how to prevent dns attacks

logon page: '; Show tables; Click the login key. This page displays all tables in the database. If he uses the following command: '; Drop table [Table name]; In this way, a table is deleted! Of course, this is just a simple example. The actual SQL injection method is much more complicated than this one. hackers are willing to spend a lot of time trying to attack your code. Some program software can also automatically attempt SQL injection attacks. Af

I wrote a simple script to prevent IP attacks-general Linux technology-Linux programming and kernel information. The following is a detailed description. I wrote a simple script to prevent IP attacks. I wrote a simple script to prevent IP

scripts for validation, and you can also insert a method call from the server. If you cannot find a ready-made validation object, you can create one by CustomValidator yourself.⑸encrypt data such as user login name, password, and so on. Encrypt the data entered by the user and compare it with the data saved in the database, which is equivalent to "disinfect" the data entered by the user, and the data entered by the user no longer has any special meaning to the database, thus preventing the atta

Recently, various attacks against VoIP voice gateway devices have frequently occurred, causing many troubles and economic losses to customers. In order to further prevent the VOIP Voice Gateway from being compromised by a network attack or attack, the network technology provides several preventive measures for the security of the voice gateway device, ask the customer to take measures to

categories: 1. General users and 2. website developers. First of all, as a general web product user, we are often passive and used without knowledge. Then we can:1. An independent browser window is required for web application access with higher security levels.2. The best way to copy a link published by a stranger and open it in a new window is to ignore --. For developers, we need to analyze from a relatively detailed perspective:Xss attacks are ch

" dialog box of "Network Neighbor. 3. Disable the Guest account Many intrusions use this account to further obtain the administrator password or permissions. If you don't want to use your computer as a toy for others, you can still deny it. Open the control panel, double-click "user and password", click the "advanced" tab, and then click the "advanced" button. The local user and group window is displayed. Right-click the Guest account, select properties, and select "Account Disabled" on the "Gen

C # How to Prevent replay attacks, Replay attacks A replay attack means that hackers capture packets to obtain client request data and request connections, repeatedly sending requests to the server. For example, you have a "buy" operation. When you click the Buy button, you can send a purchase request to the server. At this time, the hacker captured your request

I have summarized three methods to prevent ARP attacks in Linux: directly binding the gateway method, using related software such as Libnet and arpoison, and using arptables to prevent arp attacks, finally, I wrote the shell script myself. Let's take a look at it. Method 1: bind a gateway Generally, the gateway of the

-LINK TL-R4148 for the special Broadband Router is introduced as an example, how to prevent ARP attacks:If the "IP and MAC Address binding" function is available on the vro, ARP attacks can be effectively prevented. Enable binding IP and MAC addresses when the internet cafe network is normal (1 ), you can create a one-to-one correspondence between MAC and Intranet IP addresses of each computer in the intern

Many forums in China have cross-site scripting vulnerabilities. There are also many such examples in foreign countries, even Google, but they were fixed in early December. (Editor's note: for cross-site scripting attacks, refer to "XSS cross-site scripting attack details"). Cross-site attacks can be easily constructed and are very concealed and difficult to detect (usually jump back to the original page imm

your network. Many companies only allow port 80 (HTTP) and Port 110/25 (email ). In addition, you can block and allow IP addresses and ranges.9. disable unnecessary services: disable unnecessary services on routers, servers, and workstations. Cisco devices provide small services by default through network operating systems, such as echo, chargen and discard ). These services, especially their UDP services, are rarely used for legal purposes. However, these services can be used to launch denial-

host converts the target IP address to the target MAC address before sending the frame. The basic function of ARP is to query the MAC address of the target device through the IP address of the target device to ensure smooth communication. Ii. How ARP works: Only by understanding how ARP works can we effectively prevent ARP attacks. To put it simply, the principle of ARP is: first, each host creates an ARP

following command:'; Drop table [table name];In this way, a table is deleted!Of course, this is just a simple example. The actual SQL injection method is much more complicated than this one. hackers are willing to spend a lot of time trying to attack your code. Some program software can also automatically attempt SQL injection attacks. After understanding the principles of SQL injection attacks, let's take

WPA or WPA2 encryption, it can also be cracked, but the brute-force method is used to crack, that is, the software performs one-by-one guess, while WPA2 is more likely to be outputted.Defense measures against network attacks by others1. encrypted by WPA/WPA2-PSKHackers generally use dummies to crack software. They can only crack WEP-encrypted wireless signals. A Slightly advanced hacker will use packet capture tools to analyze the content in the data

information with the identity information stored on the server. Because SQL commands have been modified by injection attacks and cannot actually authenticate user identities, the system will incorrectly authorize attackers. If the attacker knows that the application will directly use the content entered in the form for identity authentication queries, he will try to input some special SQL strings to tamper with the query and change its original funct

ARP attack is a major hidden danger of Internet Café Network security, it is also the scourge of Internet Café Administrator. It is much easier and more important to prevent ARP attacks than to resolve ARP attacks. How to prevent ARP attack, protect Internet bar network security? You may refer to the following methods:

bandwidth, it is easy to test with a single IP address. Use this tool to achieve: high concurrency, AB, openload and so on. It's just a terminal interface with no UI. Of course you have to test yourself and remember to use the status flag because Blitz will respond to the access request in about 5 seconds. A better alternative There's no further detail here, and if you're serious about blocking DDoS or multi-service attack against your server, there are other great software tools like Iptabl

How can we prevent XSS attacks? my comment function cannot prevent '> script alert (document. cookie) script = '> Script alert (document. cookie) script This type of code attacks, but it doesn't matter if I look at the CSDN Forum. what should I do to prevent such character

security and development are complementary. Section 2. Bypass program restrictions and continue Injection As mentioned in the entry-level article, many users prefer to use the 'number test to inject vulnerabilities. Therefore, many users use the' number filtering method to "Prevent" injection vulnerabilities, this may block some hacker attacks, but those familiar with SQL injection can still use related fu

PHP prevents injection attack instance analysis and php injection instance analysis. Analysis of PHP injection attack prevention examples. This article analyzes php injection attack prevention methods in detail in the form of examples. Share it with you for your reference. The specific analysis is as follows: Analysis of PHP injection protection instances and analysis of php injection instances This article analyzes in detail how PHP can prevent inje