opendns whitelist only

Here are some of the potential factors that affect crawl efficiency (official translation): 1) DNS Settings2 The number of your reptiles, too much or too little3) Bandwidth Limit4 The number of threads per host5 The distribution of URLs to crawl is uneven6) High Crawl latency in robots.txt (usually occurs at the same time as the distribution of URLs)7 There are a lot of slow pages (usually with uneven distribution at the same time)8 to download too much content (PDF, large HTML page, usually and

blacklist and whitelist, RBL (Real-Time blacklist) List, Bayesian, and SPF (sender policy framework. Their focus and technical features are different. We need to combine various factors to reasonably reduce the false positives and false negatives of anti-spam. Based on the above common anti-spam technologies, we can find out the causes of false positives and false negatives, and find the crux of the problem so that we can be targeted to better reduce

JSON website www.json.org provides a JSON serialized code base for JavaScript objects-json2.js, which you can obtain from here.After obtaining the json2.js file, you can open the file, which contains a large amount of comments before the file. If your English is good enough, you can omit this section and refer to the comments in this file. As a programmer, you have read a large number of letters and want to see my Chinese characters and letters, then you can continue.Simple translation of this

the # and % symbols into their entities, avoiding hexadecimal attacks and converting UTF-8-encoded data. Finally, you can add an optional $ length parameter to intercept the string with the specified maximum length to prevent some people from crashing by using a long overloaded string.Use SafeHTML The problem with the previous script is relatively simple. it does not allow user tags of any type. Unfortunately, there are hundreds of methods that allow JavaScript to skip user filters and strip a

the maximum length of the submitted data. Use SafeHTML to prevent XSS attacks The above protection against XSS attacks is very simple, but does not contain all the user's tags. at the same time, there are hundreds of methods to bypass the filter function to submit javascript code, and there is no way to completely stop this situation. At present, there is no single script to ensure that the attack will not break through, but there is always a relatively better degree of protection. There are tw

code. When the log file returns, we can see the hash value of the parameter. Previously, the part containing our payload has been replaced by the execution result of the ls command. By now, we have been able to execute system commands with the user permissions of web-server.0x02 solution Mitigation Install a patch for a specific version of Rails If no patch is installed, you can disable rendering of files out of the whitelist. The specific method

Source: http://meiyitianabc.blog.163.com/blog/static/105022127201310562811897/API Permissions Design Summary:Recently in doing API permissions design this piece, do a summary of the authority design.1. Suppose we need access to the API interface is this: http://xxxx.com/openapi/v1/get/user/?key=xxxxxsign=sadasdastimestamp=2013-03-05 10:14:00c=ca=ad=d2. Controller called by the interface: openapi/v1/get/user/3. Step one: As a server, first check whether the parameters are correct: key (the user's

unknown viruses. Different rules have different frameworks. The following are two defense ideas:1. Divide trust zones, prohibit unauthorized operation of untrusted zone programs, and prevent unauthorized tampering of trust zone programs. The key to this idea is that the trust zone must be clean.2. Create an absolute path whitelist. The whitelist allows operation and tampering. The key to this idea is that

. So when do you need these two services, the answer is when you bind the ng-bind-html times wrong: error: [$SCE: Unsafe]attempting to uses an unsafe value in a safe context. The time. haha ~ ~ ~$sceDelegate$sceDelegate is a service that ANGULARJS provides strict context-escaping services for $SCE services.Typically, you will configure or rewrite $scedelegate to replace the $SCE service to customize the strict context escaping mechanism in ANGULARJS. When $sce offers a multitude of shortcuts, yo

ProblemIf you have an HTML fragment (for example, one div that contains a pair p of tags; an incomplete HTML document), you want to parse it. This HTML fragment can be a user-submitted comment or edit the body section on a CMS page.Way use jsoup.parsebodyfragment (String HTML) method. String html = "Descriptionparsebodyfragment method Create a shell-free document and insert parsed HTML into body element. If you use a normal jsoup.parse (String html) method, usually you can get the same res

enter the verification code for "like? So Wu Hanqing also recommended the best way in white hats, that is, adding a random string token to the form (generated by php and saved in SESSION ), if the random string submitted by the user is the same as the string saved in the SESSION, the user can like it. When B does not know the random string of A, the unauthorized operation is not allowed. I have also used TOKEN for many times on the website. Whether it is the GET or POST method, it usually can w

describe URL matching conditions. Matching target after space: indicates the rule in which the server will respond if the user's access path meets the preceding matching conditions. Another example: Resolve "/bbs" to "/bbs/index. aspx" and match "/bbs/file-1" to "/bbs/show. aspx? Id = 1 ": Rewrite = ^/bbs $/bbs/index. aspxRewrite = ^/bbs/file-([0-9] {1, 6}) $/bbs/show. aspx? Id = $1 Format description: The equal sign of rewrite contains two parts, separated by null. The first half is a regular

script to ensure that the attack will not break through, but there is always a relatively better degree of protection. There are two security protection methods: whitelist and blacklist. The whitelist is simpler and more effective. A whitelist solution is SafeHTML, which is smart enough to identify valid HTML and then can remove any dangerous tags. This needs

ensure that the attack will not break through, but there is always a relatively better degree of protection. There are two security protection methods: whitelist and blacklist. The whitelist is simpler and more effective. A whitelist solution is SafeHTML, which is smart enough to identify valid HTML and then can remove any dangerous tags. This needs to be parsed

To use PHP to implement the UA whitelist, you must be able to match the regular expressions of basically all browsers and major search engine spider UA. This problem may be complicated. let's see if anyone can solve it. To use PHP to implement the UA whitelist, you must be able to match the regular expressions of basically all browsers and major search engine spider UA. This problem may be complicated. let'

managing the application blacklist or whitelist does not cover all applications. In this case, the Organization's Intranet security level depends largely on the user's IT security awareness level, this is obviously a token. The existence of sandbox technology provides new ideas for solving application compliance. Using sandbox technology, IT administrators can automatically put untrusted or non-whitelist p

mitigate this risk. This is the Content Security Policy (CSP ).Source whitelistThe core of XSS attacks is that the browser cannot distinguish whether scripts are injected by a third party or are part of your application. For example, the Google + 1 button will. The browser downloads and executes a page request for Arbitrary Code regardless of its source.CSP defines the Content-Security-PolicyHTTP header to allow you to create a whitelist of trusted s

Some security problems such as QQ and Baidu were discovered some time ago. QQ's sensitive information cannot be sent out. Just pick several sections of Baidu's details and send them out.Vulnerability details:Baidu X Bar posts allow sending FLASH videos with specified whitelist URLs. The whitelist is as follows: FlashWhiteList: ["Copy code Hackers only need to find a vulnerability that can embed FLASH in the

Sometimes a normal PHP script also needs the command execution function. How can we ensure that it runs normally without being blocked by our defense policy? Three ideas are provided here: 1) The write permission and the command execution permission are mutually exclusive. Considering that most of the files obtained by intruders using the upload vulnerability or other 0DAY getshell have W write permissions, the defender often wants to prevent these files from having excessive permissions. There

two security protection methods: whitelist and blacklist. The whitelist is simpler and more effective.A whitelist solution is SafeHTML, which is smart enough to identify valid HTML and then can remove any dangerous tags. This needs to be parsed Based on the HTMLSax package.How to install and use SafeHTML:1. GoHttp://pixel-apes.com/safehtml? Page = safehtmlDownlo