botnet prevention

§. Preface This article is intended for some friends who are interested in network security and are not familiar with Unix intrusion and prevention. This document describes how to effectively defend against attacks on Unix hosts. §. Unix features The popularity of Unix is definitely not accidental. This is inseparable from the outstanding characteristics of Unix itself, that is: 1. Strong portability; 2. Ability to start asynchronous processes; 3. Con

Hello everyone. Today's course: ASP + ACCESS prevention Author: David Source: China Network Security Association-http://chinansa.com -----------------------------------------------Today, I am bored. I found ASP security in Baidu, But I found N intrusion tutorials, but there are relatively few Security Configuration materials. at present, most articles teach you how to intrude. Here I will talk about how to defend myself. we hope to introduce more disc

Prevention of data leakage: Five data management methods in 2018 and five data management methods in 2018 Many people have heard of the saying "data is King", but such expression may have a completely new meaning in 2018. With the explosive growth of data at an unprecedented level, many things are happening in today's market. Compliance with regulations is no longer a choice but a requirement. Enterprises adopt multi-cloud services and are committed t

Discussion on JS Memory leakage methods and prevention methods (2), discussion on js Concept WHAT: Memory leakage means that a piece of allocated memory can neither be used nor recycled until the browser process ends. Normally, the garbage collector recycles DOM elements and event processors when they are not referenced or accessed. However, memory leakage in earlier versions of IE (IE7 and earlier) is very likely to occur,

address to the MAC address. However, if the computer is restarted, the function will disappear. Therefore, you can make this command into a batch processing file and put it in the startup of the operating system. The batch processing file can be written as follows:@ Echo offArp-dArp-sro lan ip router LAN MAC Find the attack source for the Intranet that has an arp attack. Method: run the arp-a command in DOS to check whether the MAC address of the gateway is the same as that of the real MAC addr

Network Time Protocol (NTP. The protocol used for local and remote NTP server time synchronization. I have played so many protocols that I have never paid much attention to them. I read the articles of Linxinsnow and Longas, And then I studied it. It is recorded as a note. I will not write more details about this protocol. You can simply describe it. The specific details are far more complex than the NTP protocol, but it is not very simple. 1. Send NTP data packets locally to the remote NTP serv

Article Title: Analysis and Prevention of the Linux intrusion tool Knark. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. This article discusses some backdoor technologies that attackers often use after successful intrusion in Linux, and one of the most famous rootkit tools? Knark makes a detailed analysis and poin

is locked. Of course, using Captcha is a good solution.12) Protocol-level attacksThere are many protocol-specific attacks, such as tcp syn flood attacks and ICMP attacks. These attacks have some characteristics and can be filtered by firewall rules. There are also some attacks that cannot be handled through the firewall, such as SSL Beast attacks, which are initiated by exploiting the implementation defects of earlier versions of SSL and TLS, in this case, you need to upgrade to the latest vers

whitelist. For example, only The existing XSS filter module is node-validator and js-xss written by @ Lei zongmin. The XSS module cannot prevent arbitrary XSS attacks, but at least it can filter out most of the vulnerabilities that can be imagined. Node-validator's XSS () still has bugs. For codes in the XSS attacks caused by the template engine The cnode community uses ejs as the template engine. In ejs, two methods are provided to output dynamic data to the page: All filters must have one

identity must be verified again, but many programmers often ignore this. If attackers know the path and file name of these pages, they can bypass authentication and directly access the page. For example, you must log in through the login. asp page and go to the manage. asp page only after authentication. Attackers can directly access the management interface through http: // www. ***. com/manage. asp.Solution: confirm the identity at the beginning of these pages. For example, after the authenti

seen in some way, the consequences are serious. Prevention Tips: programs involving user names and passwords are best encapsulated on the server end and appear in ASP files as few as possible. Users and passwords involving database connections should be given the minimum permission. Usernames and passwords that appear frequently can be written in concealed include files in one location. If it involves connecting to a database, you can only grant it t

knowledge-based pattern matching IDS can be avoided.5. disassemble the string through the "+" sign and bypass it,For example, or 'sword' = 'sw '+ 'ords'; EXEC ('in' + 'sert into' + '..... ')6. bypass through LIKE, for example, or 'sword' LIKE 'sw'7. bypass through IN, such as or 'sword' IN ('sword ')8. bypass through BETWEEN, for example, or 'sword' BETWEEN 'rw 'AND 'tw'9. Pass> or Or 'sword'> 'sw'Or 'sword' Or 1 10. Bypass Using comment statements:Use/**/to replace spaces, such:UNION/**/SELECT

that are always used for Command Execution"'Character string Differentiation/-Command parameters refer to the regular characters used"./¥ Directory refers to the regular characters used$ Environment variable refers to the regular characters used({[]}) Delimiter between commands4. Line Feed Code Injection)In the user's input information, check whether the line feed input "0x0d" and "0x0a" is not included.5. LDAP Injection)When using LDAP, check whether the user input does not contain the followi

This article introduces three Google hacking tools: Gooscan, SiteDigger, and Wikto, as well as simple prevention of Google hacking behavior.Before we prevent google hacker, let's take a look at what google hackers are?Google hackers are a hacker technology that uses Google search engines and other Google applications to find configuration and security vulnerabilities in website code.Google is a powerful search engine that can do many things and is a v

paralysis, information theft, data tampering, illegal access, transmission theft, and data interception, potential hazards such as interface interception. 2. At present, the main prevention policies and deficiencies of the network system of the electronic file center are as follows. At present, the main protection policies of the network system of the electronic file center are firewall technology and intrusion detection technology, but these two tec

Technical Discussion and prevention measures for brute-force FTP server crackingWith the development of the Internet, a large number of silly hacking tools have emerged, and the threshold for any hacker attack means has been greatly reduced. However, the creation of brute force cracking tools has become very easy, we usually think that the brute-force cracking attack is only an attack on an FTP server. Is it representative? Can be expanded to other ne

OSS 8.2.0 does not allow you to upload files with extensions such as asp, asa, cer, and htr. Even if you add files of this type to the background, they cannot be uploaded successfully! However, files with the. php suffix can be uploaded! Go to the background and find "Forum layout management" under "common shortcuts ".Find a forum, go to "Advanced Settings", find "Upload file type", and add the previous PHP file type. Click "Submit" to save the settings. Post to the front-end and upload the php

successful authentication to collect information. Attackers may then write a simple script, send various XPath injections, and extract XML documents from the system, as described in Klein's paper. XPath injection prevention Because XPath injection attacks are similar to SQL injection attacks, many preventive methods are similar. Most of these preventive methods can be used similarly to prevent other types of code injection attacks. Authentication Reg

Rootkit classification, see Wikipedia-Rootkit ). How to handle Rootkit detected when you scan your computer: First, delete the detected file and scan the virus again. If many infected files are found, reinstall your operating system to completely solve the damage caused by Rootkit, rootkit is highly appealing. Therefore, we recommend that you install anti-virus software immediately after you reinstall the operating system. In addition, if the previously retained installation files (for example,

versions of libraries and compilers can also cause problems, because the new version of the library may contain previous versions of theSymbols and descriptions.7. The use of inline and non-inline compilation options in different modules can cause LNK2001. If you open a function inline (/ob1 or/OB2) when you create a C + + library, but you close the function inline (without the inline keyword) in the corresponding header file that describes the function, you get the error message. To avoid this