Analysis of IP fragmentation and common fragment attacks

Preface This article analyzes the linux IP assembly algorithm. Because IP fragments are often used for DOS attacks, I will further describe them in combination with some attack methods. The kernel version is 2.2.16, and some changes in 2.4.0-test3

Skills required for Internet cafes

1. Download broken:A. put some download tools such as thunder and flashget on the QQ network hard drive. One problem is that QQ hard drive cannot be opened in the internet cafe (no hard drive plug-in is available ), at this time, we can switch to

Top 10 Intranet security technologies

Almost all enterprises have paid more attention to network security. They have successively purchased firewalls and other devices to block security factors from the Internet. However, Intranet attacks and intrusions are still rampant. Facts have

Don't be afraid of strangers! Four universal methods for dealing with bundled Trojans

Nowadays, Trojans are increasingly tricky. They often use file bundling methods to bundle Trojans into common files such as images and plain text, then, these files are sent to the victims through QQ, Email, or MSN. Once these files are opened

Control Network Security through vro

Nowadays, many home users access the Internet through ADSL or similar broadband provided by other companies. Because of the low cost of broadband, it is a waste of resources for most home users who do not have a large amount of data to download. So

Data Encryption 3: file encryption

  File encryption: If the system encryption is compared to "locking the door", if the "door lock" is opened by a "thief", everything in our computer will be readily available. However, if we lock the "valuable" items in the computer one by one, it

Let's take you through the QQ Secure Login mode.

The login mode of QQ Versions later than 2004 can be selected by the user, while the normal mode is suitable for choosing at home or personal office dedicated computers; the office mode focuses on office environment communication; when you exit in

Windows System Security Settings-intermediate security

1. Use win2000 security configuration tools to configure policies Microsoft provides a set of security configuration and analysis tools based on MMC (Management Console). With these tools, you can easily configure your servers to meet your

Windows System Security Settings-Advanced Security

  1. Disable DirectDraw This is the requirement of C2 security standards for video cards and memory. Disabling DirectDraw may affect some programs that require DirectX (such as games, playing Starcraft on servers? I'm dizzy ..$%$^ % ^ &??), However,

How to manually kill Trojans

The full name of a Trojan is Trojan Horse. First of all, you must know the types of Trojans. A Trojan is a type of virus and serves as a function similar to a spyware. There have been many types of Trojans since their birth, and Trojan horses are

Tips for Personal Computer Security

Most of the operating systems used by home computers are Win XP and Win2000 pro. (We recommend that you change the OS using 98, why do you still use a system that Microsoft has abandoned ?) So I will focus on the security protection based on these

Five types of dangerous passwords cannot be set.

Generally, insecure passwords include the following: Type 1: Use the user name/account as the password. Although this password is easy to remember, its security is almost 0. Because almost all hacker software that uses password cracking as a means

Creating 100% absolutely secure PCs

Currently, most of the operating systems used by home computers are WinXP and Win2000 pro (we recommend that you change the OS with 98 friends, why do you still use a system that Microsoft has abandoned ?) So I will focus on the security protection

Comparison with the bundle downloading by BT

Analysis on the bundle of horses -- shelling -- unlocking the scam -- learning his technology The present era .. A bundle of horses becomes a wind, and everything is a bundle of horses. All kinds of methods have come out .. Even a game needs a

SQL Server latest vulnerability Solution

SQL server 2000 has many vulnerabilitiesSome time ago, my own server experienced a temporary SQL stored procedure vulnerability.Vulnerability Extension: xp_dirtree Stored Procedure Beforehand: A recent vulnerability was discovered on the SQL

Relationship between net.exeand net1.exe

C: WINDOWSsystem32> net user \ FUCK User Account -------------------------------------------------------------------------------Admin Administrator GuestSUPPORT_388945a0The command is successfully completed. C: WINDOWSsystem32> net1 user \ FUCK User

FAQs about IIS Intrusion Prevention for VM instances

1. How to Run asp scripts with the system permission? Modify the virtual directory corresponding to your asp script and change "application protection" to "low ".... 2. How to Prevent asp Trojans? Asp Trojan Based on FileSystemObject

Network Security: Common malicious web page recruitment and Prevention

1. Computer prohibited Symptom Description: although the network hooligans do not use this trick much, once you make a move, the consequences are really unimaginable! The consequence of browsing a webpage containing such malicious code is: "Shut

I intrude into you! How did you find me?

For example, I used 3389 to remotely log on to your machine. What method do you usually use to query me? What should you do if I change GUEST to manage permissions? And I will clear the logs .. "Reply: I intrude into you! How did you find me? " 1.

Solve the Serv-U permission Escalation Vulnerability from the source

Serv-U is now the mainstream FTP Server. like Windows, because many users are used, many people are studying and trying to crack it. As a result, many more vulnerabilities are discovered than the G6 FTP Server. I often hear that Serv-U on someone's

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