anti ddos protection

Anti-DDoS script # Lightweight prevention against SYN AttacksIptables-N syn-floodIptables-A input-p tcp-syn-J syn-floodIptables-I syn-flood-P TCP-m limit-limit 3/s-limit-burst 6-J returnIptables-a syn-flood-J reject # Prevent too many Dos connections. You can allow up to 15 Initial connections from each IP address of the Internet Nic, exceeding the limit of discardingIptables-A input-I eth0-P TCP-syn-M conn

The main 2 basic practical applications, mainly related to the ban Ping (IPv4) and the prohibition of UDP, that is, the use of the server to prevent hackers to outsource DDoS attack content. First, if there is no iptables prohibit ping echo 1 >/proc/sys/net/ipv4/icmp_echo_igore_all #开启echo 0 >/proc/sys/net/ipv4/icmp_echo_igore_all #关闭 Second, the iptables to prohibit ping the following order: Iptables-i input-i eth0-p icmp-s 0/0-D 0/0-j DROP The

security, you can set the maximum connection, single IP connection, and blacklist!Maximum connections:7000-> 30000 (LoginGate) is set to 40 single IP connection is set to: 207100-> 31000 (SelChrGate) is set to 30 single IP connection is set to: 207200-> 32000 (RunGate) is set to 1000 Single IP connection is set to: 20In this way, we can effectively prevent DDOS attacks or other variant attacks!Defends against SYN attacks!You can set an IP address seg

original content to save the contents as follows# Generated by Iptables-save v1.3.5 on Sun Dec 12 23:55:59 2010*filter: INPUT DROP [385,263:27,864,079]: FORWARD ACCEPT [0:0]: OUTPUT ACCEPT [4,367,656:3,514,692,346]-A input-i lo-j ACCEPT-A input-m state–state related,established-j ACCEPT-A input-p icmp-j ACCEPT-A input-s 127.0.0.1-j ACCEPT-A input-p tcp-m tcp–dport 80-m state–state new-m recent–set–name Web–rsource-A input-p tcp-m tcp–dport 80-m state–state new-m recent–update–seconds 5–hitcount

Several anti-DDoS Methods 1) Use the findwindow API function.You can query the window title (or/and Class Name) to determine whether the program is running. If it is found, it indicates that the program is running, and you can exit the program to achieve the effect of not repeating the operation; otherwise, it indicates that the program is running for the first time.This method is not applicable to situati

ZOJ 3868 (Anti-DDoS principle + fast power) GCD Expectation Time Limit: 4 Seconds Memory Limit: 262144 KB Edward has a setNIntegers {A1,A2 ,...,AN}. He randomly picks a nonempty subset {X1,X2 ,...,XM} (Each nonempty subset has equal probability to be picked), and wowould like to know the expectation [Gcd(X1,X2 ,...,XM)]K. Note thatGcd(X1,X2 ,...,XM) Is the greatest common divisor {X1,X2 ,...,XM}

Enable NGINX anti-CC and DDOS Attack ModuleHttpLimitZoneModule configuration instructions This module makes it possible to limit the number of simultaneous connections for the assigned session or as a special case, from one address. Example configuration Http {limit_zone one $ binary_remote_addr 10 m; server {location/download/{limit_conn one 1 ;}}} HttpLimitReqModule configuration instructions This mo

The application of the anti-DDoS principle and SQL in keywords in EF, sqlef Suddenly realized the importance of words, so I began to write my first blog, with the goal of keeping a close record for ease of understanding. At the same time, I also hope that the brick-and-mortar market can play a role in promoting mutual learning. You are welcome to express your thoughts and thoughts! Background: During the el

The PHP anti-DDoS attack instance code is as follows:

ZOJ 3868 (Anti-DDoS principle + fast power), zoj3868 GCD Expectation Time Limit: 4 Seconds Memory Limit: 262144 KB Edward has a setNIntegers {A1,A2 ,...,AN}. He randomly picks a nonempty subset {X1,X2 ,...,XM} (Each nonempty subset has equal probability to be picked), and wowould like to know the expectation [Gcd(X1,X2 ,...,XM)]K. Note thatGcd(X1,X2 ,...,XM) Is the greatest common divisor {X1,X2

Tags: bzoj, bzoj3589, principle of tree link partitioning and rejection Given a 1-Root tree, each node has a certain privilege and provides two operations: 1. All node weights of the subtree with a node as the root + x 2. Obtain the vertices and consortium of some links. These links are directed to the root node from a node. First, modify the sub-tree, query the link, and split the wt ~ Then, the point permissions of each vertex on these links can only be added once, and cannot be marked. Due to

Anti-DDoS program module indirectly transmits STL instance objects through struct We often pass parameters to functions through struct. In principle, the struct should not contain non-pod members. [Reference]========================================================== ==========================================Pod, short for plain old data, a common old data structure (POD) is a data structure. It is used only

#!/bin/sh#date:2015-12-13#filename:fang-dos.sh #version: v1.0while truedo #awk ' {print $} ' Access_2015-12-15.log|grep-v "^$" |sort|uniq-c >/tmp/tmp.log netstat-an|grep est|awk-f ' [:]+ ' { Print $6} ' |sort|uniq-c >/tmp/tmp.log exec For more information, please visit Li Hing Lee BlogShell anti-DDoS attack principle

PHP implements anti-leech analysis, and php implements anti-leech Protection This article describes how to implement anti-leech protection in PHP. We will share this with you for your reference. The details are as follows: $_SERVER['HTTP_REFERER']Obtain information Note:$ _

Figure-FileZilla FileZillaAnti-disconnection (Anti-idle and idle protection) The so-called anti-disconnection or anti-idle or idle protection function allows the computer to send a specific piece of information to the FTP server at intervals in idle state, so that the FTP

the methods we have practiced from simplicity to complexity and analyze them briefly. However, unfortunately, these methods cannot completely prevent leeching, and the purpose of anti-leech protection should beReduce the impact of leeching to a certain extent, and allow legal users to download resources from your website in a natural and smooth manner.. Method 1: Determine the reference address This method

As the network speed keeps getting faster and the trojan virus increases, we are overwhelmed and struggling. If we don't have anti-virus software, it's really hard to do. Many netizens are asking what anti-virus software and firewall can be configured to ensure Machine security and smooth network connection? It is hard to say that everyone's machine configuration, application requirements, and usage habits

Php implements anti-Leech protection for image files and downloaded files ,. Php implements anti-Leech protection for image files and downloaded files. This document describes how php implements anti-Leech protection for image fil

ArticleDirectory Use a blank image to overwrite a real image Picmarkr (details) Watermarktool Other PHP solutions: ASP. NET solution: Ruby solution: Swfir (details) Disable right-click menu Disable IE6 image toolbar Introduction: This is a detailed page of 10 anti-leech protection methods. It introduces PHP, related knowledge, skills, experience, and some PHP source c

1, usually the DC power input anti-reverse protection circuit is to use the unidirectional conductivity of the diode to achieve anti-reverse protection. As shown in 1:This method of connection is simple and reliable, but the power dissipation effect is very large when the large current is input. To the input current ra