how to avoid ddos attack

We will encounter DDoS attacks when we operate on the service device. So know the principle of DDoS attack is very important, then we need to know not only the concept of DDoS attack principle, but more importantly to know the back of the

What is DDoS? DDoS attacks are a test proposed by an attacker to deplete resources available to the network, the application or the service, so that real users cannot access those resources. It is an attack by a group of malicious software-infected computers or voluntary client computers that attempt to deplete the resources of a particular network, web site, or

Then, how can we determine whether the website is under DDOS attacks? In summary, when the website is under DDOS attacks, the following symptoms may occur: If the website server has all of the following symptoms, the website is basically determined to be under DDOS attacks. 1. The normal services provided by the website become abnormal. This symptom is: The Webpa

server or the ntpdate request of the end user, ABC is the ntp server. For more information, see. Ntp server Association (Association Modes) Reference: http://doc.ntp.org/4.2.2/assoc.html0x01 FAQ1. what is the impact of NTP Reply Flood Attack (NTP reflected DDos Attack? Does it only affect the ntp server or the ntp client? Whether it is the ntp server or the ntp

Attack | difference For readers: DDoS researcher, major webmaster, network administratorPre-Knowledge: ASP Basic reading abilityMany friends know the barrel theory, the maximum capacity of a bucket of water is not determined by its highest place, but by its lowest place, the server is the same, the security of the server is determined by its weakest point, and the most vulnerable places are more dangerous t

PHP implements malicious DDoS attacks to avoid bandwidth-consuming methods, malicious DDoS DDoS attacks implemented using PHP code can cause bandwidth to be consumed and become card B. The approach is: Modify the php.ini file 1) "Disable_functions" changed to Gzinflate, the default is to vent2) "Allow_url_fopen"

In the article prolexic released the first quarter of 2014 Global DDoS attack report published by quickshield, we learned that the attack traffic initiated by the "Reflection amplification" technology increased by 39% compared with the previous quarter, at the same time, attackers are constantly exploring other basic Internet services to launch

Counterfeit Google crawlers have become the third-largest DDoS attack tool In the article Prolexic released the first quarter of 2014 Global DDoS attack report published by quickshield, we learned that the attack traffic initiated by the "Reflection amplification" technology

its CC server, including obtaining the time and target of the start of the DDoS attack, uploading the information stolen from the host, and timing to encrypt the infected machine file. Why malware need unsolicited and cc service communication? Because in most cases malware is downloaded to the infected host by means of phishing emails , the attacker is not able to actively know who downloaded the malware a

anomalous incursion based on illegal data. The barrier anomaly is based on anomalies that are not normally disposed of by warehouses (even if they are completely legal from a normative point of view). The famous "Ping of Death" is about the massive (but still legitimate) ICMP Echo solicitation packet. If the packet has the same source address, policy address and port, it is still legal, but it is harmful to the IP protocol stack. Stale land incursions have revitalized become imland and are dam

determine if the site has a SYN attack:by right-clicking on the Network Neighborhood and selecting Properties double-click the NIC to see the data, the packets received more than 500 per second, you can be judged to have been synflood DDoS attack. Another way is to click Start, select Run, enter cmd, pop up the cmd window, type the command: C:\netstat-na, if received a large number of syn_received connectio

suddenly rise, looked at the ranking, "Wu Move the Universe" This word incredibly to the Baidu home page, so in the article inserted links, many sites to collect, get a lot of outside the chain. By March, the site incredibly to the second home page Baidu, although only persisted for three days, immediately fell to the fifth, but those days every day has 100,000 IP, at that time cut a map (with the plug-in of shielding ads, so no promotional links). The website traffic is big, some peo

In recent days the company's official website and Business System registration page frequently encountered DDoS attacks, resulting in the IIS application pool CPU occupancy rate of 100%, access to the site 503 errors. The following is a summary of the response measures. First, enable the CPU monitoring features of IIS For low frequency DDoS, this approach can be taken. W3wp.exe is an application pool-rela

Analysis of the method of using hash conflict vulnerability in PHP for DDoS attack This article mainly introduces the method that PHP uses the hash conflict vulnerability to carry out DDoS attack, and analyzes the principle and implementation technique of using hash for DDoS