hexun, Chen Dongsheng, former general manager of CAITONG fund, is setting up Tong'an Investment Management Co., Ltd. From the top management of fund companies to venture abroad, Chen Dongsheng is very optimistic about the future prospects of China's hedge funds and is committed to building a hedge fund platform. In fact, a number of senior people in the futures circle have left their posts and started to lay out the hedge fund instry in China.