how to prevent dns attacks

How To Disable IP address modification and prevent lan ip conflict attacks on LAN computersHow can I prevent LAN computers from modifying IP addresses and preventing LAN IP conflict attacks? The author believes that it can be implemented through the following channels:Method 1: Disable IP address modification in the re

. Prohibit the use of network access programs such as Telnet, Ftp, Rsh, Rlogin and Rcp, and replace them with PKI-based access programs such as SSH. SSH does not send passwords in plain text format on the Internet, while Telnet and Rlogin are the opposite. Hackers can find these passwords and access important servers on the network immediately. In addition, the. rhost and hosts. equiv files should be deleted on Unix. Because you do not need to guess the password, these files will provide logon a

Apache server's defense against DoS attacks is mainly implemented through the Apache DoS Evasive Maneuvers Module. It is an alternative to mod_access and can defend against DoS attacks. The software can quickly reject repeated requests from the same address to the same URL by querying a hash table of each sub-process. Download the software at http://online.securityfocus.com/data/tools/dospatch.tar.gz. Fo

Security company Sucuri said in March 9 that hackers used more than 162000 WordPress websites to launch DDoS attacks to the target website. all requests were random values (such? 4137049643182 ?), Therefore, the cache is bypassed, forcing every page to be reloaded. Security company Sucuri said in March 9 that hackers used more than 162000 WordPress websites to launch DDoS attacks to the target website. all

[Jsoup learning gift Note] eliminates untrusted HTML (to prevent XSS attacks) and jsoupxssProblem Users are often provided with comments when making websites. Some unfriendly users may make some scripts into the comments, which may damage the behavior of the entire page. More seriously, they need to obtain some confidential information and clear the HTML at this time, to avoid cross-site scripting (XSS)

Copy codeThe Code is as follows :#! /Bin/bash Declare gw = 'route-n | grep-e' ^ 0.0.0.0'' Declare gwname = 'echo $ gw | grep-oe '\ w * $'' Declare gwip = 'echo $ gw | grep-oe '[0-9] \ {2, 3 \}\. [0-9] \ {1, 3 \}\. [0-9] \ {1, 3 \}\. [0-9] \ {1, 3 \}'' Declare gwmac = 'Arp-n | grep-e $ gwip | grep-oe '[0-9A-F] \ {2 \}: [0-9A-F] \ {2 \}: [0-9A-F] \ {2 \}: [0-9A- F] \ {2 \}: [0-9A-F] \ {2 \}: [0-9A-F] \ {2 \}'' Echo "switch $ gwname arp: $ gwip-$ gwmac to static" Arp-s $ gwip $ gwmac Echo "done, of

Can the fence really block a giant monster? So is the firewall really able to withstand apt attacks? The fact that defensive measures are likely to be compromised or lost in circumstances beyond control requires a deeper defense approach.Apt attacks may come from within the defensive point of the perimeter defense design, and consider the following scenarios:External Network onlineBefore the device enters y

, the best way to prevent ARP attacks is to install a simple and strong firewall, such as a very famous, and 100% free Comodo firewall. See figure below: 5, Comodo Firewall installation is very simple, only need to click "Next" to complete the installation, after the installation, we also need to do some configuration, click on the interface of the "Firewall" button, see the following figure: 6, Next

OpenResty (nginx extension) to prevent cc attacksOpenResty (nginx extension) to prevent cc attacksGuideOpenResty integrates a variety of well-designed Nginx modules (mainly developed by the OpenResty Team) to effectively turn Nginx into a powerful universal Web application platform. In this way, Web developers and System Engineers can use the Lua script language to mobilize various C and Lua modules support

This article mainly introduces how to use SCE in AngularJS to prevent XSS attacks and prevent cross-site scripting vulnerabilities by reasonably transcoding to HTML, for more information about the XSS (Cross-Site Scripting) solutions and how to use the SCE ($ sceProvider) and sanitize service features in AngularJS to correctly process XSS, see this article. If I

Functionstrinput ($ input) {$ inputstrval ($ input); $ replacearray (union, load, and, or, select, update, insert, delete, create, char, ascII, ord, conv, --, #, *, %, _, \, function strinput ($ input) { $ Input = strval ($ input ); $ Replace = array ('Union ', 'load', 'and', 'or', 'select', 'update', 'insert', 'delete ', 'create', 'Char ', 'ascii', 'ord ', 'conv',' = ',' -- ',' # ',' * ',' % ', '_','\\','\'',"\""); $ Input = str_ireplace ($ replace, "0", $ input ); Return $ input; } Define a f

How the calling interface written to Android guarantees installation and prevents attacks Write to the Android call interface how to ensure the installation, to prevent attacks, and some said to use oauth2.0 to check the information about oauth2.0 do not understand how I use to ask you to guide ------to solve the idea---------------------- See if you are your own

Suppose SQL is an article that searches for user A, SQL would look like this:SELECT * FROM table where owner= ' A ';SQL injection attackers modify user names to implement attacks, such as changing A to a ' or 1 = ' 1The combined SQL statement:SELECT * FROM table where owner= ' A ' or 1 = ' 1 ';This will allow you to get all the user's articlesIt can be seen that the SQL attack is to falsify part of the data content into SQL statements, such as the abo

Tags: lin div esc private void Ace value one format usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Linq;usingSystem.Text;usingSystem.Windows.Forms;usingSystem.Data.SqlClient; namespace_01 parameterized login to prevent SQL injection attacks { Public Partial classForm1:form { PublicForm1 () {InitializeComponent (); } Private v

service. In this way, although the port is not closed, the service of the local machine to other machines can be suspended. Of course, the sharing of other machines will be suspended. However, disabling this service will cause many related services to fail to start. For example, if there is an IIS service in the machine, this method cannot be used. 5. Use the firewall to prevent attacks In the firewall,

Here, I will share with you some examples and experiences of preventing SQL injection attacks summarized by the webmaster. I hope this tutorial will help you. 1. Configure on the server Security, PHP code writing is one aspect, and PHP configuration is critical. We manually install php. The default configuration file of php is in/usr/local/apache2/conf/php. ini, we mainly need to configure php. the content in ini makes it safer to execute php. The sec

First, IntroductionCSP is the abbreviation for Web Security Policy (Content security Policies). is a developer-defined security Policy statement that specifies a trusted source of content through the responsibilities that are constrained by the CSP (content can refer to remote resources such as scripts, pictures, style, and so on). By using the CSP protocol, you can prevent XSS attacks and allow the web t

Nowadays many switches are able to prevent ARP attack core Layer gateway, but can not be very effective to prevent the attacks between VLANs, to prevent the attack between VLANs, I think using the VLAN vacl to prevent better, security can be improved. Because the company ex

It has become a challenge to seize hackers who secretly put their hands on ADSL users' computers. In fact, as long as you understand the common techniques used by hackers to attack ADSL users and formulate corresponding security policies, you can also comprehensively prevent hacker attacks. Next, I will introduce the methods that hackers often use to attack ADSL users' computers. Hacker attack ADSL user exp