how to prevent ddosed

Source: World of network administrators Author: Li Yuewei Denial of Service (DoS) attacks are widely used by hackers. They exclusively occupy network resources and prevent other hosts from accessing them normally, resulting in downtime or network breakdown.DoS attacks include Smurf, SYN Flood, and Fraggle. In Smurf attacks, attackers use ICMP packets to block servers and other network resources; SYN Flood attacks use a large number of TCP semi-connect

Permissions +web service layer control).4. Access and execution control (WEB service layer + file system storage layer) After Trojan file is passed.5. MD5 fingerprint and backup of important configuration files, commands and WEB configuration files.6. Install anti-virus software ClamAV, etc., regularly monitor the Trojan horse.7. Configure the server firewall and Intrusion detection service.8. Monitoring server file changes, process changes, port changes, important security logs and timely alar

In order to prevent the server from being subjected to SSH brute force hack, will attempt ssh brute force hack this machine more than 10 times of IP to seal off, prohibit its landing this machine!#!/bin/bashCat/var/log/secure |awk '/failed/{print $ (NF-10)} ' | Sort |uniq-c| | awk ' {print $ ' = ' $ $; ' >/home/test.listFor i in ' cat/home/test.list 'DoIp= ' echo $i |awk-f "=" ' {print '} 'N= ' echo $i |awk-f "=" ' {print $} 'If [${n}-GT 10]; ThenA= '

people on the internet also said that the modification of /etc/resolvconf/resolv.conf.d/base this file is OK, I did not personally test, interested in the use of their own testing.Said so much, each version of the difference seems to be very troublesome, do not know the latest version or later version will not be changed, in fact, there is a more simple version-independent way to prevent the resolv.conf file is rewritten, that is method two.Method Tw

I use the SPRINGMVC framework for some time, but have been not clear when should be forwarded, when should be redirected. There may be too many things to forward so that you forget to redirect.When a user submits a POST request, refreshing the page causes the data to be submitted again, which is often said to repeat the submission. On-line access to the relevant information, found that the use of redirection can effectively prevent the duplication of

Com.apple.desktopservices dsdontwritenetworkstores True, and then log off and then log on or restart Mac OS X directly;There are multiple users on the machine, all users do so once, or the newly generated com.apple.desktopservices.plist files are copied to the ~/library/preferences directory of each user.Although this method can prevent Mac OS X from being generated again on the external device. Ds_store files, but the existing files can not be remov

Usually we open or manage various program items through the Start menu, but many times we don't want items from the Start menu to be arbitrarily altered, or the items in the Start menu are rearranged, which can also affect the operation. In fact, we can use Group Policy to enable the deletion of the "Start" menu of drag and drop and context menu, to see how the Win8 operating system to prevent settings. 1, the first need to return to the WIN8 system

The example of this paper is to analyze the way that PHP prevents form recurrence by recording IP. Share to everyone for your reference. The specific analysis is as follows: This principle is relatively simple is the first time the user submitted when we record the user's IP address, that way, if the user submits the form again within a fixed time, it prompts for a repeat submission, which is often used to support the application at the top, which is a very bad option to

Install the new radish home Ghost Win7 system users, will worry about the system stability, will occasionally come to a blue screen crash. Believe that more than new radish home Ghost Win7 system users will have this worry, all computer users will have this concern. Below, ink dye warm heart to explain to everybody how to do to prevent blue screen panic. To prevent the blue screen crash method: Fir

Computer blue screen is a common computer failure, because many people in our country is not a genuine windows7 operating system or driver, so many users of the computer will appear computer blue screen fault. Online also provides a number of solutions to solve the computer blue screen failure methods. So how do we take steps to prevent our computer from appearing on a blue screen? To prevent the end of the

1, click the combination key win+r, run the window to open, in the inside into the Gpedit.msc, and then click "OK" button, the Local Group Policy Editor Open, as shown: 2. After the local Group Policy Editor opens, locate the user Configuration, admin templates, Control Panel, and personalization options in the window and turn them on individually. Then, in the personalization settings on the left, select the "Prevent Change theme" Setting win

After installing some software, our computer will always have a little change, not on the desktop more than a few URLs icon, IE browser's default homepage was tampered with the Web site. The most exasperating is, in IE settings will be the default home page changed back, the next time to start Win7 and then changed back! If the IE default homepage is not returned, it must be the default home page entry in the WIN7 system registry has been tampered with. In order to

been its own.Harm of malicious reverse proxyWhat is the harm of Web site being a malicious reverse proxy? Here's a list: First of all, it will occupy the server resources, the website opening speed is affected. Second, others through the proxy misappropriation of your website data, for users and not so smart search engine, the equivalent of building a site that is exactly the same as you, then it is likely that your site will go into the search engine sandbox, or even down the righ

Prevent repeat online, statistics online number usually consists of three ways: 1. Records from the database 2. Use the ServletContext type of application 3. The first approach is simpler but creates a burden on the database. The second approach has not yet been implemented.:) This article implemented the practice of session, the basic idea is to establish a session log log name when normal landing, at this time to stimulate the listener. The code

In the use of computers, many small partners will find that each time a number of operations, 360 security guards always prevent hosts change. Like web developers often need to change the hosts configuration, but 360 often prevents changes, saying there is no permissions. What should I do with it? Here's a look. 360 security guards always prevent hosts from changing the solution.

We know that you can share files on a local area network to facilitate information and files, but if you don't want someone to pry into your computer's secrets. To prohibit the local area network user to access the computer , what should do? Here are a few ways you can prevent local area network users from accessing your computer : 　　1. Direct disconnect to prohibit access to the computer. Disconnect the caller. Click the Show Users button on the to

, Access destination IP port information, so every time ping, QQ, download, Web Access, there are on the router to establish a corresponding list of relationships. Now there are several network viruses, in a very short period of time, issued tens of thousands of consecutive requests for different IP links, so that the internal router to the PC to build more than a few NAT link. To prevent viruses from invading, these routers can also view the content

Now, many people are using IE browser, but, there are users to reflect, browsing the web site, the website will pop-up ads window, how to prevent these pop-up windows? When you use IE browser to browse the site, if the site has a pop-up window, it will automatically block and send a sound prompt. ie how to prevent pop-up windows 1. Temporarily allow pop-up windows If you need to see a blocked pop

Mydoom is the use of a worm to distribute the flood of proposed instructions. As these botnet businesses worldwide, Chile on the black market, attackers can use less than 100 dollars to buy botnets, and perhaps hire people for specific attacks at a cost of $5 per hour. DDoS attacks are difficult to explore because they often use normal connections and follow normal licensing communications. Results, this kind of invasion is very efficient, because the general situation in the policy service wi

　Office2016 How to set up a tutorial to prevent malware attack operations The latest news is that Microsoft has finally introduced an important security feature for Office 2016 that can be used to keep away from macro malware attacks. For years, the "macro virus" has been a mishap in the Office suite. Despite the convenience of macro operations, there are still a lot of attackers who look at it and believe that many people have seen "macros" in Word,