how to smurf attack

ICMP flood attack in Linux programming and linuxicmp Flood AttackIn my previous article "PING implementation in Linux programming", I used the ICMP protocol to implement the PING program. In addition to implementing such a PING program, what other unknown or interesting uses does ICMP have? Here I will introduce ICMP, another famous black technology: ICMP flood attack. ICMP flood attacks are one of the most

Reason PHP script part of the source code: Copy the Code code as follows: $fp = Fsockopen ("udp://$ip", $rand, $errno, $ERRSTR, 5);if ($fp) {Fwrite ($fp, $out);Fclose ($FP); PHP script in the Fsockopen function, to the external address, through the UDP send a large number of packets, attack each other. Response You can disable the Fsockopen function through php.ini, and use Windows 2003 Security Policy to mask the UDP port on this computer. disabling

First you need to declare. This is purely without foresight and a bit of talent to develop a silly view, only for Web reference systems security.1. HTTP parameter injection attackThe parameters, which are used as a reference in the backend HTTP request, can cause an HTTP parameter injection.A rotten self-thought out, for example:One-to-peer transfer system: money, where to go (from).A very easy system. Developed in order to reuse the code. An inferred character (check) was added. Of course, this

return the record in the cache once a customer queries it. Preventive Measures to Prevent DNS attacks DNS amplification attacks on the Internet is growing rapidly. This attack is a large variety of data packets that can generate a large number of fake communications for a target. How many fake communications are there? Several gigabytes per second, enough to prevent anyone from accessing the Internet. Similar to the old-fashioned "

... Previous Stack parameter 1 The address to which the previous stack was run Start address of previous stack Parameter n ... Parameter 1 After 3, you can see that the whole function exits, and the stack pointer goes back to the stack of the calling function. This completes the complete function call, and also completes the stack-in

SQL injection, XSS attack, CSRF attack SQL injection what is SQL injectionSQL injection, as the name implies, is an attack by injecting a SQL command, or rather an attacker inserting a SQL command into a Web form or a query string that requests parameters to submit to the server, allowing the server to execute a malicious SQL command written.For Web developers, S

address of the computer infected with viruses and the physical address of the network card.3. Set ARP tables to avoid the impact of ARP spoofing on trojansThis method can reduce the impact of other computers of the Trojan on the machine to some extent. Use the method described above to determine the correct gateway IP address and gateway physical address, and then enter and execute the following command in the "command prompt" window:ARP-s gateway IP Gateway physical address4. Static ARP bindin

Php ddos attack solution, phpddos attack. Solutions to php ddos attacks: phpddos attacks this article describes how to solve php ddos attacks. Share it with you for your reference. The specific analysis is as follows: Today, one of my machine's php ddos attack Solutions, phpddos attacks This article describes how to solve php ddos attacks. Share it with you for

the destination mailbox, which causes the destination mailbox to explode and be unusable The manifestation of an e-mail attack: Mail bombs Mail spoofing 7>. Dos attack DOS is called a denial of service attack, it sends a large number of packets to the host in a short time, consumes the host resources, causes system overload or system paralysis, denies the n

PHP Common Vulnerability Attack analysis, PHP vulnerability attack Summary: PHP program is not impregnable, with the extensive use of PHP, some hackers are also in the absence of the trouble to find PHP, through the PHP program vulnerability to attack is one of them. In the section, we will analyze the security of PHP from the aspects of global variables, remote

Attack Android injection "3", attack android "3"I continue to detail the technical solution for Injection through ptrace in "II". In this chapter, I will introduce a unique Injection Technology on Android, named -- Component Injection. As the name suggests, this method is related to Android components. For details, see the following description.The principle of Component Injection is described as follows in

PHP attack website defense code-and attack code anti-translation. This is a code I accidentally attacked a website and found. PHP effectively intercepts my DDOS attacks? Php query prohibited IP $ ip $ _ SERVER [REMOTE_ADDR]; $ fileht. htaccess2; if (! File_exists ($ file: This is a code I accidentally attacked a website and found. PHP effectively blocks my DDOS attacks. // Query the forbidden IP address $

still released the code, which would allow malicious hackers to exploit it. Microsoft then released a patch in Tuesday to fix the two vulnerabilities, but understandably, the company is dissatisfied with Google's move to disclose details of security breaches, as Microsoft is not only preparing patches but is also about to release them. industry insiders point out that the details of public disclosure of security breaches prior to the release of the patch are only helpful to a very small number

Crawlers-100 million lines of comics against attack, and 100 million lines of crawlers against attack Xiaomiao's nagging words: this blog is about using python to write a crawler tool. Why write this crawler? The reason is that after watching the animated film "The Dark burcirt", meow wants to see cartoons again. The results show that all the major apps have no resources, so it's hard to find a website to v

Attack python Article 3: basic, attack python Article 3Basic collection sequence unpacking Example: >>>x,y,z=1,2,3>>>print x,y,z1 2 3 It's okay to exchange variables. >>> X, y = y, x >>> print x, y, z2 1 3 # This is very practical.This feature is particularly useful when a function or method returns tuples (or other sequences or iteratable objects. If you need to obtain (and delete) any key-value pairs in

Today, the scanner mistakenly reported the flaw, I think it is a false alarm.Take the opportunity to understand, as if for the NoSQL and Nodejs service side, I think it may be JS for Nodejs is executable code, that is, arbitrary code execution, such an attack.There's a http://stackoverflow.com/questions/27879131/server-side-javascript-code-injection-attack on StackOverflow.Coincidentally, it seems that I and he used the same scan tool, with the same p

receive the ACK package from the client, it will wait. this status is called semi-connection. It will remain for a certain period of time (different operating systems at different times). if The SYN request exceeds the server's capacity limit and the buffer queue is full, the server will no longer receive new requests, connections of other legal users are rejected. This type of attack is often half a "sin", and is extremely lethal. 　　 Of course, ther

Due to the inherent deficiency of IIS, it is easy for intruders to identify the category of the system. Believe it? Telnet to a system with IIS installed and enter a get command to check what is going on? As shown in 1, the system tells you without reservation that this system uses IIS5.0, which indirectly indicates that "I" is Windows 2000. Figure 1 A little scared? Okay. Now let's attack the virus and let the IIS display information be changed accor

Due to the inherent deficiency of IIS, it is easy for intruders to identify the category of the system. Believe it? Telnet to a system with IIS installed and enter a get command to check what is going on? As shown in 1, the system tells you without reservation that this system uses IIS5.0, which indirectly indicates that "I" is Windows 2000. A little scared? Okay. Now let's attack the virus and let the IIS display information be changed according to

Prevent SYN attacks (one of the Ddoos attacks) The code is as follows Copy Code Iptables-i input-p tcp--syn-m limit--limit 1/s-j ACCEPTIptables-i forward-p tcp--syn-m limit--limit 1/s-j ACCEPT Prevent various port scans The code is as follows Copy Code Iptables-a forward-p tcp--tcp-flags syn,ack,fin,rst rst-m limit--limit 1/s-j ACCEPT Ping flood Attack (ping of Death)