how to smurf attack

cooperate with dedicated security devices to improve the security of the vro itself and the availability of the managed network segments. To protect the security of the router, we must also consider the configuration of the router. Generally, the router configuration method can be configured through the main control Console port connected to the terminal; the Modem connected to the telephone network at the AUX port, so as to be configured remotely; on the TCP/IP network, you can use the virtual

Mobile Game Development Attack and Defense-1. Game Engine selection and mobile game development Attack and Defense Engine Now mobile games fire of a mess, engine is also endless in addition to leading the 3D market Unity3D, Duba 2D market Cocos2D-X, as well as illusory, Sphinx and so on, and even Sohu has developed a domestic Genesis-3D engine. Others are not much, here mainly compare Unity3D and Cocos2D-X,

New Bank Trojan Anubis attack, a collection of ransomware, keyboard recorder, remote Trojan, anubis attack According to PhishLabs, a network security company, in 5th day of this month, they discovered a new variant of the Bank Trojan BankBot, which is being disseminated by disguising it as a legitimate application of Adobe Flash Player, Avito, and HD Video Player. PhishLabs indicates that the new variant na

only * * @author Fan Fangming */ Public class xpathloginaction extends actionsupport { PublicStringExecute()throwsException {return "Success"; } Public Boolean Getxpathinfo(string username, string password)throwsException {documentbuilderfactory domfactory = documentbuilderfactory.newinstance (); Domfactory.setnamespaceaware (true); Documentbuilder builder = Domfactory.newdocumentbuilder (); Xpathfactory factory = Xpathfactory.newinstance (); XPath XPath = Factory.newx

Attack Android injection "1", attack android "1"PrefaceThis series was originally shared by the company and has a large amount of content. Therefore, we reorganized this PPT into a blog, hoping to help you learn it. I will first use an "text message interception" as an example to throw a problem and propose a "injection"-based technical solution to increase the interception priority. Then I will focus on th

This article illustrates the YII framework's approach to preventing SQL injection, XSS attacks, and csrf attacks. Share to everyone for your reference, specific as follows: The methods commonly used in PHP are: /* Anti-SQL injection, XSS attack (1)/function Actionclean ($str) {$str =trim ($STR); $str =strip_tags ($STR); $str =stripslashes ($STR); $str =addslashes ($STR); $str =rawurldecode ($STR); $str =quotemeta ($STR);

The root cause of SQL injection attacks is the vulnerability of SQL specifications, but because of the long-term existence and use of the specification, it is almost impossible to modify the specification, only from the developer itself to avoid attacks, although the SQL injection is very serious, but now relatively well controlled, here just as a learning content.The test process is as follows:1: Build php,mysql development environment, can see my other blog custom development PHP Environment2:

receives a packet greater than 65,535 bytes, and perform a system audit. 3.Smurf attack: Send a disguised ICMP packet, the destination is set to the broadcast address of a network, the source address is set to attack the destination host, so that all the host receiving this ICMP packet will send a response to the destination host, so that the attacked host in

The core switch is currently the most commonly used networking device, and its security performance is also good. However, improper use may also cause some problems. There are blue sky and white clouds on the Internet, there is also a hidden underflow, if you do not pay attention to it, a variety of network viruses may be "not please come ". In the event of a network virus attack on a LAN, the Internet access speed is not normal. In severe cases, the

Like smurf Currently, many DNS servers support EDNS. EDNS is an extended DNS mechanism, which is introduced in RFC 2671. Some options allow the DNS to reply to more than 512 bytes and still use UDP, if the requestor points that it can handle such a large DNS query. Attackers have used this method to produce a large amount of communication. By sending a query of 60 bytes to obtain a record of about 4000 bytes, attackers can increase the communication

different attack methods. 2.1 principles of bandwidth-based DoS 2.1.1 attacks-ICMP echo reply indicates that stationery has a high forwarding priority-attackers send a large number of source IP addresses to the attacked host for forgery (nonexistent) ICMP echo request message of the attacker. The host cannot reply to the attacker (echo reply). The bandwidth of the attacker is occupied, failure to respond to normal services this

test. 2. Disable IP Direct Broadcast (IP Directed Broadcast) Your server is very obedient. Let it do what it does, and no matter who sends the command. Smurf attacks are DoS attacks. In this attack, attackers use fake source addresses to send an "ICMP echo" request to your network broadcast address. This requires all hosts to respond to this broadcast request. This situation will at least reduce your netwo

From the 07 of the Estonian DDoS information war, to this year Guangxi Nanning 30 internet cafes suffered from DDoS ransomware, and then to the Sina network suffered a DDoS attack can not provide external services for more than 500 minutes. DDoS intensified, attacks increased significantly, the attack traffic is also significantly increased, the situation is very serious, more than 1G of

Return-into-libc Attack and Defense This article first analyzes the principles of return-into-libc attacks, and introduces the experimental processes and results of traditional return-into-libc attacks on different platforms. Then, this article further introduces and explains the attack methods of the return-oriented programming. This attack can make up for the s

1. Common DDos attack types SYN Flood: it is currently the most popular DoS (DoS attacks) and is a type of TCP connection request that uses TCP protocol defects to send a large number of forged TCP connection requests, so that the attacked party's resources are exhausted (the CPU is full or the memory is insufficient. Smurf: This attack sends a packet with a spec

I. Distributed blocking services (distributed denial of service) DDoS is a special case of DoS, hackers use multiple machines to attack at the same time to prevent normal users to use the service. After hackers have invaded a large number of hosts beforehand, to install DDoS attack on the victim host to attack the target; some DDoS tools use a multi-level archit

The following article describes the prevention of four levels of attack to ensure the security of Linux servers, if you are against four levels of attack to ensure that the Linux server security is curious, the following article will uncover its mystery. With the continuous expansion of Linux enterprise applications. has a large number of network servers that are using the Linux operating system. The secu

With the expansion of Linux enterprise applications, there are a large number of network servers using the Linux operating system. Linux server security can be more and more attention, here according to the depth of the attack on the Linux server in the Level form, and propose different solutions. The definition of a Linux server attack is that an attack is an un

Interruption of services (denial of service) Before discussing DDoS we need to know about DOS, DOS refers to hackers trying to prevent normal users to use the services on the network, such as cutting the building's telephone lines caused users can not talk. and to the network, because of bandwidth, network equipment and server host processing capacity has its limitations, so when the hacker generated excessive network packet so that the device can not be processed, so that normal users can not

DirectoryA backgroundSecond emergency responseThree common DDoS attacks and defensesFour roots and CounterattackFive summary A background A few days ago, we run a Web site has suffered a DDoS attack, our site is a public service nature of the site, for various vendors and white hats to build a platform to convey security issues such as information, we do not know for what reason will encounter this shameless att