how to prevent phishing attacks

This article introduces how Iptables limits the number of connections of the same IP address in linux to prevent CC/DDOS attacks. This is only the most basic method. If the attack is real, we still need hardware compaction to prevent it. 1. Set the maximum number of connections to port 80 to 10, which can be customized. The Code is as follows: Copy c

Native JS achieves carousel effects + pre-school experience (to prevent flooding attacks), and js gets mad Plug-in! Plug-in! I heard someone ask for this plug-in every day. Of course, using a third-party plug-in can greatly improve development efficiency. But as a newbie, I still like to implement it myself, mainly because I have time! Today, I will share with you how to use native JS to implement image car

Tags: pass stat pps NEC connection status exe setting ATI 1 /// 2 ///parameterized queries prevent SQL injection attacks3 /// 4 Public intChecklogin (stringLoginName,stringloginpwd)5 { 6 stringstrSQL ="Select COUNT (*) from tb_loginuser where [email protected] and [email protected]"; 7SqlConnection conn =NewSqlConnection (configurationmanager.appsettings["Constr"]); 8 if(Conn. State.equals (connectionstate.closed))//

About the use of Html.antiforgerytoken () in fact, many of the online explanation, such as http://blog.csdn.net/cpytiger/article/details/8781457So what do we do with Ajax calls, and do we need to modify all of the AJAX request data? I prefer to write a generic code. The principle is simply to intercept AJAX requests and append your own data. Note that when Ajax transmits data, it can be string/. Object, so here's what you need to deal with:if (typeof data!== "string") {data = $.param (data);}In

There are two ways to prevent SQL injection attacks: 1) The first is that all SQL statements are stored in the stored procedure, which not only avoids SQL injection, but also improves performance. In addition, the stored procedure can have a dedicated database administrator (DBA) writing and centralized management; however, this method sometimes has different query conditions for the same tables, and SQL s

Analysis of PHP programs to prevent ddos, dns, and cluster server attacks. To put it bluntly, copy the code as follows :? Php query prohibited IP $ ip $ _ SERVER [REMOTE_ADDR]; $ fileht. htaccess2; if (! File_exists ($ fileht) file_put_contents ($ fileht, not much nonsense, on the code The code is as follows: // Query the forbidden IP address$ Ip = $ _ SERVER ['remote _ ADDR '];$ Fileht = ". htaccess2 "

, and if so, the request is legitimate.Third, for Ajax complex objects, such as [{"id": "001", "Name": "Xiao Ming"},{"id": "002", "name": "Small Army"}]., Background post processingThis object must be converted to JSON format to the background, and the background is deserialized. (Do not use the other serialization format of Ajax, after the depth of serialization, Django background parsing is more difficult)ContentType no need to specify Utf-8, otherwise post parsing errorIv. CSRF Attack and pre

How does Weibo open many API interfaces to the outside to ensure their security and prevent attacks? do you know the principle? Reply to discussion (solution) Generally, the/weibo common interface requires the token/openid. This means that most of the mixed water has been stuck, and the advanced interface also needs to be authenticated or applied, and other interfaces are listened, exceptions will be

One of the major puzzles is how to effectively prevent CSRF attacks. $ _ SERVER ['http _ referer'] However, some articles have pointed out that Referer can forge For example Header ("referer: www.aaa.com ") ...... ?> I tried it. it seems that the referer changed when I sent it using the header on the console. However, $ _ SERVER ['http _ referer'] is empty, indicating that it seems no problem. So what if

When creating a login form, if you do not pay attention to it, it is very likely that there is a problem in writing code. When designing a login form, beginners prefer to use this method for login design. String sqlcon = "data source =. \ sqlexpress; database = MyCy; uid = sa; pwd = 123456 ;" String SQL = "select * from tb_user where username = '" + txtuser. text + "' and userpwd = '" + txtpwd. text + "'"; SqlCommand cmd = new SqlCommand (SQL, sqlcon ); In this way, when you enter single quotes

How to Prevent PHPDDOS from sending packets Copy codeThe Code is as follows: if (eregi ("ddos-udp", $ read )){ Fputs ($ verbinden, "privmsg $ Channel: ddos-udp-started udp flood-$ read2 [4] \ n "); $ Fp = fsockopen ("udp: // $ read2 [4]", 500, $ errno, $ errstr, 30 ); If (! $ Fp) { $ Fp = fsockopen ("udp: // $ read2 [4]", 500, $ errno, $ errstr, 30 ); Since the fsockopen () function is used to request external data, the request is not allowed. Set in

PHPMYSQL injection attacks need to prevent 7 points bitsCN.com 1: numeric parameters are forcibly filtered using methods like intval and floatval. 2: string parameters are forcibly filtered using methods like mysql_real_escape_string, rather than simple addslashes. 3: it is best to discard the splicing SQL query method like mysql_query and try to use the PDO prepare binding method. 4: Use rewrite techno

This article provides a detailed analysis of PHP programs to prevent ddos, dns, and cluster server attacks. The code is as follows: // Query the forbidden IP address$ Ip = $ _ SERVER ['remote _ ADDR '];$ Fileht = ". htaccess2 ";If (! File_exists ($ fileht ))File_put_contents ($ fileht ,"");$ Filehtarr = @ file ($ fileht );If (in_array ($ ip. "\ r \ n", $ filehtarr ))Die ("Warning :".""." Your IP address

How to prevent local users from using fsockopen for DDOS attacks in the IIS environment /* From: http://bbs.it-home.org Date: 2013/2/17 */ $ Fp = fsockopen ("udp: // $ ip", $ rand, $ errno, $ errstr, 5 ); If ($ fp ){ Fwrite ($ fp, $ out ); Fclose ($ fp ); ?> In this case, you can modify php. ini, disable the fsockopen function, an

Have you been worried about how to prevent XSS attacks? Try nhtmlfilter. I think it is what you want .. Recently, a new small company is very weak in. NET web development. The underlying framework and basic library are not perfect. It is also an Internet application, so security always needs to be considered. One small problem I want to solve today is to filter out the scripts in the HTML text uploaded by

= Antiforgerycookie! =NULL?Antiforgerycookie.value:NULL; //verification of anti-counterfeiting marks from cookies and Headers//You can add try-catch here .Antiforgery.validate (Cookievalue, request.) headers["__requestverificationtoken"]); } Else { NewValidateantiforgerytokenattribute (). Onauthorization (Filtercontext); } } } } }Here comment out the Ajax in the security tag in the reques

An example of iptables anti-DDoS method Mitigating DDoS attacks#防止SYN攻击, lightweight prevention Iptables-n Syn-floodIptables-a input-p tcp–syn-j Syn-floodIptables-i syn-flood-p tcp-m limit–limit 3/s–limit-burst 6-j returnIptables-a syn-flood-j REJECT #防止DOS太多连接进来, you can allow the external network card to each IP up to 15 initial connections, over the discarded Iptables-a input-i eth0-p tcp–syn-m connlimit–connlimit-above 15-j DROPIptables-a inpu

In the View//self-written filter1 Public classMyvalidateantiforgerytokenattribute:fileterattribute,iauthorizationfilter2 {3 Private voidValidaterequestheader (httprequestbase request)4 { 5 stringcookietoken="";6 stringfromtoken="";7 stringTokenvalue=request. header["Requestverificationtoken"];8 if(!string. IsNullOrEmpty (tokenvalue))9 {Ten string[] Tokens=tokenvalue.split (':'); One if(Tokens. Length=2) A { -cook

Often see in the project Ajax post data to the server without security tags, resulting in csrf attacks Adding a security tag to asp.net mvc is simply adding Html.antiforgerytoken () to the form. Html.antiforgerytoken () generates a pair of encrypted strings, stored in cookies and input respectively. We also brought AntiForgeryToken in the Ajax post. @model WebApplication1.Controllers.Person @{viewbag.title = "Index";} An encrypted string p

The function used to prevent SQL injection attacks can be used directly, but we will not use it, but we need to enhance our safety awareness. Copy Code code as follows: '========================== ' Filter the SQL in the submission form '========================== function Forsqlform () Dim fqys,errc,i,items Dim Nothis (18) Nothis (0) = "NET user" Nothis (1) = "xp_cmdshell" Nothis (2) =